JPWO2018180638A1 - motor - Google Patents

Abstract

In one aspect of the motor of the present invention, the stator includes a stator core having a core back and a plurality of teeth, an insulator mounted on the stator core, and a plurality of coils respectively mounted on the plurality of teeth via the insulator. Have. The insulator has a cylindrical tubular portion through which the teeth are passed and the coil is mounted, and an axially protruding axially protruding one side in the axial direction from an edge on one axial side of the radially one end of the cylindrical portion. A pressing portion protruding from the axial protruding portion to the other side in the radial direction. The axial protruding portion extends to one side in the circumferential direction from the cylindrical portion. The pressing portion is disposed on one side in the circumferential direction from the cylindrical portion. The coil is formed by winding a conductive wire. From the coil, a winding end side conductor, which is an end on the winding end side of the conductor, extends to one side in the axial direction. The winding end-side conductor is disposed between the pressing portion and the coil on the other side in the circumferential direction of the pressing portion when viewed along the axial direction.

Description

  The present invention relates to a motor.

  2. Description of the Related Art A motor having a structure in which a winding end of a coil projects and is connected to another member is known. For example, Patent Literature 1 describes a winding end connected to a terminal of a bus bar.

International Publication No. WO 2008/146502

  Among the above winding ends, the winding end on the winding end side is easily separated from the coil and easily moved. Therefore, for example, it is conceivable to provide a gripper for gripping the winding end on the winding end side in the insulator to suppress the movement of the winding end. However, in this case, the structure of the insulator is likely to be complicated, which may increase the labor and cost of manufacturing the motor.

  In view of the above circumstances, an object of the present invention is to provide a motor having an insulator having a simple structure and capable of suppressing movement of an end on the winding end side of a conductive wire forming a coil. .

  One aspect of the motor according to the present invention includes a rotor having a shaft arranged along a central axis, and a stator having a coil and facing the rotor with a gap in a radial direction. The stator includes a stator core having a core back extending in a circumferential direction and a plurality of teeth extending radially from the core back, an insulator mounted on the stator core, and mounted on the plurality of teeth via the insulator, respectively. And a plurality of the coils. The insulator passes through the teeth, and has a cylindrical tubular portion on which the coil is mounted, and protrudes axially to one side from one axial edge of one radial end of the cylindrical portion. And a pressing portion projecting from the axial projecting portion to the other side in the radial direction. The axial protruding portion extends to one side in the circumferential direction from the cylindrical portion. The pressing portion is disposed on one side in the circumferential direction from the cylindrical portion. The coil is formed by winding a conductive wire. From the coil, a winding end-side conductor, which is an end on the winding end side of the conductor, extends to one side in the axial direction. The winding end-side conductor is disposed between the pressing portion and the coil on the other side in the circumferential direction of the pressing portion as viewed in the axial direction.

  According to one aspect of the present invention, there is provided a motor having a simple structure and including an insulator capable of suppressing movement of an end on the winding end side of a conductive wire forming a coil.

FIG. 1 is a sectional view showing a motor according to the present embodiment. FIG. 2 is a perspective view showing the stator and the first bus bar of the present embodiment. FIG. 3 is a diagram in which a part of the stator and the first bus bar of the present embodiment are viewed from above. FIG. 4 is a perspective view showing the insulator piece of the present embodiment. FIG. 5 is a view of a part of the insulator piece of the present embodiment viewed from one circumferential side. FIG. 6 is a perspective view showing the wire holding portion of the present embodiment. FIG. 7 is a view showing the wire holding portion of the present embodiment, and is a cross-sectional view taken along the line VII-VII in FIG. FIG. 8 is a view of a part of the stator of the present embodiment as viewed from above. FIG. 9 is a diagram showing a part of the insulator and a part of the first bus bar of the present embodiment, and is a cross-sectional view taken along the line IX-IX in FIG. FIG. 10 is a perspective view showing a part of the insulator and a part of the first bus bar of the present embodiment.

  The Z-axis direction appropriately shown in each drawing is a vertical direction in which the positive side is the upper side and the negative side is the lower side. The center axis J appropriately shown in each figure is a virtual line that 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 up-down direction is simply referred to as “axial direction”, the radial direction around the central axis J is simply referred to as “radial direction”, and the central axis J Is referred to simply as “circumferential direction”. In each of the drawings, the circumferential direction is appropriately indicated by an arrow θ. In the present embodiment, the outside in the radial direction corresponds to one side in the radial direction, and the inside in the radial direction corresponds to the other side in the radial direction.

  The positive side in the Z-axis direction in the axial direction is referred to as “upper side”, and the negative side in the Z-axis direction in the axial direction is referred to as “lower side”. 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. Further, a side that advances counterclockwise when viewed from above in the circumferential direction from the upper side, that is, a side that advances in the direction of the arrow θ is referred to as “one circumferential side”. The side that advances clockwise when viewed from the upper side to the lower side in the circumferential direction, that is, the side that advances in the direction opposite to the direction of the arrow θ is referred to as “the other side in the circumferential direction”.

  The terms “upper and lower”, “upper” and “lower” are simply names for describing the relative positional relationships of the respective components, and the actual positional relationships and the like are positional relationships and the like other than the positional relationships and the like indicated by these names. You may.

  As shown in FIGS. 1 and 2, the motor 10 of the present embodiment includes a housing 11, a rotor 20, bearings 51 and 52, a stator 30, a first bus bar 100, a bearing holder 50, and a bus bar unit 90. And a control device 80. The bus bar unit 90 has a bus bar holder 60 and a second bus bar 70. As shown in FIG. 1, the housing 11 accommodates each part of the motor 10. The housing 11 has a cylindrical shape centered on the central axis J. The housing 11 holds the bearing 51 on the lower bottom.

  The rotor 20 has a shaft 21, a rotor core 22, and a magnet 23. The shaft 21 is arranged along the central axis J. The shaft 21 is rotatably supported by bearings 51 and 52. The rotor core 22 has an annular shape fixed to the outer peripheral surface of the shaft 21. The magnet 23 is fixed to the outer peripheral surface of the rotor core 22. The bearing 51 rotatably supports the shaft 21 below the rotor core 22. The bearing 52 rotatably supports the shaft 21 above the rotor core 22. The bearings 51 and 52 are ball bearings.

  The stator 30 faces the rotor 20 with a gap in the radial direction. Stator 30 surrounds rotor 20 radially outside rotor 20. The stator 30 has a stator core 31, a plurality of coils 34, and an insulator 40. That is, the motor 10 includes the stator core 31, the plurality of coils 34, and the insulator 40. In addition, in FIG. 1, the insulator 40 is shown in a simplified manner. The stator core 31 has a core back 32 and a plurality of teeth 33. As shown in FIG. 2, the core back 32 extends in the circumferential direction. More specifically, the core back 32 has a cylindrical shape centered on the central axis J.

  As shown in FIG. 3, the teeth 33 extend from the core back 32 in the radial direction. More specifically, the teeth 33 extend radially inward from the radially inner side surface of the core back 32. The plurality of teeth 33 are arranged at equal intervals over one circumference in the circumferential direction. For example, twelve teeth 33 are provided.

  The tooth 33 has a tooth main body 33e and an umbrella part 33f. The teeth main body 33 e is a portion extending radially inward from the radially inner side surface of the core back 32. The umbrella part 33f is connected to a radially inner end of the tooth body 33e. The umbrella portion 33f protrudes from both sides of the teeth main body 33e in the circumferential direction.

  The plurality of coils 34 are attached to the plurality of teeth 33 via the insulators 40, respectively. The coil 34 is configured such that a conductive wire is wound around the teeth 33 via the insulator 40. For example, twelve coils 34 are provided.

  As shown in FIG. 4, in the present embodiment, the coil 34 is configured by winding a conductive wire in a rectangular frame shape with rounded corners. The outer diameter of the coil 34 is the largest at the outermost conductor 34e wound around the outermost conductor among the conductors forming the coil 34. The outermost conductor 34e is a portion of the coil 34 located closer to the outside in the radial direction. The outermost conductor 34e is disposed radially inward of the radially outer end of the coil 34. The outermost conductor 34e has a rectangular frame shape with rounded corners.

  From each coil 34, coil lead wires 34a and 34b are drawn upward. The coil lead wires 34a and 34b are conductors extending upward from the coil 34, and are ends of the conductors forming the coil 34. The coil lead wire 34a is an end on the winding start side of a conductive wire constituting the coil 34. The coil lead wire 34b is an end on the winding end side of a wire forming the coil 34. The coil lead wire 34a is electrically connected to the second bus bar 70. The coil lead wire 34b is electrically connected to the first bus bar 100. In the present embodiment, the coil lead wire 34b corresponds to a winding-end-side conductor.

  As shown in FIGS. 2 and 3, the insulator 40 is mounted on the stator core 31. In the present embodiment, the insulator 40 is a holding member that holds the first bus bar 100. The insulator 40 has a plurality of insulator pieces 40P. The plurality of insulator pieces 40 </ b> P are arranged along the circumferential direction and attached to each of the teeth 33. In the present embodiment, the plurality of insulator pieces 40P are separate members. The shapes of the plurality of insulator pieces 40P are the same as each other. As shown in FIG. 4, the insulator piece 40P is configured by, for example, two different members being connected in the axial direction.

  The insulator piece 40P has a cylindrical portion 41, an inner protruding portion 42, a conductor holding portion 43, an outer protruding portion 44, a bus bar holding portion 45, and a pressing portion 48. That is, the insulator 40 includes the cylindrical portion 41, the inner protruding portion 42, the conductor holding portion 43, the outer protruding portion 44, the bus bar holding portion 45, and the pressing portion 48.

  The cylindrical portion 41 has a cylindrical shape extending in the radial direction. More specifically, the tubular portion 41 has a rectangular tubular shape. As shown in FIG. 5, the teeth 33 are passed through the cylindrical portion 41. The teeth main body 33e is inserted into the cylindrical portion 41. A coil 34 is wound around the outer periphery of the cylindrical portion 41. Thereby, the coil 34 is mounted on the tubular portion 41. As shown in FIG. 4, the inner protruding portion 42 protrudes upward from the upper edge of the radially inner end of the cylindrical portion 41. The inner protruding part 42 is arranged above the umbrella part 33f. Note that the cylindrical portion 41 does not have to cover a part of the outer peripheral surface of the teeth 33. In this case, for example, a gap may be provided between two separate members constituting the insulator piece 40P, and the outer peripheral surface of the teeth 33 may be exposed to the outside of the cylindrical portion 41 via the gap.

  The conductor holding portion 43 extends upward from a portion on the other side in the circumferential direction of the inner protrusion 42. In the present embodiment, the conductor holding portion 43 extends upward from the other end in the circumferential direction of the inner protrusion 42. As a result, the conductor holding portion 43 is connected to the radially inner end of the cylindrical portion 41 via the inner projecting portion 42 and protrudes upward from the cylindrical portion 41. The conductor holding portion 43 has a substantially quadrangular prism shape. The circumferential dimension of the conductor holding portion 43 decreases from the lower side to the upper side. Note that the conductive wire holding portion 43 may extend upward from a portion on one circumferential side of the inner protruding portion 42. Further, the wire holding portion 43 may extend upward from one end in the circumferential direction of the inner protruding portion 42.

  As shown in FIG. 6, the conductor holding portion 43 has a holding groove 43a. The coil lead wire 34a is held in the holding groove 43a. The holding groove 43a is recessed radially inward from a radially outer surface of the wire holding portion 43 and extends in the axial direction. The holding groove 43a has a first opening 43b and a second opening 43c. The first opening 43b opens radially outward. The first opening 43b extends in the axial direction. The first opening 43b has a rectangular shape that is long in the axial direction. The upper end of the first opening 43b is connected to the second opening 43c. The second opening 43c opens upward at the upper end of the holding groove 43a. That is, the upper end of the holding groove 43a is open. The second opening 43c has a substantially circular shape. The lower end of the holding groove 43a is closed.

  In a cross section orthogonal to the axial direction, the inner edge of the holding groove 43a has an arc shape. The inner diameter of the holding groove 43a is larger than the opening width of the first opening 43b. The opening width of the first opening 43b is a dimension of the first opening 43b in a direction orthogonal to both the axial direction in which the first opening 43b extends and the radial direction in which the first opening 43b opens. The opening width of the first opening 43b is uniform throughout the axial direction when the coil lead 34a is not held, and is smaller than the outer diameter of the coil lead 34a. The opening width of the second opening 43c is larger than the outer diameter of the coil lead wire 34a. The opening width of the second opening 43c is the inner diameter at the upper end of the holding groove 43a.

  As shown in FIGS. 6 and 7, the lower portion of the bottom surface of the holding groove 43a is an inclined portion 43d which is located radially outward toward the lower side. The lower end of the inclined portion 43d is connected to a radially outer surface of the conductive wire holding portion 43.

  The coil lead wire 34a held by the holding groove 43a has a first portion 34c and a second portion 34d. The first portion 34c is a portion that is inserted into a lower portion of the first opening 43b. The second portion 34d is connected to the tip side of the first portion 34c, that is, the upper side. The second portion 34d is a portion that passes through the inside of the holding groove 43a and protrudes from the second opening 43c to the outside of the holding groove 43a.

  As described above, when the coil lead 34a is not held, the opening width of the first opening 43b is smaller than the outer diameter of the coil lead 34a. Therefore, when the first portion 34c of the coil lead wire 34a is inserted into the first opening 43b, the edges 43e and 43f on both sides in the circumferential direction of the first opening 43b are partially elastically deformed, and the first opening 43b. The opening width of 43b partially widens. Thus, the edges 43e and 43f on both sides in the circumferential direction of the first opening 43b come into contact with the first portion 34c in an elastically deformed state, and sandwich the first portion 34c. Therefore, the coil lead wire 34a can be firmly fixed to the holding groove 43a.

  On the other hand, the opening width of the second opening 43c is larger than the outer diameter of the coil lead wire 34a. Therefore, a gap is provided between the second portion 34d passing through the second opening 43c and the inner edge of the second opening 43c. Accordingly, the coil lead wire 34a is guided upward along the holding groove portion 43a, and the coil lead wire 34a is positioned while the coil lead wire 34a is positioned by the gap between the inner edge of the second opening 43c and the coil lead wire 34a. The position of the lead wire 34a can be finely adjusted. Therefore, it is easy to connect the coil lead wire 34a to another member. In the present embodiment, the other member is the second bus bar 70.

  The opening width of the first opening 43b is increased in the portion where the first portion 34c is inserted and in the vicinity thereof so as to be the same as the outer diameter of the first portion 34c, but in other portions the first portion 43c has the first portion. 34c is smaller than the outer diameter. Thus, at the upper end of the holding groove 43a, the opening width of the first opening 43b is smaller than the outer diameter of the coil lead wire 34a. Therefore, it is possible to prevent the second portion 34d housed in the holding groove 43a from coming out of the holding groove 43a through the first opening 43b.

  The upper end of the first opening 43b is connected to the second opening 43c. For this reason, the worker holding the coil lead wire 34a in the holding groove portion 43a tilts the coil lead wire 34a extending radially inward of the wire holding portion 43 and above the lead wire holding portion 43 inward in the radial direction to make the first opening. By pushing the coil lead wire 34a from the portion 43b into the holding groove 43a, the coil lead wire 34a can be easily held in the holding groove 43a.

  As described above, according to the present embodiment, the motor 10 having the structure that can easily and firmly hold the coil lead wire 34a and that can finely adjust the position of the coil lead wire 34a is obtained.

  Further, according to the present embodiment, the lower portion of the bottom surface of the holding groove 43a is the inclined portion 43d that is located radially outward as going downward. Therefore, as shown in FIG. 7, the coil lead wire 34a can be made to follow the inclined portion 43d. Thus, when holding the coil lead 34a in the holding groove 43a, the coil lead 34a does not need to be largely bent, and the coil lead 34a can be easily held in the holding groove 43a.

  Further, according to the present embodiment, the inner edge of the holding groove 43a has an arc shape in a cross section orthogonal to the axial direction. Therefore, the inner side surface of the holding groove portion 43a can be along the outer peripheral surface of the second portion 34d housed inside the holding groove portion 43a. Therefore, the second portion 34d can be stably held inside the holding groove 43a, and the coil lead 34a can be easily positioned with high accuracy.

  As shown in FIG. 4, the outer protruding portion 44 protrudes upward from the upper edge of the radially outer end of the cylindrical portion 41. The outer protrusion 44 extends to one side in the circumferential direction than the cylinder 41. More specifically, the outer protrusion 44 extends on both sides in the circumferential direction than the cylinder 41. In the present embodiment, the outer protruding portion 44 is a part of a flange portion extending from the entire circumference of a radially outer end of the cylindrical portion 41 to the outside of the cylindrical portion 41. In the present embodiment, the outer protrusion 44 corresponds to an axial protrusion.

  The bus bar holding part 45 has a base part 45a, support parts 45b and 45c, a pair of wall parts 46a and 46b, and a pair of wall parts 47a and 47b. That is, the insulator 40 has a base 45a, support portions 45b and 45c, a pair of walls 46a and 46b, and a pair of walls 47a and 47b. The base 45a protrudes upward from the outer protrusion 44. The base 45a has a substantially rectangular parallelepiped shape extending in the circumferential direction. The center in the circumferential direction of the base portion 45a is disposed closer to the other side in the circumferential direction than the center in the circumferential direction of the cylindrical portion 41.

  The support portion 45b protrudes upward from a portion on one circumferential side of the upper end portion of the base 45a. As shown in FIG. 8, the support portion 45b is arranged on one side in the circumferential direction from the center in the circumferential direction of the cylindrical portion 41. The support portion 45b extends linearly in a direction orthogonal to the axial direction. The direction in which the support portion 45b extends is a direction in which the tooth 33 to which the insulator piece 40P is attached is located inward in the radial direction in which the tooth 33 on which the insulator piece 40P extends extends toward one side in the circumferential direction. A direction parallel to the direction in which the support portion 45b extends is referred to as a “first extension direction”.

  The support portion 45b extends from a portion of the upper end portion of the base 45a closer to one circumferential side to an end portion on one circumferential side. As shown in FIG. 9, the cross-sectional shape of the support portion 45b orthogonal to the first extending direction is a substantially trapezoidal shape in which the upper base is smaller than the lower base. In the direction orthogonal to the first extending direction, both edges at the upper end of the support portion 45b are rounded. The support portion 45b supports a first busbar body 100a described below from below.

  As shown in FIG. 4, the support portion 45c protrudes upward from the other end in the circumferential direction of the upper end of the base 45a. As shown in FIG. 8, the support portion 45c is disposed on the other side in the circumferential direction from the center in the circumferential direction of the cylindrical portion 41. The support portion 45c extends linearly in a direction orthogonal to the axial direction and intersecting the first extending direction of the support portion 45b. The direction in which the support portion 45c extends is a direction in which the teeth 33 on which the insulator piece 40P is mounted are located inward in the radial direction in which the teeth 33 extend, toward the other side in the circumferential direction. A direction parallel to the direction in which the support portion 45c extends is referred to as a “second extension direction”.

  The support portion 45c extends from the central portion in the circumferential direction of the upper end portion of the base portion 45a to the other end in the circumferential direction. Although not shown, the cross-sectional shape of the support 45c perpendicular to the second extending direction is the same as that of the support 45b, for example. The support portion 45c supports a first busbar main body 100a described below from below. The length of the support 45c is greater than the length of the support 45b.

  As shown in FIG. 4, the wall portion 46a protrudes upward from a radially inner edge portion of the upper end portion of the base portion 45a on one circumferential side. The wall portion 46b protrudes upward from a radially outer edge portion of the upper end portion of the base portion 45a on one side in the circumferential direction. The wall 46a is disposed radially inside the support 45b. The wall 46b is arranged radially outside the support 45b. The pair of walls 46a and 46b extend in the first extending direction. As shown in FIG. 8, the extending length of the wall 46a and the extending length of the wall 46b are substantially the same as the extending length of the support 45b.

  The pair of wall portions 46a and 46b are arranged side by side in a direction orthogonal to the axial direction and intersecting the first extending direction. The direction in which the pair of wall portions 46a and 46b are arranged is referred to as a first holding direction. In the present embodiment, the first sandwiching direction is a direction orthogonal to both the axial direction and the first extending direction. The pair of walls 46a and 46b sandwich the support 45b in the first clamping direction. That is, the support portion 45b is disposed between the pair of wall portions 46a and 46b. A wall surface 46c of the wall portion 46a on the support portion 45b side extends in the first extending direction. The wall surface 46d of the wall portion 46b on the support portion 45b side extends in the first extending direction. The wall surface 46c and the wall surface 46d face each other with a gap therebetween. That is, the pair of wall portions 46a and 46b have wall surfaces 46c and 46d facing each other with a gap therebetween and extending in the first extending direction.

  As shown in FIG. 9, the distance L2 between the upper part of the wall surface 46c and the upper part of the wall surface 46d is greater than the distance L1 between the lower part of the wall surface 46c and the lower part of the wall surface 46d. Is also big. Therefore, the distance between the pair of wall portions 46a and 46b increases in the upper portion.

  As shown in FIG. 4, the wall portion 47a protrudes upward from the radially inner edge portion of the upper end portion of the base portion 45a on the other side in the circumferential direction. The wall portion 47a is disposed radially inward of a portion on one circumferential side of the support portion 45c. The wall portion 47a is not disposed radially inward of the other circumferential portion of the support portion 45c. The wall portion 47b protrudes upward from a radially outer edge portion of the upper end portion of the base 45a on the other side in the circumferential direction. The wall portion 47b is disposed radially outside the support portion 45c.

  The pair of walls 47a and 47b extend in the second extending direction. As shown in FIG. 8, the extending length of the wall portion 47a is smaller than the extending length of the support portion 45c. The length that the wall portion 47b extends is longer than the length that the wall portions 46a, 46b, and 47a extend. The length that the wall portion 47b extends is substantially the same as the length that the support portion 45c extends. The wall 47a has substantially the same shape as the wall 46a, except that the wall 47a is symmetric in the circumferential direction.

  The pair of wall portions 47a and 47b are arranged side by side in a direction orthogonal to the axial direction and intersecting the second extending direction. The direction in which the pair of wall portions 47a and 47b are arranged is referred to as a second holding direction. In the present embodiment, the second sandwiching direction is a direction orthogonal to both the axial direction and the second extending direction. The pair of walls 47a and 47b sandwich the support 45c in the second sandwiching direction. That is, the support portion 45c is disposed between the pair of wall portions 47a and 47b. The wall surface 47c of the wall portion 47a on the support portion 45c side extends in the second extending direction. The wall surface 47d of the wall portion 47b on the support portion 45c side extends in the second extending direction. The wall surface 47c and the wall surface 47d face each other with a gap therebetween. That is, the pair of wall portions 47a and 47b have wall surfaces 47c and 47d facing each other with a gap therebetween and extending in the second extending direction. Although illustration is omitted, the distance between the pair of wall portions 47a and 47b increases in the upper portion, similarly to the wall portions 46a and 46b.

  In one insulator piece 40P, a space G1 is provided between the walls 46a, 46b and the walls 47a, 47b. The support portion 45b and the support portion 45c are arranged apart from each other in the circumferential direction via the space G1. The wall portions 46a and 46b and the wall portions 47a and 47b are arranged apart from each other in the circumferential direction via the space portion G1. In the present embodiment, the space G1 includes a space between the support portions 45b and 45c in the circumferential direction and a space between the walls 46a and 46b and the walls 47a and 47b in the circumferential direction. The space part G1 penetrates the bus bar holding part 45 in the radial direction. The space portion G1 is open to the upper side and both sides in the radial direction. The space portion G1 is disposed at the same circumferential position as the center of the cylindrical portion 41 in the circumferential direction.

  As shown in FIG. 3, the first extending direction in which the support portion 45b and the pair of wall portions 46a, 46b extend is such that the support portion 45c and the pair of wall portions 47a, 47b in the insulator piece 40P adjacent to one circumferential side extend. It is parallel to the second stretching direction. On the extension of the support portion 45b and the pair of wall portions 46a, 46b, the support portion 45c and the pair of wall portions 47a, 47b of the insulator piece 40P adjacent to one circumferential side are arranged.

  In a pair of insulator pieces 40P adjacent in the circumferential direction, the wall portions 47a and 47b of the insulator piece 40P arranged on one side in the circumferential direction and the wall portions 46a and 46b of the insulator piece 40P arranged on the other side in the circumferential direction. A space G2 is provided between them. The walls 47a and 47b of the insulator piece 40P arranged on one side in the circumferential direction and the walls 46a and 46b of the insulator piece 40P arranged on the other side in the circumferential direction are separated in the circumferential direction via the space G2. Be placed.

  As shown in FIG. 4, the space portion G2 includes a space between the busbar holding portions 45 of the pair of insulator pieces 40P adjacent in the circumferential direction in the circumferential direction. The space part G2 is open to the upper side and both sides in the radial direction. The circumferential dimension of the space G2 is larger than the circumferential dimension of the space G1.

  As shown in FIG. 10, the support portion 45b and the support portion 45c are spaced apart in the circumferential direction via the space G1, so that the support portion 45b and the support portion 45c are recessed downward. A recess 45d is provided. That is, the insulator 40 has the concave portion 45d. The recess 45d opens on both sides in the radial direction. The inside of the concave portion 45d is included in, for example, the space portion G1.

  As shown in FIG. 8, the bus bar holding portion 45 has grooves 45e, 45f, 45g, and 45h. That is, the insulator 40 has the grooves 45e, 45f, 45g, and 45h. As shown in FIG. 9, the groove 45e is recessed downward between the wall 46a and the support 45b. The groove 45f is recessed downward between the wall 46b and the support 45b. As shown in FIG. 8, the grooves 45e and 45f extend in the first extending direction. Both ends in the first extending direction of the grooves 45e and 45f are open. The groove 45g is recessed downward between the wall 47a and the support 45c. The groove 45h is recessed downward between the wall 47b and the support 45c. The grooves 45g and 45h extend in the second extending direction. Both ends of the grooves 45g and 45h in the second extending direction are open.

  The pressing portion 48 protrudes radially inward from the outer protruding portion 44. More specifically, the pressing portion 48 protrudes radially inward from one circumferential end of the outer protruding portion 44. The pressing portion 48 is disposed on one side in the circumferential direction from the cylindrical portion 41. The holding portion 48 is a portion that holds the coil lead wire 34b.

  The coil lead wire 34b is disposed between the pressing portion 48 and the coil 34 on the other circumferential side of the pressing portion 48 when viewed along the axial direction. Therefore, it is easy to pinch the coil lead wire 34b between the holding portion 48 and the coil 34, and it is possible to suppress the coil lead wire 34b from moving apart from the coil 34. This makes it easy to connect the coil lead wire 34 b, which is the end on the winding end side, of the conductive wire forming the coil 34 to the first bus bar 100. Further, since the coil lead wire 34b can be pressed by using the coil 34, the shape of the holding portion 48 can be easily simplified. Thereby, the structure of the insulator 40 can be simplified, and the manufacturing cost of the motor 10 can be reduced. As described above, according to the present embodiment, the motor 10 including the insulator 40 which has a simple structure and can suppress the movement of the coil lead wire 34b on the winding end side is obtained.

  In the present embodiment, the coil lead wire 34b is disposed between the outermost conductor 34e and the outer protrusion 44 in the radial direction. When viewed along the axial direction, the distance between the end on one side in the circumferential direction of the outermost conductor 34e and the pressing portion 48 is smaller than the outer diameter of the coil lead wire 34b. Therefore, it is possible to suppress the coil lead wire 34b from coming out from between the outermost conductor 34e and the pressing portion 48 to one side in the circumferential direction. Accordingly, it is possible to further prevent the coil lead wire 34b from moving apart from the coil 34.

  As shown in FIG. 4, the holding portion 48 extends in the axial direction. Thus, the axial dimension of a portion of the coil lead wire 34b supported by the pressing portion 48 can be increased. Therefore, the movement of the coil lead wire 34b can be further suppressed by the pressing portion 48. Further, the coil lead wire 34b can be guided upward along the pressing portion 48, and the coil lead wire 34b can be easily positioned with high accuracy.

  The lower end of the pressing portion 48 is disposed below the upper corner 34f of the outermost conductor 34e. A portion of the outermost conductor 34e below the corner 34f is a portion extending in the axial direction, and is an end of the outermost conductor 34e on one side in the circumferential direction. Therefore, by extending the pressing portion 48 below the corner portion 34f, the end of the outermost peripheral conductor 34e on one side in the circumferential direction and a part of the pressing portion 48 are opposed to each other in a direction orthogonal to the axial direction. Can be. Thereby, it is possible to more reliably suppress the coil lead wire 34b from coming out from between the end on the one side in the circumferential direction of the outermost conductor 34e and the holding portion 48 to one side in the circumferential direction.

  As shown in FIG. 5, the lower end portion of the pressing portion 48 is disposed at the same position in the axial direction as the upper surface of the tooth 33, or at a position higher than the upper surface of the tooth 33. Therefore, it is possible to suppress the pressing portion 48 from extending too far. Thereby, when winding the conductive wire to produce the coil 34, it is possible to suppress the conductive wire from interfering with the pressing portion 48. Therefore, the coil 34 is easily manufactured. In the present embodiment, the lower end of the pressing portion 48 is disposed at the same position in the axial direction as the upper surface of the teeth 33.

  The upper end of the holding portion 48 is disposed above the coil 34. Therefore, the axial dimension of the pressing portion 48 can be increased, and the axial size of the portion of the coil lead wire 34b supported by the pressing portion 48 can be further increased. Therefore, the movement of the coil lead wire 34b can be further suppressed by the pressing portion 48. In addition, the coil lead 34b can be more easily guided along the holding portion 48, and the coil lead 34b can be more accurately positioned.

  As shown in FIG. 2, the first bus bar 100 is electrically connected to the stator 30 above the stator 30. In the present embodiment, the first bus bar 100 is a neutral bus bar that connects two or more coils 34 as neutral points. The first bus bar 100 has a plate shape whose plate surface is orthogonal to the axial direction. Therefore, the axial dimension of the first bus bar 100 can be reduced, and the motor 10 can be easily reduced in the axial direction. The first bus bar 100 extends along a plane orthogonal to the axial direction. In the present embodiment, for example, four first bus bars 100 are provided. The shapes of the first bus bars 100 are the same as each other.

  In this specification, in each part of the first bus bar, a direction orthogonal to both the thickness direction of each part and the direction in which each part extends is referred to as a “width direction” of each part. In the present embodiment, the width direction of the first bus bar is a direction orthogonal to the axial direction.

  As shown in FIG. 3, one first bus bar 100 is supported from below by four insulator pieces 40P that are adjacent in the circumferential direction. The four insulator pieces 40P supporting the first bus bar 100 are sequentially arranged from one circumferential side to the other circumferential side from the first insulator piece 40P1, the second insulator piece 40P2, the third insulator piece 40P3, and the fourth insulator piece 40P3. Let it be insulator piece 40P4. That is, the plurality of insulator pieces 40P include the first insulator piece 40P1, the second insulator piece 40P2, the third insulator piece 40P3, and the fourth insulator piece 40P4 as the insulator pieces 40P arranged adjacently in the circumferential direction.

  The first bus bar 100 has a first bus bar main body 100a and coil connection parts 121, 122, 123. The first busbar main body 100a extends along a plane orthogonal to the axial direction. In the present embodiment, the first busbar main body 100a extends in a polygonal line along the circumferential direction. In the present specification, the “polygonal shape along the circumferential direction” includes, for example, a shape along a side of a polygon inscribed in a virtual circle centered on the central axis J. In the present embodiment, the first busbar main body 100a has a shape along three adjacent sides of a dodecagon inscribed in a virtual circle centered on the central axis J.

  The first busbar main body 100a is supported by the insulator 40 outside the coil 34 in the radial direction. The first bus bar main body 100a is held by the bus bar holding section 45. The first busbar main body 100a has a first extending portion 101, a second extending portion 102, and a third extending portion 103.

  The first extending portion 101 is held across the first insulator piece 40P1 and the second insulator piece 40P2. The first extending portion 101 is supported from below by a support portion 45c of the first insulator piece 40P1 and a support portion 45b of the second insulator piece 40P2. Thereby, the first extending portion 101 is bridged from the support portion 45c of the first insulator piece 40P1 to the support portion 45b of the second insulator piece 40P2. That is, the first busbar main body 100a is bridged from the support portion 45c of the first insulator piece 40P1 to the support portion 45b of the second insulator piece 40P2.

  The first extending portion 101 extends in a first direction D1 orthogonal to the axial direction. In the present embodiment, the first direction D1 is a second extending direction in the first insulator piece 40P1, and is a first extending direction in the second insulator piece 40P2.

  One end of the first extending portion 101 in the first direction D1 is disposed between the pair of walls 47a and 47b of the first insulator piece 40P1. One end of the first extending portion 101 in the first direction D1 is defined by a pair of walls 47a and 47b of the first insulator piece 40P1 in a first orthogonal direction orthogonal to the axial direction and intersecting the first direction D1. Sandwiched. In the present embodiment, the first orthogonal direction is the second sandwiching direction of the first insulator piece 40P1, and is the first sandwiching direction of the second insulator piece 40P2. That is, in the present embodiment, the first orthogonal direction is orthogonal to both the axial direction and the first direction D1. One end of the first extending portion 101 in the first direction D1 is one end of the first extending portion 101 in the circumferential direction and one end of the first busbar main body 100a in the circumferential direction.

  One end of the first extending portion 101 in the first direction D1 is a widened portion 101a whose dimension in the first orthogonal direction increases. Therefore, a gap between the first extending portion 101 and the pair of wall portions 47a and 47b can be reduced between the pair of wall portions 47a and 47b. Thereby, the first bus bar 100 can be held on the insulator 40 more stably. An end face of one end of the first extending portion 101 in the first direction D1 is exposed to the space G1 of the first insulator piece 40P1.

  The second extension 102 is connected to the other end of the first extension 101 in the first direction D1. That is, one end of the first extending portion 101 in the first direction D1 which is the widened portion 101a is an end of the first extending portion 101 opposite to the side connected to the second extending portion 102. The other end of the first extending portion 101 in the first direction D1 is disposed between the pair of walls 46a and 46b of the second insulator piece 40P2. The other end of the first extending portion 101 in the first direction D1 is the other end of the first extending portion 101 in the circumferential direction.

  As described above, the first extending portion 101 is sandwiched between the pair of walls 47a and 47b of the first insulator piece 40P1 in the first orthogonal direction, and is also formed by the pair of walls 46a and 46b of the second insulator piece 40P2. Sandwiched.

  The second extending portion 102 is held across the second insulator piece 40P2 and the third insulator piece 40P3. The second extending portion 102 is supported from below by the support portion 45c of the second insulator piece 40P2 and the support portion 45b of the third insulator piece 40P3. Thereby, the second extending portion 102 is bridged from the support portion 45c of the second insulator piece 40P2 to the support portion 45b of the third insulator piece 40P3. That is, the first busbar main body 100a is bridged from the support portion 45c of the second insulator piece 40P2 to the support portion 45b of the third insulator piece 40P3.

  The second extending portion 102 extends from the other end of the first extending portion 101 in the first direction D1 in a second direction D2 orthogonal to the axial direction and intersecting the first direction D1. In the present embodiment, the second direction D2 is a second extending direction in the second insulator piece 40P2 and a first extending direction in the third insulator piece 40P3.

  One end of the second extending portion 102 in the second direction D2 is disposed between the pair of walls 47a and 47b of the second insulator piece 40P2. One end of the second extending portion 102 in the second direction D2 is defined by a pair of walls 47a and 47b of the second insulator piece 40P2 in a second orthogonal direction orthogonal to the axial direction and intersecting the second direction D2. Sandwiched. In the present embodiment, the second orthogonal direction is the second sandwiching direction of the second insulator piece 40P2, and is the first sandwiching direction of the third insulator piece 40P3. That is, in the present embodiment, the second orthogonal direction is orthogonal to both the axial direction and the second direction D2. One end of the second extending portion 102 in the second direction D2 is an end of the second extending portion 102 on one side in the circumferential direction. The third extension 103 is connected to the other end of the second extension 102 in the second direction D2. The other end of the second extending portion 102 in the second direction D2 is disposed between the pair of walls 46a and 46b of the third insulator piece 40P3. The other end of the second extending portion 102 in the second direction D2 is the other end of the second extending portion 102 in the circumferential direction.

  As described above, the second extending portion 102 is sandwiched between the pair of walls 47a and 47b of the second insulator piece 40P2 in the second orthogonal direction, and the pair of walls 46a and 46b of the third insulator piece 40P3. Sandwiched.

  The third extending portion 103 is held across the third insulator piece 40P3 and the fourth insulator piece 40P4. The third extending portion 103 is supported from below by the supporting portion 45c of the third insulator piece 40P3 and the supporting portion 45b of the fourth insulator piece 40P4. Thereby, the third extending portion 103 is bridged from the support portion 45c of the third insulator piece 40P3 to the support portion 45b of the fourth insulator piece 40P4. That is, the first busbar main body 100a is bridged from the support portion 45c of the third insulator piece 40P3 to the support portion 45b of the fourth insulator piece 40P4.

  The third extending portion 103 extends from the other end of the second extending portion 102 in the second direction D2 in a third direction D3 orthogonal to the axial direction and intersecting the second direction D2. In the present embodiment, the third direction D3 is a second extending direction in the third insulator piece 40P3 and a first extending direction in the fourth insulator piece 40P4. The third direction D3 is a direction crossing the first direction D1.

  One end of the third extension 103 in the third direction D3 is disposed between the pair of walls 47a and 47b of the third insulator piece 40P3. One end of the third extending portion 103 in the third direction D3 is defined by a pair of walls 47a and 47b of the third insulator piece 40P3 in a third orthogonal direction orthogonal to the axial direction and intersecting the third direction D3. Sandwiched. In the present embodiment, the third orthogonal direction is the second sandwiching direction of the third insulator piece 40P3 and the first sandwiching direction of the fourth insulator piece 40P4. That is, in the present embodiment, the third orthogonal direction is orthogonal to both the axial direction and the third direction D3. One end of the third extending portion 103 in the third direction D3 is an end of the third extending portion 103 on one side in the circumferential direction. The other end of the third extension 103 in the third direction D3 is disposed between the pair of walls 46a and 46b of the fourth insulator piece 40P4. The other end of the third extending portion 103 in the third direction D3 is the other end of the third extending portion 103 in the circumferential direction, and is the other end of the first busbar main body 100a on the other circumferential side.

  As described above, the third extending portion 103 is sandwiched between the pair of walls 47a and 47b of the third insulator piece 40P3 in the third orthogonal direction, and is formed on the pair of walls 46a and 46b of the fourth insulator piece 40P4. Sandwiched.

  The other end of the third extending portion 103 in the third direction D3 is a widened portion 103a whose dimension in the third orthogonal direction increases. Therefore, a gap between the third extension 103 and the pair of wall portions 46a and 46b can be reduced between the pair of wall portions 46a and 46b. Thereby, the first bus bar 100 can be held on the insulator 40 more stably. The end surface of the other end of the third extension 103 in the third direction D3 is exposed to the space G1 of the fourth insulator piece 40P4.

  Each extending portion is positioned between the pair of wall portions along the wall surface of each wall portion. Thereby, the first bus bar 100 is positioned and held by the insulator 40.

  The first corner 111, which is the corner where the first extension 101 and the second extension 102 are connected, is disposed in the space G1 of the second insulator piece 40P2. No walls are provided on both sides in the width direction of the first corner 111, and the first corner 111 is not sandwiched between the walls.

  For example, when a pair of walls is provided on both sides in the width direction of the first corner, the pair of walls bends and extends along the first corner. In this case, the first corner is fitted between the bent corners of the pair of walls. However, if an error occurs in the dimensions of the first bus bar due to an error in the length of the first extended portion or the length of the second extended portion, the first corner is bent with respect to the bent corner of the pair of walls. In some cases, the positions of the portions are shifted, and the first corner portion cannot be fitted between the wall portions. Therefore, the first bus bar may not be arranged between the pair of wall portions in some cases.

  On the other hand, according to the present embodiment, the first corner 111 is disposed in the space G1. Therefore, even if an error occurs in the dimensions of the first bus bar 100, the first corner 111 can be displaced by the width of the space G1. Thereby, even if the position of the first corner portion 111 is shifted due to a dimensional error, the first bus bar 100 can be arranged between the respective wall portions. Therefore, the first bus bar 100 can be easily arranged, and the assemblability of the motor 10 can be improved. As described above, according to the present embodiment, the motor 10 having a structure that can improve the assemblability is obtained.

  Further, according to the present embodiment, the holding member that holds the first bus bar 100 is the insulator 40. Therefore, the first bus bar 100 can be held using the insulator 40 without separately providing a holding member for holding the first bus bar 100. Therefore, the number of parts of the motor 10 can be reduced, and the assemblability can be further improved.

  Further, according to the present embodiment, the first busbar main body 100a is supported by the insulator 40 on a radially outer side than the coil 34. Therefore, for example, it is easier to secure a large area for holding the first busbar main body 100a in the insulator 40 than when the first busbar main body 100a is supported by the insulator 40 radially inward of the coil 34. Therefore, the insulator 40 can easily hold the first bus bar 100. The first busbar main body 100a extends in a polygonal line along the circumferential direction. Therefore, it is easy to arrange the first busbar main body 100a at a portion radially outside the coil 34 of the insulator 40.

  The first corner portion 111 is disposed at a position overlapping the second insulator piece 40P2 when viewed along the axial direction. Therefore, the vicinity of the first corner 111 is easily supported by the second insulator piece 40P2. Thereby, the first bus bar 100 can be stably held by the insulator 40.

  As shown in FIG. 10, the vertex of the first corner portion 111 faces outward in the radial direction. The insulator 40 is not disposed on both sides of the first corner 111 in the radial direction. The first corner 111 is exposed outside the insulator 40 when the insulator 40 is viewed from the outside in the radial direction. The first corner portion 111 is exposed outside the insulator 40 when the insulator 40 is viewed from the radial inside. The first corner portion 111 overlaps the concave portion 45d when viewed along the axial direction.

  For example, when the first bus bar 100 is manufactured by bending a linearly extending plate member, the bent first corner 111 may be bent, and a part of the first corner 111 may buckle in the axial direction. . Therefore, when the first corner 111 is supported from below, the buckled portion may cause the first corner 111 to rise. As a result, the first bus bar may be lifted, and the first bus bar may not be accurately arranged.

  On the other hand, according to the present embodiment, even when a part of the first corner portion 111 buckles, the buckled portion can be released by the concave portion 45d. Therefore, the first bus bar 100 can be prevented from floating. Therefore, the first bus bar 100 can be accurately arranged.

  As shown in FIG. 3, the second corner 112, which is the corner where the second extension 102 and the third extension 103 are connected, is disposed in the space G1 of the third insulator piece 40P3. No walls are provided on both sides of the second corner 112 in the width direction, and the second corner 112 is not sandwiched between the walls.

  As described above, in the present embodiment, the first corner portion 111 and the second corner portion 112 are provided as two corner portions in one first bus bar main body 100a. In this case, for example, when a pair of walls are provided on both sides in the width direction of each corner, it is necessary to match both of the corners with each of the bent corners of the pair of walls. Therefore, when an error occurs in the dimensions of the first bus bar, the first bus bar may not be able to be fitted between the wall portions.

  On the other hand, according to the present embodiment, since the first corner 111 and the second corner 112 are respectively disposed in the space G1, the misalignment of the first corner 111 and the second corner 112 is achieved. Is acceptable. Thus, even if the position of the first corner 111 and the position of the second corner 112 are shifted from each other due to a dimensional error, the first bus bar 100 can be arranged between the walls. Therefore, the effect that the first bus bar 100 in the present embodiment can be easily arranged between the wall portions is particularly usefully obtained when two or more corner portions are provided in one first bus bar main body 100a.

  Further, according to the present embodiment, as described above, the distance between the pair of wall portions 46a and 46b and the distance between the pair of wall portions 47a and 47b increase in the upper portion. Therefore, each extending portion of the first busbar main body 100a is easily inserted between the wall portions from above and is easily fitted. Therefore, according to the present embodiment, the first bus bar 100 can be more easily arranged, and the assemblability of the motor 10 can be further improved.

  The first bus bar main body 100a has intermediate portions 101b, 102b, and 103b. The intermediate portions 101b, 102b, 103b are arranged in the space G2. The intermediate portion 101b is a part of the first extending portion 101, and includes a portion supported by the support portion 45c of the first insulator piece 40P1 and a support portion 45b of the second insulator piece 40P2 in the first busbar main body 100a. It is a part located between the part to be supported.

  The intermediate portion 102b is a part of the second extending portion 102, and is formed on a portion of the first busbar main body 100a supported by the support portion 45c of the second insulator piece 40P2 and a support portion 45b of the third insulator piece 40P3. It is a part located between the part to be supported.

  The intermediate portion 103b is a part of the third extending portion 103, and includes a portion supported by the support portion 45c of the third insulator piece 40P3 and a support portion 45b of the fourth insulator piece 40P4 in the first busbar body 100a. It is a part located between the part to be supported.

  The insulator 40 is not disposed on both radial sides of the intermediate portions 101b, 102b, and 103b. When the insulator 40 is viewed from the outside in the radial direction, the intermediate portions 101b, 102b, and 103b are exposed outside the insulator 40. When the insulator 40 is viewed from the radial inside, the intermediate portions 101b, 102b, and 103b are exposed outside the insulator 40.

  The coil connection parts 121, 122, 123 extend from the first busbar main body 100a. The coil connection part 121 is connected to the intermediate part 101b. The coil connection part 122 is connected to the intermediate part 102b. The coil connection part 123 is connected to the intermediate part 103b. The coil connection portion 121 has a hook shape that protrudes radially inward from the center of the intermediate portion 101b in the first direction D1 and curves to the other side in the circumferential direction.

  A coil lead wire 34b is sandwiched between the intermediate portion 101b and the coil connection portion 121. That is, the coil lead wire 34b is sandwiched between the first bus bar main body 100a and the coil connection portion 121. Although not shown, the coil connection portion 122 is caulked radially outward and grips the coil lead wire 34b with the intermediate portion 101b. The intermediate portion 101b and the coil connection portion 121 are fixed to the coil lead wire 34b by, for example, welding. As a result, the coil lead wire 34b is connected to the first bus bar main body 100a and the coil connection portion 121. The coil connection part 122 and the coil connection part 123 are the same as the coil connection part 121 except that the connected middle part is different.

  According to the present embodiment, the intermediate portions 101b, 102b, and 103b are arranged in the space G2, and the coil connection portions 121, 122, and 123 are connected to the intermediate portions 101b, 102b, and 103b. Therefore, in the operation of caulking the coil connection portions 121, 122, 123, and the operation of welding the coil connection portions 121, 122, 123 and the first busbar body 100a to the coil lead wire 34b, a space for working is provided. It can be secured by the part G2. This makes it easy to perform each operation. In addition, when performing the welding operation, the insulator 40 holding the first busbar main body 100a can be prevented from being damaged by heat. Therefore, according to the present embodiment, the motor 10 having a structure that can easily connect the coil connection parts 121, 122, 123 and the coil lead wire 34b and that can prevent the insulator 40 from being damaged can be obtained.

  Further, according to the present embodiment, the coil connection portions 121, 122, and 123 are connected to the radially inner edge of the first busbar main body 100a. Accordingly, when the first busbar main body 100a is held by the insulator 40 radially outside the coil 34 as described above, the coil lead wire 34b is easily connected to the coil connection portions 121, 122, and 123.

  Further, according to the present embodiment, the intermediate portions 101b, 102b, and 103b are intermediate portions in the respective extending portions that are bridged between the supporting portions. For this reason, the intermediate portions 101b, 102b, and 103b are arranged away from the insulator 40 in the upper direction. This makes it easier to perform the above-described caulking operation and welding operation. In addition, it is possible to further suppress the heat generated by welding from being transmitted from the first bus bar main body 100a to the insulator 40, and to further suppress damage to the insulator 40.

  As shown in FIG. 1, the bearing holder 50 is arranged above the stator 30. The bearing holder 50 has an annular shape centered on the central axis J. The outer peripheral surface of the bearing holder 50 is fixed to the inner peripheral surface of the housing 11. A bearing 52 is held on the inner peripheral surface of the bearing holder 50. The bearing holder 50 has a through hole 50a that penetrates the bearing holder 50 in the axial direction. The coil lead wire 34a is passed through the through hole 50a.

  The busbar holder 60 is arranged above the bearing holder 50. The bus bar holder 60 has a through hole 61 that passes through the bus bar holder 60 in the axial direction. The second bus bar 70 has a second bus bar main body 71, a connection terminal 72, and a grip portion 73. The second bus bar main body 71 is embedded in the bus bar holder 60. The grip portion 73 protrudes into the through-hole 61 and grips the coil lead wire 34a. The connection terminal 72 is connected to the control device 80.

  The control device 80 is arranged above the bus bar unit 90. Control device 80 is electrically connected to second bus bar 70 via connection terminal 72. The control device 80 is a power supply that supplies electric power to the stator 30 via the second bus bar 70. The control device 80 has a board or the like provided with an inverter circuit for controlling the power supplied to the stator 30.

  The present invention is not limited to the above-described embodiment, but may employ other configurations described below. The number of the first bus bars is not particularly limited as long as it is one or more. The number of corners in one first busbar body is not particularly limited as long as it is one or more. That is, the first busbar body may have only the first corner as the corner, or may have another corner in addition to the first corner and the second corner. Further, the widened portion may be disposed between the wall portions of the insulator piece where the first corner portion where the first extended portion and the second extended portion are connected is disposed. For example, in the above-described embodiment, the widened portion 101a of the first extending portion 101 may be arranged between the walls 46a and 46b of the second insulator piece 40P2. In this case, the first extending portion 101 is supported, for example, only by the second insulator piece 40P2. In this case, the length of the first extending portion 101 is shorter than the length of the second extending portion 102, for example. The widened portion may be provided at a portion other than the end of each extending portion. The first bus bar may not have the widened portion.

  The first direction in which the first extension portion extends and the second direction in which the second extension portion extends are not particularly limited as long as they are orthogonal to the axial direction and intersect with each other. The first orthogonal direction need not be orthogonal to the first direction as long as the direction is orthogonal to the axial direction and intersects with the first direction. The second orthogonal direction need not be orthogonal to the second direction as long as the direction is orthogonal to the axial direction and intersects the second direction. The third orthogonal direction need not be orthogonal to the third direction as long as the direction is orthogonal to the axial direction and intersects with the third direction. The first bus bar may have a plate surface parallel to the axial direction. The first bus bar may be a phase bus bar. The method for manufacturing the first bus bar is not limited. The first bus bar may be manufactured by directly punching the outer shape of the first bus bar 100 from the plate member.

  In the insulator, the plurality of insulator pieces may be connected to each other. The holding member that holds the first bus bar is not particularly limited, and may not be an insulator. For example, a holding member for holding the first bus bar may be provided separately from the insulator. The number of walls is not particularly limited. The wall may not be provided. The number of support portions is not particularly limited. The support section may not be provided. The recess may not be provided. The shape of the holding portion is not particularly limited. The opening width of the first opening in the holding groove may vary in the axial direction. The lower part of the bottom surface of the holding groove may not be inclined. The shape of the inner edge of the holding groove is not particularly limited. The coil lead wire held in the holding groove may be an end on the winding end side of a conductive wire forming the coil.

  Each space may include a space around the wall in addition to the space between the walls. Each space portion may include, for example, a space radially outside of each wall portion, or may include a space radially inside of each wall portion. That is, for example, each corner portion arranged in each space portion may be provided to protrude radially outward from each pair of wall portions, or may be provided radially inward than each pair of wall portions. Is also good. Each intermediate portion disposed in each space portion may be provided so as to protrude radially outward from each pair of wall portions, or may be provided radially inward from each pair of wall portions.

  The use of the motor of the above-described embodiment is not particularly limited. In addition, the above-described configurations can be appropriately combined as long as they do not conflict with each other.

  DESCRIPTION OF SYMBOLS 10 ... Motor, 20 ... Rotor, 21 ... Shaft, 30 ... Stator, 31 ... Stator core, 32 ... Core back, 33 ... Teeth, 34 ... Coil, 34b ... Coil lead-out wire (winding end side lead wire), 34e ... Outer periphery lead wire , 34f: corner portion, 40: insulator, 41: cylindrical portion, 44: outside protruding portion (axially protruding portion), 48: holding portion, J: central axis

Claims (6)

A rotor having a shaft disposed along a central axis;
A stator having a coil and facing the rotor via a gap in a radial direction;
With
The stator is
A stator core having a core back extending in a circumferential direction and a plurality of teeth extending radially from the core back;
An insulator mounted on the stator core,
A plurality of coils respectively attached to the plurality of teeth via the insulator,
Has,
The insulator,
A cylindrical portion through which the teeth are passed and the coil is mounted,
An axially protruding portion that protrudes axially one side from an axially one side edge of the radially one end of the cylindrical portion,
A pressing portion protruding from the axial protruding portion to the other side in the radial direction,
Has,
The axial protruding portion extends to one side in the circumferential direction from the cylindrical portion,
The pressing portion is disposed on one side in the circumferential direction than the cylindrical portion,
The coil is configured by winding a conductive wire,
From the coil, a winding end side conductor that is an end on the winding end side of the conductor extends to one side in the axial direction,
The motor, wherein the winding end-side conductive wire is disposed between the pressing portion and the coil on the other circumferential side of the pressing portion when viewed along the axial direction. The winding end-side conductor is disposed radially between the outermost conductor wound around the outermost periphery of the conductors constituting the coil and the axial protrusion,
2. The motor according to claim 1, wherein a distance between an end on one circumferential side of the outermost conductor and the pressing portion when viewed along the axial direction is smaller than an outer diameter of the winding end-side conductor. 3. .   The motor according to claim 1, wherein the holding portion extends in an axial direction. The outermost conductor wound around the outermost conductor among the conductors constituting the coil has a rectangular frame shape with rounded corners,
4. The motor according to claim 3, wherein the other end in the axial direction of the pressing portion is disposed on the other axial side with respect to the one corner in the axial direction of the outermost conductor. 5.   The end on the other side in the axial direction of the pressing portion is disposed at the same position in the axial direction as the surface on one side in the axial direction of the teeth, or is disposed on one side in the axial direction relative to the surface on one side in the axial direction of the teeth. The motor according to claim 3.   The motor according to any one of claims 2 to 5, wherein an end of the pressing portion on one axial side is disposed on one axial side of the coil.

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