WO2019082665A1 - Stator, motor, stator production method, and motor production method - Google Patents

Abstract

This stator is equipped with a ring-shaped stator core which is centered around a center axis, a support member positioned on one side of the stator core in the axial direction, a coil attached to the stator core, and a busbar terminal which is connected to the coil and is supported by the support member. The busbar terminal has a connecting part which is connected to a leader line drawn from the coil. The support member has a busbar terminal-holding part for holding the busbar terminal. The busbar terminal-holding part has a pass-through section which passes through the busbar terminal-holding part in the radial direction. The connecting part and the pass-through section are positioned so as to overlap in the radial direction.

Description

Stator, motor, method of manufacturing stator and method of manufacturing motor

The present invention relates to a stator, a motor, a method of manufacturing the stator, and a method of manufacturing the motor.

Conventionally, some motors have a stator and a connection terminal connected to an external power supply. For example, in the motor of Patent Document 1, terminals for connecting a stator to an external power supply are provided on a terminal block. The terminal block has a storage groove. A joint portion in which a part of the terminal and the end of the winding are joined is accommodated in the accommodation groove. The storage groove is filled with an adhesive.

International Publication No. 2016/103396

In patent document 1, after joining a part of terminal and the edge part of winding by caulking etc., a junction part is accommodated in a storage groove. It is difficult to join the terminal and the winding while holding the terminal on the terminal block.

In view of the above circumstances, the present invention aims to provide a stator, a motor, a method of manufacturing the stator, and a method of manufacturing the motor, which can connect the bus bar terminals and the lead wires while holding the bus bar terminals in the bus bar terminal holding portion. One of the

According to one aspect of the stator of the present invention, an annular stator core centered on a central axis, a support member disposed on one side in the axial direction of the stator core, a coil attached to the stator core, and the support member A bus bar terminal connected to the coil, wherein the bus bar terminal includes a connection portion connected to a lead wire drawn from the coil, and the support member holds the bus bar terminal for holding the bus bar terminal The bus bar terminal holding portion has a penetrating portion penetrating the bus bar terminal holding portion in the radial direction, and the connecting portion and the penetrating portion are disposed so as to overlap in the radial 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.

In one aspect of the present invention, an annular stator core centered on a central axis, a support member disposed on one side in the axial direction of the stator core, a coil attached to the stator core, and the support member are supported. A method of manufacturing a stator including a bus bar terminal connected to the coil, wherein the bus bar terminal is provided with a U-shaped connecting portion opened on one side in an axial direction in a longitudinal cross section including the central axis. And the step of holding the bus bar terminal in the bus bar terminal holding portion of the support member, the step of passing the lead wire of the coil through the connection portion, and one of the welding terminals of the pair of welding terminals Is brought into contact with the connection portion from one side in the radial direction, and the other of the welding terminals is passed through the penetration portion penetrating the bus bar terminal holding portion in the radial direction to the connection portion And a step of contacting a direction other side, and a step of fixing by welding and the lead wire and the connecting portion.

Further, one aspect of the method of manufacturing a motor according to the present invention includes the step of combining the above-described stator and a rotor rotatable about the central axis with respect to the stator.

According to the stator, the motor, the method for manufacturing the stator, and the method for manufacturing the motor of one aspect of the present invention, the bus bar terminals can be connected to the lead wires while holding the bus bar terminals in the bus bar terminal holding portion.

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 perspective view showing a portion of a stator and a motor of the present embodiment. FIG. 6 is a perspective view showing the support member. FIG. 7 is a perspective view showing a bus bar terminal. FIG. 8 is a cross-sectional view showing a portion of the stator and the motor of the present embodiment, and is a view for explaining welding of the bus bar terminal and the lead wire. FIG. 9 is a cross-sectional view showing a portion of the support member. FIG. 10 is a cross-sectional view showing a portion of the support member, and represents an XX cross section of FIG. FIG. 11 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. The window hole 17 has an arc shape 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 and contacts the upper surface of the protrusion 12a. The claws extend downward from the contact member body. The claws are inserted into the mounting holes of the lid 12, caulked, 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. 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. Although illustration of a code | symbol is abbreviate | omitted, the insulator 50 has the cylindrical extension part which each tooth 22 passes, and the outer wall located in the radial direction outer side of an extension part. The extension part covers the teeth 22. The outer wall extends upward from the extension. The outer wall is disposed radially outward of the coil 40 and extends in the circumferential direction. The outer wall protrudes above the coil 40. The material of the insulator 50 is, for example, an insulating material such as a resin.

The coil 40 is attached to the stator core 20. 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. 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.

The motor 1 of the present embodiment is a three-phase motor. The three phases are the U phase, the V phase and the W phase. 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. 3 to 5, the coil 40 has a lead wire 42 and a connecting wire 41. In FIGS. 3 to 5, the illustration of the housing 11, the contact member 70 and the mold resin portion 35 is omitted. The lead wire 42 is drawn from the coil 40. The lead wire 42 extends upward from the coil 40. The lead wire 42 is an end portion of a lead that constitutes the coil 40. The lead wire 42 is, for example, drawn from the coil 40 through the later-described hole 33 c of the support member 31 to the upper side of the support member 31 and extends in the circumferential direction. The crossover 41 connects at least two coils 40 to each other. 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. In the present embodiment, the motor 1 is a three-phase motor. However, the motor 1 is not limited to the three-phase motor, and may be a single-phase motor, a two-phase motor, or a four-phase or more multi-phase motor.

The support member 31 is disposed on the upper side of 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 31 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 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 portion 33 has a hole 33 c penetrating the main body portion 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. As shown in FIGS. 5 and 6, the main body 33 has a through hole 33 a that penetrates the main body 33 in the axial direction. A plurality of through holes 33a are provided at intervals in the circumferential direction. In the example of the present embodiment, the through hole 33a is in the shape of a square hole. The through holes 33 a are arranged at positions overlapping with the bus bar terminal holding portions 32 when viewed in the axial direction.

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, and three through holes 33 a are also 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. 4 to 6, the bus bar terminal holding portion 32 includes a peripheral wall portion 32a, a first concave portion 32c, a second concave portion 32d, a convex portion 32g, a third concave portion 32e, and a penetrating portion 32h. Have.

The peripheral wall 32 a extends upward from the main body 33. The peripheral wall portion 32a has a tubular shape extending in the axial direction. In the example of the present embodiment, the peripheral wall portion 32a is in the shape of a square tube. The bus bar terminal 43 is inserted into the inside of the peripheral wall portion 32a. The circumferential length of the peripheral wall 32a is larger than the radial length of the circumferential wall 32a. The peripheral wall portion 32a has an upper portion whose circumferential length is substantially constant, and a lower portion which is disposed lower than the upper portion and whose circumferential length increases toward the lower side. . The end surface 32 b facing the upper side of the peripheral wall 32 a is a flat surface. The end face 32b extends in the direction orthogonal to the axial direction.

The first recess 32 c penetrates a portion of the circumferential wall 32 a located radially inward in the radial direction. The first recess 32 c is recessed downward from the end surface 32 b. The axial length of the first recess 32 c is larger than the axial length of the second recess 32 d and the axial length of the third recess 32 e. The lower end portion of the first recess 32c is connected to the inside of the through portion 32h. The circumferential length of the first recess 32 c is larger than the radial length of the first recess 32 c.

The second recess 32 d penetrates a portion of the circumferential wall 32 a located radially outward, in the radial direction. The second recess 32 d is recessed downward from the end surface 32 b. According to the present embodiment, when molding the bus bar terminal holding portion 32 and the bus bar terminal 43 with resin, a conductive portion to be described later of the bus bar terminal 43 through the first concave portion 32 c and the second concave portion 32 d of the bus bar terminal holding portion 32. The melted resin tends to flow into the vicinity of 43 b. Therefore, the short mold in the vicinity of the conductive portion 43b can be suppressed.

A plurality of second recesses 32 d are provided circumferentially at intervals from one another. In the example of the present embodiment, two second recesses 32 d are provided at intervals in the circumferential direction. According to the present embodiment, the resin can be more easily flowed into the vicinity of the conductive portion 43 b through the plurality of second concave portions 32 d. The second recess 32 d has a bottom surface facing upward.

The convex portion 32g protrudes upward between the second concave portions 32d adjacent in the circumferential direction. The convex portion 32 g contacts the bus bar terminal 43 from the radial direction outer side. The convex portion 32g contacts the conductive portion 43b from the radial direction outer side. According to the present embodiment, when the convex portion 32 g comes into contact with the bus bar terminal 43, it is possible to suppress the radial outward collapse of the bus bar terminal 43 at the time of molding or the like. In the example of the present embodiment, the axial position of the surface of the convex portion 32g facing upward is substantially the same as the axial position of the end surface 32b. Further, the length in the circumferential direction of the second recess 32 d is larger than the length in the circumferential direction of the convex portion 32 g.

The third recess 32 e is recessed downward from the end surface 32 b and is opened to the inner peripheral surface (inner side surface) of the peripheral wall portion 32 a. A plurality of third recessed portions 32 e are provided in the bus bar terminal holding portion 32. The plurality of third recesses 32 e are spaced apart from one another in the circumferential direction. In the example of the present embodiment, the third concave portions 32 e are respectively provided at both end portions in the circumferential direction of the peripheral wall portion 32 a. The third concave portion 32e has a chamfered portion in a portion of the third concave portion 32e that opens upward. In the chamfered portion, the opening area in the cross section perpendicular to the axial direction of the third recess 32 e becomes larger toward the upper side. As shown in FIG. 6, the third recess 32 e has a bottom surface 32 f facing upward. The axial position of the bottom surface 32f is lower than the axial position of the bottom surface of the second recess 32d.

The penetrating portion 32 h penetrates the bus bar terminal holding portion 32 in the radial direction. The penetrating portion 32 h penetrates the peripheral wall portion 32 a in the radial direction. The penetrating portion 32 h penetrates at least the lower portion of the peripheral wall portion 32 a. The penetrating portion 32 h opens at the inner peripheral surface (inner side surface) and the outer peripheral surface (outer side surface) of the peripheral wall portion 32 a. In the example of the present embodiment, when viewed from the radial direction, the penetrating portion 32 h has a quadrangular hole shape. The penetrating portion 32 h is located below the second recess 32 d and the third recess 32 e. The circumferential length of the penetrating portion 32 h is larger than the circumferential length of the first recess 32 c. The axial length of the penetrating portion 32 h is larger than the axial length of the first recess 32 c.

The lower end portion of the through portion 32h communicates with the through hole 33a. That is, the through hole 33a is connected to the through portion 32h. Seen from the axial direction, the through portion 32 h is disposed in the through hole 33 a. That is, the entire through portion 32 h overlaps with the through hole 33 a when viewed along the axial direction. Further, the extending direction (axial direction) of the internal space (hole) of the peripheral wall portion 32a and the extending direction (radial direction) of the penetrating portion 32h intersect approximately perpendicularly. According to the present embodiment, when molding the support member 31 by injection molding or the like using resin, as shown in FIGS. 9 and 10, the through hole 33a and the through portion are formed by the mold 100 moving in the axial direction. 32h can be molded and easy to manufacture. Then, the support member 31 having the penetrating portion 32 h can be formed only by the mold which is extracted in the axial direction. Accordingly, it is not necessary to use a complicated mold such as a slide core, and the labor and cost for manufacturing the support member 31 can be reduced.

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. As shown in FIG. 7, the bus bar terminal 43 has a conductive portion 43 b, a connection portion 43 a, and a protrusion 43 c.

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. As shown in FIGS. 3 to 5, conductive 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. Conducting portion 43b protrudes above the end surface 32b facing the upper side of peripheral wall portion 32a. At least a part of the conductive portion 43b is located above the end surface 32b. According to the present embodiment, the bus bar terminal 43 can be easily attached to the bus bar terminal holding portion 32.

The dimension in the circumferential direction of the conductive portion 43b is smaller than the dimension in the circumferential direction in the inside of the peripheral wall portion 32a and the dimension in the circumferential direction of the penetrating portion 32h. The circumferential length of the conductive portion 43b is smaller than the circumferential length of the first recess 32c. As shown in FIG. 4, a circumferential gap G is provided between the circumferential edge of the conductive portion 43 b and the circumferential edge of the first recess 32 c. Therefore, the first concave portion 32c and a portion (concave portion) of the third concave portion 32e located on the upper side of the protrusion 43c described later are connected through the gap G. In addition, a circumferential gap is provided between the circumferential edge of the conductive portion 43b and the circumferential edge of the second recess 32d. Therefore, the second concave portion 32d and the portion of the third concave portion 32e located on the upper side of the protrusion 43c are connected through the gap. 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.

As shown in FIG. 8, at least a part of the connection portion 43 a is disposed on one side in the radial direction with respect to the penetration portion 32 h. In the example of the present embodiment, at least a part of the connection portion 43a is disposed radially inward of the penetration portion 32h. That is, at least a part of the connection portion 43a is disposed so as to protrude inward in the radial direction with respect to the surface of the circumferential wall 32a facing inward in the radial direction. Specifically, at least a portion of the connection portion 43a connected to the lead wire 42 is disposed radially inward of the through portion 32h. 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.

As shown in FIG. 4, the circumferential length of the connection portion 43 a is smaller than the circumferential length of the first recess 32 c. The circumferential length of the connection portion 43a is smaller than the circumferential length of the penetrating portion 32h. The connection portion 43a can pass downward through the first recess 32c, and protrudes radially inward of the first recess 32c. A part of the connection portion 43a is located in the through portion 32h. According to the present embodiment, the bus bar terminal 43 can be easily set in the bus bar terminal holding portion 32 by passing the connection portion 43 a through the first recess 32 c.

As shown in FIG. 5, the connection portion 43 a and the through portion 32 h are disposed so as to overlap in the radial direction. That is, when viewed along the radial direction in which the penetrating portion 32h penetrates, the connection portion 43a overlaps the penetrating portion 32h. The connection portion 43a and the through portion 32h are arranged side by side in the radial direction. Therefore, as in the present embodiment, for example, when the total length of the bus bar terminal 43 is short, etc., even if the connection portion 43a of the bus bar terminal 43 and the bus bar terminal holding portion 32 overlap in the radial direction, Passing through the through portion 32 h enables the connecting portion 43 a and the lead wire 42 to be interposed in the radial direction. Therefore, the connection portion 43a and the lead wire 42 can be stably fixed by welding, caulking or the like.

In the present embodiment, the connection portion 43a and the lead wire 42 are welded. As shown in FIG. 8, since the connection portion 43a and the through portion 32h are arranged side by side in the radial direction, the connection portion 43a and the lead wire 42 can be connected by passing a welding jig or the like through the through portion 32h. It can be fixed by welding. Specifically, when the bus bar terminal 43 and the lead wire 42 are welded and fixed, the connection portion 43 a can be sandwiched between the welding terminals 101 and 102 from both sides in the radial direction. Thus, the lead wire 42 and the bus bar terminal 43 can be easily welded while holding the bus bar terminal 43 in the bus bar terminal holding portion 32, and the space necessary for welding can be easily reduced.

As shown in FIG. 8, in the vertical cross section including the central axis J, the connection portion 43 a has a substantially U shape opened to the upper side. 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. 7, the connection portion 43 a includes a pair of holding wall portions 43 f and 43 g and a connection portion 43 h. The holding wall portions 43f and 43g have a plate shape whose plate surface faces in the radial direction. The holding wall portions 43f and 43g extend in the axial direction. Of the pair of holding wall portions 43f and 43g, one holding wall portion 43f is connected to the lower end of the conducting portion 43b. As shown in FIG. 8, the radially outer portion of the holding wall portion 43f is disposed inside the through portion 32h. Of the pair of holding wall portions 43f and 43g, the other holding wall portion 43g is disposed radially inward of the one holding wall portion 43f. The holding wall portion 43g is disposed radially inward of the penetration portion 32h.

The pair of holding wall portions 43f and 43g are arranged radially spaced from each other. A gap is provided between the pair of holding wall portions 43f and 43g. As shown in FIG. 8, the gap between the pair of holding wall portions 43 f and 43 g is disposed on one side in the radial direction with respect to the penetration portion 32 h. In the example of the present embodiment, the gap between the pair of holding wall portions 43f and 43g is disposed radially inward of the penetration portion 32h. That is, the gap between the pair of holding wall portions 43f and 43g is located radially inward of the surface of the peripheral wall portion 32a facing inward in the radial direction. According to this embodiment, the lead wire 42 can be easily passed through the gap between the pair of holding wall portions 43f and 43g, and the connection portion 43a and the lead wire 42 can be easily connected.

The connecting portion 43h connects lower ends of the pair of holding wall portions 43f and 43g. The lead wire 42 is disposed between the pair of holding wall portions 43f and 43g and contacts at least one of the pair of holding wall portions 43f and 43g and the connecting portion 43h. The lead wire 42 is disposed between the pair of holding wall portions 43f and 43g in the radial direction, and in the example of the present embodiment, contacts the pair of holding wall portions 43f and 43g. In this embodiment, the bus bar terminal 43 can be made compact and simple by such a connecting portion 43 a.

As shown in FIG. 7, the protrusion 43 c protrudes from the conducting portion 43 b in a direction orthogonal to the axial direction. The protrusion 43c extends in the direction orthogonal to the axial direction from the conducting portion 43b. The protrusion 43c extends in a direction parallel to the plate surface of the conducting portion 43b. The protrusion 43 c is in the form of a plate whose plate surface faces in the radial direction. In the illustrated example, the protrusion 43 c has a recess 43 d at the end opposite to the conducting portion 43 b. The recess 43 d is recessed toward the conducting portion 43 b from the end face of the protrusion 43 c facing away from the conducting portion 43 b.

As shown in FIGS. 4 and 6, the protrusion 43c is inserted into the third recess 32e and supported by the bottom surface 32f from the lower side. Thereby, the bus bar terminal 43 is supported from the lower side by the bus bar terminal holding portion 32 and positioned in the axial direction. According to the present embodiment, since the protrusion 43c is inserted into the third recess 32e and supported by the bottom surface 32f, the holding posture of the bus bar terminal 43 during molding is stabilized.

The bus bar terminal 43 has a plurality of protrusions 43 c. In the example of the present embodiment, the protrusions 43c are provided at both ends in the circumferential direction of the conducting portion 43b. The pair of protrusions 43 c protrudes from the conductive portion 43 b in the circumferential direction. The pair of protrusions 43c is fitted into the pair of third recesses 32e. The pair of protrusions 43 c is supported by the bus bar terminal holding portion 32 from the lower side. According to the present embodiment, the holding posture of the bus bar terminal 43 is more stable at the time of molding or the like. As shown in FIG. 4, the upper end of the protrusion 43 c is disposed below the end surface 32 b. That is, in the peripheral wall portion 32a, a recess is formed around the bus bar terminal 43 by an axial step between the protrusion 43c and the end face 32b. The recess is recessed downward from the end surface 32 b. The recess includes a portion of the third recess 32 e that is located above the upper surface of the protrusion 43 c.

When viewed from the axial direction, at least a portion of the bus bar terminal 43 is exposed from the bus bar terminal holding portion 32 through the first recess 32 c. Further, when viewed from the axial direction, at least a part of the bus bar terminal 43 is exposed from the bus bar terminal holding portion 32 through the third concave portion 32 e. When viewed from the radial outer side, the bus bar terminal 43 is exposed from the bus bar terminal holding portion 32 through the second recess 32 d. Further, when viewed from the radial outer side, the bus bar terminal 43 is exposed from the bus bar terminal holding portion 32 through the through portion 32 h. When viewed from inside in the radial direction, the bus bar terminal 43 is exposed from the bus bar terminal holding portion 32 through the first recess 32 c. The lead-out lines 42 held by the penetration portion 32 h, the connection portion 43 a, and the connection portion 43 a are arranged in the radial direction.

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. The number of bus bar terminals 43 may be appropriately changed according to the number of phases of the motor 1.

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, 2 and 11, 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 mold resin portion 35 has a portion disposed in the through portion 32 h. By embedding the resin in penetration portion 32h, the rigidity of bus bar terminal holding portion 32 is enhanced.

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. In the present embodiment, since the bus bar terminal holding portion 32 has the first recess 32 c, the second recess 32 d, the recess (a portion located above the protrusion 43 c of the third recess 32 e), and the through portion 32 h It is easy to pour resin also into the inside of the bus bar terminal holding portion 32 in which the That is, at the time of molding, the melted resin flows into the first recess 32 c, the second recess 32 d, the recess and the through portion 32 h, and the gap around the bus bar terminal 43 is filled with the resin. After these gaps are filled with the resin, the molten resin solidifies. Therefore, when manufacturing the mold resin part 35 by insert molding which makes the support member 31 and the bus-bar terminal 43 an insert member, it can suppress that a short mold and a hollow (gap) generate | occur | produce.

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 FIGS. 1 and 11, the bus bar terminal support portion 38 has a columnar shape protruding 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 38 is the same as the axial position of the end face 32 b of the bus bar terminal holder 32. The end surface 32 b 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.

As shown in FIG. 11, the bus bar terminal support portion 38 includes a first resin portion 38a, a second resin portion 38b, a third resin portion 38c, a fourth resin portion 38d, and a fifth resin portion (not shown). And a sixth resin portion (not shown). That is, the mold resin portion 35 has a first resin portion 38a, a second resin portion 38b, a third resin portion 38c, a fourth resin portion 38d, a fifth resin portion, and a sixth resin portion. .

The first resin portion 38a is disposed in the first recess 32c. The first resin portion 38a is disposed in at least a part of the first recess 32c. In the example of the present embodiment, the first resin portion 38 a is filled in the first recess 32 c. The upper surface of the first resin portion 38 a 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 first resin portion 38a is the same as the axial position of the end surface 32b of the peripheral wall portion 32a.

The second resin portion 38 b is disposed in the second recess 32 d. The second resin portion 38 b is disposed in at least a part of the second recess 32 d. In the example of the present embodiment, the second resin portion 38 b is filled in the second recess 32 d. The upper surface of the second resin portion 38 b 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 second resin portion 38 b is the same as the axial position of the end surface 32 b. A plurality of second resin portions 38 b are provided at intervals in the circumferential direction. In the example of the present embodiment, two second resin portions 38 b are provided at intervals in the circumferential direction. According to the present embodiment, since the first recess 32 c and the second recess 32 d are filled with the resin, the chipping of the bus bar terminal support 38 is suppressed, and the appearance and the sealing performance are well maintained.

The third resin portion 38 c is disposed above the end surface 32 b. The third resin portion 38c is disposed above the first resin portion 38a and the second resin portion 38b. The third resin portion 38c contacts the conducting portion 43b. The third resin portion 38 c is located at the root of the portion of the conduction portion 43 b protruding upward from the bus bar terminal support portion 38. The third resin portion 38c is connected to the first resin portion 38a and the second resin portion 38b. According to the present embodiment, when the mold resin portion 35 is molded with a resin, the third resin portion 38c is easily filled with the resin through the first concave portion 32c and the second concave portion 32d. Therefore, the short mold of the third resin portion 38c can be suppressed.

As viewed in the axial direction, the third resin portion 38c is annular and surrounds the conduction portion 43b. In the example of the present embodiment, as viewed in the axial direction, the third resin portion 38c has a quadrangular ring shape. The circumferential length of the third resin portion 38c is larger than the radial length of the third resin portion 38c. According to the present embodiment, the root of the exposed portion of the conducting portion 43b is stably sealed by the third resin portion 38c.

The surface facing the upper side of the third resin portion 38c is an inclined surface located on the upper side as it approaches the conducting portion 43b in the direction orthogonal to the axial direction. Specifically, of the upper surface of the third resin portion 38c, the portion positioned on the radially inner side of the conductive portion 43b is positioned on the upper side toward the radially outer side. Of the upper surface of the third resin portion 38c, the portion located on the radially outer side of the conducting portion 43b is located on the upper side as it goes inward in the radial direction. Of the upper surface of the third resin portion 38c, a portion located on one side in the circumferential direction of the conductive portion 43b is located on the upper side toward the other side in the circumferential direction. Of the upper surface of the third resin portion 38c, the portion located on the other side in the circumferential direction of the conducting portion 43b is located on the upper side as it goes to one side in the circumferential direction. According to the present embodiment, a large contact area between the third resin portion 38c and the conducting portion 43b is easily secured, and the sealing performance is stabilized. Although not particularly illustrated, the mold used at the time of molding is provided with a tapered guide recess which is an inverted shape of the third resin portion 38c. By the guide concave portion, the conductive portion 43b can be easily set in the mold, and the manufacture is easy.

In the surface (inclined surface) of the third resin portion 38c facing upward, the amount of displacement (i.e., inclination) per unit length per unit length along the direction approaching the conducting portion 43b in the direction orthogonal to the axial direction is It is constant. That is, in the example of the present embodiment, the inclined surface of the third resin portion 38c is planar. However, the present invention is not limited to this, and the sloped surface of the third resin portion 38c may be curved. Specifically, in the surface facing the upper side of the third resin portion 38c, the amount of displacement (inclination) toward the upper side per unit length along the direction approaching the conducting portion 43b in the direction orthogonal to the axial direction is the conducting portion It may be larger or smaller as it approaches 43b. That is, the curved surface is also included in the inclined surface of the third resin portion 38c.

The fourth resin portion 38 d is disposed in a portion (recess) located above the protrusion 43 c of the third recess 32 e. The fourth resin portion 38 d is disposed on at least a part of a portion of the third concave portion 32 e located above the protrusion 43 c. In the example of the present embodiment, the fourth resin portion 38d is filled in a portion located above the protrusion 43c of the third recess 32e. The upper surface of the fourth resin portion 38 d 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 fourth resin portion 38d is the same as the axial position of the end surface 32b. According to the present embodiment, the resin is disposed on the upper side of the protrusion 43 c by the fourth resin portion 38 d. Therefore, the bus bar terminal 43 is more stably supported by the bus bar terminal support portion 38. In addition, the fourth resin portion 38 d is connected to the third resin portion 38 c. For this reason, at the time of molding, the resin is likely to flow from the third resin portion 38c to the fourth resin portion 38d.

The fifth resin portion is located between the inner peripheral surface of the peripheral wall portion 32a and the conductive portion 43b. The fifth resin portion connects the first resin portion 38a and the fourth resin portion 38d. The fifth resin portion has a portion located in the gap G shown in FIG. According to the present embodiment, during molding, the resin can easily flow from the first recess 32 c to the third recess 32 e through the gap G where the fifth resin portion is to be positioned.

The sixth resin portion is located between the inner circumferential surface of the peripheral wall portion 32a and the conducting portion 43b. The sixth resin portion connects the second resin portion 38 b and the fourth resin portion 38 d. The sixth resin portion has a portion located in the gap between the circumferential edge of the conductive portion 43b and the circumferential edge of the second recess 32d. According to the present embodiment, during molding, the resin can easily flow from the second recess 32 d into the third recess 32 e through the gap where the sixth resin portion is to be positioned. As viewed in the axial direction, the third resin portion 38c has a portion overlapping the first resin portion 38a, the second resin portion 38b, the fourth resin portion 38d, the fifth resin portion, and the sixth resin portion. The fifth resin portion and the sixth resin portion are covered from the upper side by the third resin portion 38c.

Next, a method of manufacturing the stator 10 and a method of manufacturing the motor 1 will be described. The manufacturing method of stator 10 includes a connecting portion forming step, a bus bar terminal holding step, a lead wire arranging step, a welding terminal contacting step, a welding step, a stator holding step, and a molding step.

The connection portion forming step is a step of forming, in the bus bar terminal 43, a substantially U-shaped connection portion 43a which opens upward in the vertical cross section including the central axis J. In this process, the connection portion 43a is formed by bending a plate-like portion of the material of the bus bar terminal 43 into a U shape by press processing or the like.

In the bus bar terminal holding step, the bus bar terminal 43 is held by the bus bar terminal holding portion 32 of the support member 31. In this step, the bus bar terminal 43 is held by the bus bar terminal holding portion 32 by inserting the bus bar terminal 43 downward from the opening at the upper side of the bus bar terminal holding portion 32.

The lead wire arranging step is a step of passing the lead wire 42 of the coil 40 into the connection portion 43a. In this step, the lead wire 42 is passed between the pair of holding wall portions 43f and 43g of the connection portion 43a. In the example of the present embodiment, the plurality of lead wires 42 are passed through the connection portion 43a.

As shown in FIG. 8, in the welding terminal contacting step, one welding terminal 101 of the pair of welding terminals 101 and 102 is brought into contact with the connecting portion 43 a from one side in the radial direction, and the other welding terminal 102 is a bus bar This is a step of contacting the connecting portion 43a from the other side in the radial direction through the penetrating portion 32h penetrating the terminal holding portion 32 in the radial direction. In the example of the present embodiment, one welding terminal 101 is brought into contact with the holding wall portion 43g from the inside in the radial direction, and the other welding terminal 102 is brought into contact with the holding wall part 43f from the outside in the radial direction.

The welding step is a step of fixing the connection portion 43a and the lead wire 42 by welding. According to the present embodiment, the through portion 32h is provided in the bus bar terminal holding portion 32. Therefore, when the connecting portion 43a and the lead wire 42 are fixed by welding, the connecting portion 43a and the welding terminals 101 and 102 used for welding are fixed. The lead wire 42 can be sandwiched from both sides in the radial direction. Thus, in a state where the bus bar terminal 43 is held by the bus bar terminal holding portion 32, the lead wire 42 and the bus bar terminal 43 can be easily welded in a small space.

The stator holding step is a step of holding the stator 10 in a mold. In this step, members of the stator 10 except the mold resin portion 35 are inserted into the mold and held. That is, the stator core 20, the insulator 50, the coil 40, the support member 31, and the bus bar terminal 43 are inserted into the mold and held.

The molding step is a step of pouring the melted resin into the mold and covering at least a part of the support member 31 and at least a part of the bus bar terminal 43 with the resin. The molten resin poured into the mold solidifies in a state of covering at least a part of the support member 31 and at least a part of the bus bar terminal 43. According to the present embodiment, by molding with resin, the support member 31 and the bus bar terminal 43 are fixed, and the support state of the bus bar terminal 43 is stabilized. In this embodiment, in this step, a part of the stator core 20, at least a part of the insulator 50, at least a part of the coil 40, at least a part of the support member 31, and at least a part of the bus bar terminal 43 are covered with resin. Therefore, the stator core 20, the insulator 50, the coil 40, the support member 31, and the bus bar terminal 43 can be fixed by resin. Moreover, the insulation between the coil 40 and other members can be stably ensured. In the example of the present embodiment, the entire insulator 50 and the entire coil 40 are covered with resin.

The method of manufacturing the motor 1 includes the steps of fixing the stator 10 in the housing 11 and combining the stator 10 and the rotor 80. In the present embodiment, in the process of fixing the stator 10 in the housing 11, the stator 10 is press-fitted into the housing 11 from the lower opening of the cylindrical portion 13. The worker assembling the motor 1 or the assembling device 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.

The through holes 33 a of the support member 31 may be polygonal holes other than square holes, circular holes, or the like. When viewed from the radial direction, the penetrating portion 32 h is not limited to the rectangular hole shape, and the shape may be appropriately changed in accordance with the shape of the welding terminals 101 and 102.

In the above embodiment, in the description of the bus bar terminal 43 and the like, although one radial side is the radial inner side and the other radial side is the radial outer side, the present invention is not limited thereto. The other side in the radial direction may be radially inward.

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. Also in this case, at the time of molding, the flow of the resin in the vicinity of the conductive portion 43b can be promoted by the first concave portion 32c, the second concave portion 32d and the through portion 32h, and a short mold and a void occur in the vicinity of the conductive portion 43b. Can be suppressed.

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, 31 ... Support member, 32 ... Bus-bar terminal holding part, 32h ... Penetration part, 33 ... Body part, 33a ... Penetration hole, 35 ... Mold resin part, 40 ... Coil, 42 ... lead wire, 43 ... bus bar terminal, 43 a ... connection part, 43 b ... conduction part, 43 c ... projection part, 43 f, 43 g ... holding wall part, 43 h ... connection part, 80 ... rotor, 101, 102 ... welding terminal, J ... Central axis

Claims (15)

An annular stator core centered on the central axis,

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

A coil attached to the stator core;

A bus bar terminal supported by the support member and connected to the coil;

Equipped with

The bus bar terminal has a connection portion connected to a lead wire drawn from the coil,

The support member has a bus bar terminal holding portion that holds the bus bar terminal.

The bus bar terminal holding portion has a penetrating portion penetrating the bus bar terminal holding portion in the radial direction,

A stator, wherein the connecting portion and the penetrating portion are disposed so as to overlap in the radial direction.
The stator according to claim 1, wherein

The bus bar terminal holding portion is an axially extending cylindrical shape, and holds the bus bar terminal inside.
The stator according to claim 2, wherein

The bus bar terminal is inserted into and held by the inside of the bus bar terminal holding portion, and has a conductive portion projecting to one side in the axial direction with respect to the bus bar terminal holding portion.

The connecting portion is connected to the other end of the conducting portion in the axial direction, and protrudes to one side in the radial direction with respect to the conducting portion.

At least one part of the said connection part is a stator arrange | positioned at radial direction one side rather than the said penetration part.
The stator according to claim 3, wherein

The stator, wherein the bus bar terminal has a pair of protruding portions protruding from the conductive portion in the circumferential direction and supported by the bus bar terminal holding portion from the other side in the axial direction.
The stator according to any one of claims 1 to 4, wherein

The support member is made of resin,

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

The bus bar terminal holding portion extends from the main body portion to one side in the axial direction,

The main body portion has a through hole axially penetrating the main body portion and connected to the through portion,

A stator, wherein the through portion is disposed in the through hole when viewed in the axial direction.
The stator according to any one of claims 1 to 5, wherein

A stator comprising a resin-made mold resin portion covering at least a part of the support member and at least a part of the bus bar terminal.
The stator according to claim 6, wherein the connection portion is covered by the mold resin portion.
The stator according to claim 6 or 7, wherein

The stator, wherein the mold resin portion has a portion disposed in the through portion.
The stator according to any one of claims 1 to 8, wherein

The connection is

A pair of retaining walls spaced from one another in the radial direction;

And a connecting portion connecting the end portions on the other side in the axial direction of the pair of holding wall portions,

The stator, wherein the lead-out wire is disposed between the pair of holding wall portions and contacts at least one of the pair of holding wall portions and the connecting portion.
The stator according to claim 9, wherein

The stator, wherein a gap between the pair of holding wall portions is disposed on one side in the radial direction relative to the penetration portion.
The stator according to any one of claims 1 to 10, wherein

The stator, wherein the connection portion and the lead wire are welded.
The stator according to any one of claims 1 to 11.

A motor rotatable about the central axis with respect to the stator.
An annular stator core centered on the central axis,

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

A coil attached to the stator core;

A bus bar terminal supported by the support member and connected to the coil;

A method of manufacturing a stator comprising

Forming in the bus bar terminal a U-shaped connecting portion opened on one side in an axial direction in a longitudinal cross section including the central axis;

Holding the bus bar terminal on the bus bar terminal holding portion of the support member;

Passing the lead wire of the coil through the connection;

Of the pair of welding terminals, one of the welding terminals is brought into contact with the connecting portion from one side in the radial direction, and the other welding terminal is connected through the penetration portion penetrating the bus bar terminal holding portion in the radial direction Contacting the part from the other side in the radial direction,

Fixing the connection portion and the lead wire by welding.
The method of manufacturing a stator according to claim 13, wherein

Holding the stator in a mold;

And d) pouring the molten resin into the mold, and covering at least a part of the support member and at least a part of the bus bar terminal with the resin.
A method of manufacturing a motor, comprising the step of combining the stator according to claim 13 and a rotor rotatable about the central axis with respect to the stator.

Images