WO2018180641A1 - Motor - Google Patents

Abstract

In one embodiment of a motor according to the present invention, a first busbar is provided with: a first busbar main body which extends along a plane orthogonal to an axial direction; and a coil connection part which extends from the first busbar main body. A conductor wire extending from a coil is sandwiched between the first busbar main body and the coil connection part. A holding member is provided with: a support part which supports the first busbar main body from one side in the axial direction; a pair of first wall parts disposed side by side in a first prescribed direction, which is orthogonal to the axial direction, and intersects the direction in which the first busbar main body extends, said pair of first wall parts sandwiching the first busbar main body in the first prescribed direction; and a pair of second wall parts disposed side by side in a second prescribed direction, which is orthogonal to the axial direction, and intersects the direction in which the first busbar main body extends, said pair of second wall parts sandwiching the first busbar main body in the second prescribed direction. A space is provided between the first wall parts and the second wall parts. The first busbar main body is provided with an intermediate part which is disposed in the space. The coil connection part is connected to the intermediate part.

Description

motor

The present invention relates to a motor.

Rotating electric machines with bus bars are known. For example, Patent Document 1 describes a rotating electric machine including a power collection and distribution cable as a bus bar.

JP 2009-247039 A

By the way, in the bus bar as described above, a coil connecting portion connected to a conducting wire extending from the coil is provided. A coil connection part is connected with a conducting wire by welding after being crimped, for example. However, depending on how the bus bars are arranged with respect to a holding member such as an insulator, there are cases where it is difficult to perform crimping and welding. Moreover, the holding member may be damaged by the heat at the time of welding.

In view of the above circumstances, an object of the present invention is to provide a motor having a structure that can easily connect a coil connecting portion and a conductive wire extending from a coil and can prevent a holding member from being damaged.

One aspect of the motor of the present invention includes a rotor having a shaft disposed along a central axis, a stator having a coil and facing the rotor via a gap in the radial direction, and one axial direction of the stator. A first bus bar electrically connected to the stator and a holding member that holds the first bus bar; The first bus bar includes a first bus bar main body extending along a plane orthogonal to the axial direction, and a coil connection portion extending from the first bus bar main body. A conducting wire extending from the coil is sandwiched between the first bus bar main body and the coil connecting portion. The conducting wire is connected to the first bus bar main body and the coil connecting portion. The holding member is arranged side by side in a first predetermined direction that is a direction orthogonal to the axial direction and intersecting a direction in which the first bus bar main body extends, and a support portion that supports the first bus bar main body from the other side in the axial direction. A pair of first wall portions sandwiching the first bus bar main body in the first predetermined direction and a second predetermined direction that is orthogonal to the axial direction and intersects the direction in which the first bus bar main body extends. And a pair of second wall portions sandwiching the first bus bar main body in the second predetermined direction. A space portion is provided between the first wall portion and the second wall portion. The first bus bar main body has an intermediate portion disposed in the space portion. The coil connection part is connected to the intermediate part.

According to one aspect of the present invention, there is provided a motor having a structure that can easily connect a coil connecting portion and a conductive wire extending from a coil and suppress damage to a holding member.

FIG. 1 is a cross-sectional view showing the motor of this embodiment. FIG. 2 is a perspective view showing the stator and the first bus bar of the present embodiment. FIG. 3 is a view of a part of the stator and the first bus bar of this embodiment as 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 as viewed from one side in the circumferential direction. FIG. 6 is a perspective view showing the conducting wire holding part of the present embodiment. FIG. 7 is a view showing the lead 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 this embodiment as viewed from above. FIG. 9 is a view 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 as shown in each figure is a vertical direction in which the positive side is the upper side and the negative side is the lower side. A central axis J shown as appropriate in each drawing is an imaginary line parallel to the Z-axis direction and extending 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 around the central axis J is simply referred to as “radial direction”. The circumferential direction centered on is simply referred to as the “circumferential direction”. In each drawing, the circumferential direction is appropriately indicated by an arrow θ.

Also, 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, the side proceeding counterclockwise when viewed from the upper side to the lower side in the circumferential direction, that is, the side proceeding in the direction of the arrow θ is referred to as “one side in the circumferential direction”. The side proceeding clockwise as viewed from the upper side to the lower side in the circumferential direction, that is, the side proceeding in the direction opposite to the direction of the arrow θ is referred to as “the other circumferential side”.

The vertical direction, the upper side, and the lower side are simply names for explaining the relative positional relationship of each part, and the actual layout relationship is a layout relationship other than the layout relationship indicated by these names. May be.

As shown in FIGS. 1 and 2, the motor 10 of this 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 includes 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 at the bottom of the lower side.

The rotor 20 includes a shaft 21, a rotor core 22, and a magnet 23. The shaft 21 is disposed along the central axis J. The shaft 21 is rotatably supported by bearings 51 and 52. The rotor core 22 has an annular shape that is 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 on the lower side of the rotor core 22. The bearing 52 rotatably supports the shaft 21 on the upper side of the rotor core 22. The bearings 51 and 52 are ball bearings.

The stator 30 faces the rotor 20 via a gap in the radial direction. The stator 30 surrounds the rotor 20 on the radially outer side of the rotor 20. The stator 30 includes a stator core 31, a plurality of coils 34, and an insulator 40. That is, the motor 10 includes a stator core 31, a plurality of coils 34, and an insulator 40. 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 plurality of teeth 33 extend in the radial direction from the core back 32. More specifically, the plurality of 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 along the circumferential direction. For example, twelve teeth 33 are provided.

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

The plurality of coils 34 are respectively attached to the plurality of teeth 33 via the insulator 40. The coil 34 is configured by winding a conductive wire around a tooth 33 via an insulator 40. For example, twelve coils 34 are provided.

As shown in FIG. 4, in this embodiment, the coil 34 is configured by winding a conducting wire in a rectangular frame shape with rounded corners. The outer diameter of the coil 34 becomes the maximum in the outermost periphery conducting wire 34e wound around the outermost periphery among the conducting wires constituting the coil 34. The outermost periphery conducting wire 34 e is a portion located on the outer side in the radial direction of the coil 34. The outermost peripheral conducting wire 34e is disposed radially inward from the radially outer end of the coil 34. The outermost periphery conducting wire 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 34 a and 34 b are conductive wires extending upward from the coil 34 and are ends of the conductive wires constituting the coil 34. The coil lead wire 34 a is an end portion on the winding start side of the conducting wire constituting the coil 34. The coil lead wire 34 b is an end portion on the winding end side of the conducting wire constituting the coil 34. The coil lead wire 34 a is electrically connected to the second bus bar 70. The coil lead wire 34 b is electrically connected to the first bus bar 100.

2 and 3, the insulator 40 is attached to the stator core 31. In this 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 shape of the plurality of insulator pieces 40P is the same as each other. As shown in FIG. 4, the insulator piece 40 </ b> P is configured, for example, by connecting two separate members in the axial direction.

The insulator piece 40P includes 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 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.

The cylinder portion 41 has a cylindrical shape extending in the radial direction. In more detail, the cylinder part 41 is a rectangular cylinder shape. As shown in FIG. 5, the teeth 33 are passed through the cylindrical portion 41. A 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. As a result, the coil 34 is attached to the cylindrical portion 41. As shown in FIG. 4, the inner protruding portion 42 protrudes upward from the upper edge portion of the radially inner end portion of the cylindrical portion 41. The inner protruding portion 42 is disposed on the upper side of the umbrella portion 33f. In addition, the cylinder part 41 does not need to cover a part of outer peripheral surface of the teeth 33. FIG. In this case, for example, a gap may be provided between two separate members that constitute the insulator piece 40P, and the outer peripheral surface of the teeth 33 may be exposed to the outside of the cylindrical portion 41 through the gap.

The lead wire holding portion 43 extends upward from a portion on the other circumferential side of the inner protruding portion 42. In the present embodiment, the conducting wire holding portion 43 extends upward from the end portion on the other circumferential side of the inner protruding portion 42. Thereby, the conducting wire holding portion 43 is connected to the radially inner end portion of the cylindrical portion 41 via the inner protruding portion 42 and protrudes above the cylindrical portion 41. The conducting wire holding portion 43 has a substantially quadrangular prism shape. The dimension of the conducting wire holding portion 43 in the circumferential direction decreases from the lower side toward the upper side. The conducting wire holding portion 43 may extend upward from a portion on one side in the circumferential direction of the inner protruding portion 42. Moreover, the conducting wire holding portion 43 may extend upward from an end portion on one side in the circumferential direction of the inner protruding portion 42.

As shown in FIG. 6, the conducting wire holding part 43 has a holding groove part 43a. The coil lead wire 34a is held in the holding groove 43a. The holding groove 43a is recessed radially inward from the radially outer surface of the conductor 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 outward in the radial direction. 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 opened. The second opening 43c has a substantially circular shape. The lower end of the holding groove 43a is closed.

In the cross section orthogonal to the axial direction, the inner edge of the holding groove 43a is arcuate. 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 over the entire axial direction in a state where the coil lead wire 34a is not held, and is smaller than the outer diameter of the coil lead wire 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 FIG. 6 and FIG. 7, the lower part of the bottom surface of the holding groove 43a is an inclined part 43d positioned radially outward as it goes downward. The lower end portion of the inclined portion 43 d is connected to the radially outer surface of the conductor holding portion 43.

The coil lead wire 34a held in 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 the lower portion of the first opening 43b. The second portion 34d is connected to the distal end side, that is, the upper side of the first portion 34c. The second portion 34d is a portion that protrudes from the second opening 43c to the outside of the holding groove 43a through the inside of the holding groove 43a.

As described above, in the state where the coil lead wire 34a is not held, the opening width of the first opening 43b is smaller than the outer diameter of the coil lead wire 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 The opening width of 43b partially expands. Thereby, the edge parts 43e and 43f of the circumferential direction both sides of the 1st opening part 43b contact the 1st part 34c in the state elastically deformed, and pinch | interpose the 1st part 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. As a result, the coil lead wire 34a is guided upward along the holding groove portion 43a to position the coil lead wire 34a, and the coil is provided by the gap between the inner edge of the second opening 43c and the coil lead wire 34a. The position of the leader line 34a can be finely adjusted. Therefore, it is easy to connect the coil lead wire 34a to other members. In this embodiment, the other member is the second bus bar 70.

In addition, the opening width of the first opening 43b is widened at the portion where the first portion 34c is inserted and in the vicinity thereof to be the same as the outer diameter of the first portion 34c, but the first portion is the other portion. It is smaller than the outer diameter of 34c. Accordingly, the opening width of the first opening 43b is smaller than the outer diameter of the coil lead wire 34a at the upper end of the holding groove 43a. Therefore, the second portion 34d accommodated in the holding groove 43a can be prevented from coming out of the holding groove 43a from the first opening 43b.

Further, the upper end of the first opening 43b is connected to the second opening 43c. Therefore, an operator who holds the coil lead wire 34a in the holding groove portion 43a first tilts the coil lead wire 34a extending above the lead wire holding portion 43 radially inside the lead wire holding portion 43 to the inside in the radial direction. The coil lead wire 34a can be easily held in the holding groove 43a by being pushed into the holding groove 43a from the portion 43b.

As described above, according to the present embodiment, the motor 10 having a structure that can easily and firmly hold the coil lead wire 34a and finely adjust the position of the coil lead wire 34a can be 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 it goes downward. Therefore, as shown in FIG. 7, the coil lead wire 34a can be along the inclined portion 43d. Accordingly, when the coil lead wire 34a is held in the holding groove portion 43a, the coil lead wire 34a does not need to be largely bent, and the coil lead wire 34a is easily held in the holding groove portion 43a.

Further, according to the present embodiment, the inner edge of the holding groove 43a has an arc shape in the 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 accommodated in the holding groove portion 43a. Therefore, the second portion 34d can be stably held inside the holding groove 43a, and the coil lead wire 34a can be easily positioned with high accuracy.

As shown in FIG. 4, the outer protrusion 44 protrudes upward from the upper edge of the radially outer end of the cylindrical portion 41. The outer projecting portion 44 extends to one side in the circumferential direction from the cylindrical portion 41. More specifically, the outer protruding portion 44 extends on both sides in the circumferential direction with respect to the cylindrical portion 41. In the present embodiment, the outer protruding portion 44 is a part of a flange portion that extends outward from the entire circumference of the radially outer end of the cylindrical portion 41.

The bus bar holding portion 45 includes a base portion 45a, support portions 45b and 45c, a pair of wall portions 46a and 46b, and a pair of wall portions 47a and 47b. That is, the insulator 40 includes a base portion 45a, support portions 45b and 45c, a pair of wall portions 46a and 46b, and a pair of wall portions 47a and 47b. The base 45 a 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 45 a is arranged 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 side in the circumferential direction of the upper end portion of the base portion 45a. As shown in FIG. 8, the support portion 45 b is arranged on one side in the circumferential direction from the circumferential center of the cylinder portion 41. The support part 45b extends linearly in a direction orthogonal to the axial direction. The direction in which the support portion 45b extends is a direction located on the inner side in the radial direction in which the teeth 33 to which the insulator pieces 40P are attached extend toward the 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 extending direction”.

The support portion 45b extends from a portion of the upper end portion of the base portion 45a closer to one side in the circumferential direction to an end portion on one side in the circumferential direction. As shown in FIG. 9, the cross-sectional shape orthogonal to the 1st extending | stretching direction of the support part 45b is a substantially trapezoid shape whose upper base is smaller than a lower base. In the direction orthogonal to the first stretching direction, both edge portions of the upper end portion of the support portion 45b are rounded. The support part 45b supports the 1st bus-bar main body 100a mentioned later from the lower side.

As shown in FIG. 4, the support portion 45 c protrudes upward from a portion on the other circumferential side of the upper end portion of the base portion 45 a. As shown in FIG. 8, the support portion 45 c is disposed on the other circumferential side of the cylindrical portion 41 with respect to the circumferential center. The support part 45c extends linearly in a direction intersecting the first extending direction of the support part 45b among the directions orthogonal to the axial direction. The direction in which the support portion 45c extends is a direction located on the inner side in the radial direction in which the teeth 33 to which the insulator pieces 40P are attached 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 extending direction”.

The support portion 45c extends from the central portion in the circumferential direction to the end portion on the other circumferential side in the upper end portion of the base portion 45a. Although illustration is omitted, the cross-sectional shape orthogonal to the second extending direction of the support portion 45c is the same as that of the support portion 45b, for example. The support part 45c supports the 1st bus-bar main body 100a mentioned later from the lower side. The extending length of the support portion 45c is larger than the extending length of the support portion 45b.

As shown in FIG. 4, the wall 46a protrudes upward from the radially inner edge of the portion on the one circumferential side of the upper end of the base 45a. The wall part 46b protrudes upward from the radial outer edge part in the part of the circumferential direction one side among the upper end parts of the base part 45a. The wall part 46a is arrange | positioned at the radial inside of the support part 45b. The wall part 46b is arrange | positioned at the radial direction outer side of the support part 45b. The pair of wall portions 46a and 46b extend in the first extending direction. As shown in FIG. 8, the extending length of the wall portion 46a and the extending length of the wall portion 46b are substantially the same as the extending length of the support portion 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 stretching direction. A direction in which the pair of wall portions 46a and 46b are arranged is a first clamping direction. In the present embodiment, the first clamping direction is a direction orthogonal to both the axial direction and the first stretching direction. The pair of wall portions 46a and 46b sandwich the support portion 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 on the side of the support portion 45b in the wall portion 46a extends in the first extending direction. A wall surface 46d on the support portion 45b side in the wall portion 46b extends in the first extending direction. The wall surface 46c and the wall surface 46d are opposed to each other through a gap. That is, the pair of wall portions 46a and 46b have wall surfaces 46c and 46d that face each other with a gap therebetween and extend in the first extending direction.

As shown in FIG. 9, the distance L2 between the upper portion of the wall surface 46c and the upper portion of the wall surface 46d is greater than the distance L1 between the lower portion of the wall surface 46c and the lower portion 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 circumferential side portion. The wall portion 47a is disposed on the radially inner side of the portion on one side in the circumferential direction of the support portion 45c. The wall portion 47a is not arranged on the radially inner side of the portion on the other circumferential side of the support portion 45c. The wall portion 47b protrudes upward from the radially outer edge portion of the upper end portion of the base portion 45a on the other circumferential side portion. The wall part 47b is arrange | positioned at the radial direction outer side of the support part 45c.

The pair of wall portions 47a and 47b extend in the second extending direction. As shown in FIG. 8, the length of the wall 47a is smaller than the length of the support 45c. The length that the wall 47b extends is greater than the length that the walls 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 it is symmetrical 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 stretching direction. A direction in which the pair of wall portions 47a and 47b are arranged is a second clamping direction. In the present embodiment, the second clamping direction is a direction orthogonal to both the axial direction and the second stretching direction. The pair of wall portions 47a and 47b sandwich the support portion 45c in the second clamping direction. That is, the support portion 45c is disposed between the pair of wall portions 47a and 47b. A wall surface 47c on the support portion 45c side of the wall portion 47a extends in the second extending direction. A wall surface 47d on the side of the support portion 45c in the wall portion 47b extends in the second extending direction. The wall surface 47c and the wall surface 47d oppose each other via a gap. That is, the pair of wall portions 47a and 47b have wall surfaces 47c and 47d that face each other with a gap and extend in the second extending direction. Although illustration is omitted, the distance between the pair of wall portions 47a and 47b is increased in the upper portion, similarly to the wall portions 46a and 46b.

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

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

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

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

As shown in FIG. 10, since the support part 45b and the support part 45c are spaced apart from each other in the circumferential direction via the space part G1, the support part 45b is recessed downward between the support part 45c and the support part 45c. A recess 45d is provided. That is, the insulator 40 has a recess 45d. The recess 45d opens on both sides in the radial direction. The inside of the recess 45d is included in the space G1, for example.

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

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

The coil lead wire 34 b is disposed between the pressing portion 48 and the coil 34 on the other circumferential side of the pressing portion 48 as viewed along the axial direction. Therefore, the coil lead wire 34b can be easily sandwiched between the pressing portion 48 and the coil 34, and the coil lead wire 34b can be prevented from moving away from the coil 34. Thereby, it is easy to connect the coil lead wire 34 b, which is the end portion on the winding end side, of the conducting wire constituting the coil 34 to the first bus bar 100. Further, since the coil lead wire 34b can be pressed using the coil 34, the shape of the pressing 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 having a simple structure and capable of suppressing 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. As viewed along the axial direction, the distance between the end portion on one side in the circumferential direction of the outermost periphery conducting wire 34e and the pressing portion 48 is smaller than the outer diameter of the coil lead wire 34b. For this reason, it is possible to suppress the coil lead wire 34b from coming out to the one side in the circumferential direction from between the outermost periphery conducting wire 34e and the pressing portion 48. Therefore, it is possible to further suppress the coil lead wire 34b from moving away from the coil 34.

As shown in FIG. 4, the pressing portion 48 extends in the axial direction. Thereby, the dimension of the axial direction of the part supported by the pressing part 48 among the coil leader lines 34b can be enlarged. Therefore, it is possible to further suppress movement of the coil lead wire 34b 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 portion of the pressing portion 48 is disposed below the upper corner portion 34f of the outermost peripheral conducting wire 34e. The portion below the corner portion 34f in the outermost periphery conducting wire 34e is a portion extending in the axial direction, and is an end portion on one side in the circumferential direction of the outermost periphery conducting wire 34e. Therefore, by extending the pressing portion 48 below the corner portion 34f, the end portion on one side in the circumferential direction of the outermost peripheral conducting wire 34e and a part of the pressing portion 48 are opposed to each other in a direction orthogonal to the axial direction. Can do. Thereby, it can suppress more reliably that the coil leader wire 34b pulls out from the circumferential direction one side between the edge part of the circumferential direction one side of the outermost periphery conducting wire 34e, and the holding | suppressing part 48 to the circumferential direction one side.

As shown in FIG. 5, the lower end portion of the pressing portion 48 is disposed at the same position as the upper surface of the teeth 33 in the axial direction or above the upper surface of the teeth 33. Therefore, it can suppress that the holding | suppressing part 48 extends too much below. Thereby, when winding a conducting wire and producing the coil 34, it can suppress that a conducting wire interferes with the holding | suppressing part 48. FIG. Therefore, the coil 34 is easy to produce. In the present embodiment, 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.

The upper end of the pressing portion 48 is disposed above the coil 34. Therefore, the axial dimension of the pressing portion 48 can be increased, and the axial dimension of the portion of the coil lead wire 34b supported by the pressing portion 48 can be increased. Therefore, it is possible to further suppress movement of the coil lead wire 34b by the pressing portion 48. Moreover, it is easy to guide the coil lead wire 34b to the upper side along the pressing portion 48, and it is easy to position the coil lead wire 34b with higher accuracy.

As shown in FIG. 2, the first bus bar 100 is electrically connected to the stator 30 on the upper side of the stator 30. In the present embodiment, the first bus bar 100 is a neutral point 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 dimension of the first bus bar 100 in the axial direction can be reduced, and the motor 10 can be easily downsized 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 the present specification, in each part of the first bus bar, the direction orthogonal to both the thickness direction of each part and the direction in which each part extends is referred to as the “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 the lower side by four insulator pieces 40P adjacent in the circumferential direction. The four insulator pieces 40P that support the first bus bar 100 are sequentially arranged from one circumferential side to the other circumferential side in order from the first insulator piece 40P1, the second insulator piece 40P2, the third insulator piece 40P3, and the fourth, respectively. Insulator piece 40P4. In other words, the plurality of insulator pieces 40P include a first insulator piece 40P1, a second insulator piece 40P2, a third insulator piece 40P3, and a fourth insulator piece 40P4 as the insulator pieces 40P arranged adjacent to each other in the circumferential direction.

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

The first bus bar main body 100a is supported by the insulator 40 on the radially outer side than the coil 34. The first bus bar main body 100a is held by the bus bar holding portion 45. The first bus bar main body 100 a includes 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 the support portion 45c of the first insulator piece 40P1 and the support portion 45b of the second insulator piece 40P2. Thereby, the 1st extending | stretching part 101 is spanned from the support part 45c of the 1st insulator piece 40P1 to the support part 45b of the 2nd insulator piece 40P2. That is, the first bus bar main body 100a is spanned from the support portion 45c of the first insulator piece 40P1 to the support portion 45b of the second insulator piece 40P2. In the present embodiment, the support portion 45c of the first insulator piece 40P1 corresponds to a first support portion, and the support portion 45b of the second insulator piece 40P2 corresponds to a second support portion. That is, the support portions 45b and 45c are a first support portion and a second support portion as support portions. In the present embodiment, the first support portion and the second support portion are arranged on different insulator pieces 40P.

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 the second extending direction in the first insulator piece 40P1, and is the first extending direction in the second insulator piece 40P2.

One end portion of the first extending portion 101 in the first direction D1 is disposed between the pair of wall portions 47a and 47b in the first insulator piece 40P1. One end portion of the first extending portion 101 in the first direction D1 is in a first orthogonal direction that is a direction orthogonal to the axial direction and intersecting the first direction D1 by the pair of wall portions 47a and 47b in the first insulator piece 40P1. Sandwiched. In the present embodiment, the first orthogonal direction is the second clamping direction in the first insulator piece 40P1, and is the first clamping direction in 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 portion of the first extending portion 101 in the first direction D1 is an end portion on one side in the circumferential direction of the first extending portion 101, and is an end portion on one side in the circumferential direction of the first bus bar body 100a.

The one end part of the 1st direction D1 of the 1st extending | stretching part 101 is the widened part 101a from which the dimension of a 1st orthogonal direction becomes large. Therefore, the 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 1st bus-bar 100 can be hold | maintained to the insulator 40 more stably. An end face of one end portion in the first direction D1 of the first extending portion 101 is exposed to the space portion G1 of the first insulator piece 40P1.

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

As described above, the first extending portion 101 is sandwiched between the pair of wall portions 47a and 47b in the first insulator piece 40P1 and the pair of wall portions 46a and 46b in the second insulator piece 40P2 in the first orthogonal direction. Sandwiched. In the present embodiment, the pair of wall portions 47a and 47b in the first insulator piece 40P1 correspond to a pair of first wall portions sandwiching the first bus bar main body 100a in the first orthogonal direction as the first predetermined direction. The pair of wall portions 46a and 46b in the second insulator piece 40P2 correspond to a pair of second wall portions that sandwich the first bus bar body 100a in the first orthogonal direction as the second predetermined direction. That is, in each wall part which pinches | interposes the 1st extending | stretching part 101 of this embodiment, a 1st predetermined direction and a 2nd predetermined direction are the same directions.

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 2nd extending | stretching part 102 is spanned over the support part 45b of the 3rd insulator piece 40P3 from the support part 45c of the 2nd insulator piece 40P2. That is, the first bus bar main body 100a is spanned from the support portion 45c of the second insulator piece 40P2 to the support portion 45b of the third insulator piece 40P3. In the present embodiment, the support portion 45c of the second insulator piece 40P2 corresponds to a first support portion, and the support portion 45b of the third insulator piece 40P3 corresponds to a second support portion.

The second extending portion 102 extends from the other end portion 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 is a first extending direction in the third insulator piece 40P3.

The one end part of the 2nd direction D2 of the 2nd extending | stretching part 102 is arrange | positioned between a pair of wall part 47a, 47b in the 2nd insulator piece 40P2. One end portion of the second extending portion 102 in the second direction D2 is in a second orthogonal direction which is a direction orthogonal to the axial direction and intersecting the second direction D2 by the pair of wall portions 47a and 47b in the second insulator piece 40P2. Sandwiched. In the present embodiment, the second orthogonal direction is the second clamping direction in the second insulator piece 40P2, and is the first clamping direction in 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 portion of the second extending portion 102 in the second direction D2 is an end portion on one side in the circumferential direction of the second extending portion 102. The third extending portion 103 is connected to the other end portion of the second extending portion 102 in the second direction D2. The other end portion of the second extending portion 102 in the second direction D2 is disposed between the pair of wall portions 46a and 46b in the third insulator piece 40P3. The other end portion in the second direction D2 of the second extending portion 102 is an end portion on the other side in the circumferential direction of the second extending portion 102.

As described above, the second extending portion 102 is sandwiched between the pair of wall portions 47a and 47b in the second insulator piece 40P2 in the second orthogonal direction, and is also disposed on the pair of wall portions 46a and 46b in the third insulator piece 40P3. Sandwiched. In the present embodiment, the pair of wall portions 47a and 47b in the second insulator piece 40P2 correspond to a pair of first wall portions sandwiching the first bus bar main body 100a in the second orthogonal direction as the first predetermined direction. The pair of wall portions 46a and 46b in the third insulator piece 40P3 correspond to a pair of second wall portions that sandwich the first bus bar main body 100a in the second orthogonal direction as the second predetermined direction. That is, in each wall portion sandwiching the second extending portion 102 of the present embodiment, the first predetermined direction and the second predetermined direction are the same direction.

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 support portion 45c of the third insulator piece 40P3 and the support portion 45b of the fourth insulator piece 40P4. Thereby, the 3rd extending | stretching part 103 is spanned from the support part 45c of the 4th insulator piece 40P4 from the support part 45c of the 3rd insulator piece 40P3. That is, the first bus bar main body 100a is spanned from the support portion 45c of the third insulator piece 40P3 to the support portion 45b of the fourth insulator piece 40P4. In the present embodiment, the support portion 45c of the third insulator piece 40P3 corresponds to a first support portion, and the support portion 45b of the fourth insulator piece 40P4 corresponds to a second support portion.

The third extending portion 103 extends from the other end portion 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 is a first extending direction in the fourth insulator piece 40P4. The third direction D3 is a direction that intersects the first direction D1.

The one end portion of the third extending portion 103 in the third direction D3 is disposed between the pair of wall portions 47a and 47b in the third insulator piece 40P3. One end portion of the third extending portion 103 in the third direction D3 is in a third orthogonal direction which is a direction orthogonal to the axial direction and intersecting the third direction D3 by the pair of wall portions 47a and 47b in the third insulator piece 40P3. Sandwiched. In the present embodiment, the third orthogonal direction is the second clamping direction in the third insulator piece 40P3, and the first clamping direction in 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 portion of the third extending portion 103 in the third direction D3 is an end portion on one side in the circumferential direction of the third extending portion 103. The other end of the third extending portion 103 in the third direction D3 is disposed between the pair of wall portions 46a and 46b in the fourth insulator piece 40P4. The other end portion in the third direction D3 of the third extending portion 103 is an end portion on the other circumferential side of the third extending portion 103, and an end portion on the other circumferential side of the first bus bar body 100a.

As described above, the third extending portion 103 is sandwiched between the pair of wall portions 47a and 47b in the third insulator piece 40P3 and the pair of wall portions 46a and 46b in the fourth insulator piece 40P4 in the third orthogonal direction. Sandwiched. In the present embodiment, the pair of wall portions 47a and 47b in the third insulator piece 40P3 correspond to a pair of first wall portions that sandwich the first bus bar main body 100a in the third orthogonal direction as the first predetermined direction. The pair of wall portions 46a and 46b in the fourth insulator piece 40P4 correspond to a pair of second wall portions that sandwich the first bus bar main body 100a in the third orthogonal direction as the second predetermined direction. That is, in each wall part which pinches | interposed the 3rd extending | stretching part 103 of this embodiment, the 1st predetermined direction and the 2nd predetermined direction are the same directions.

The other end portion of the third extending portion 103 in the third direction D3 is a widened portion 103a in which the dimension in the third orthogonal direction is increased. Therefore, the gap between the third extending portion 103 and the pair of wall portions 46a and 46b can be reduced between the pair of wall portions 46a and 46b. Thereby, the 1st bus-bar 100 can be hold | maintained to the insulator 40 more stably. The end surface of the other end portion in the third direction D3 of the third extending portion 103 is exposed to the space portion G1 of the fourth insulator piece 40P4.

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

The 1st corner | angular part 111 which is a corner | angular part where the 1st extending | stretching part 101 and the 2nd extending | stretching part 102 were connected is arrange | positioned in the space part G1 of the 2nd insulator piece 40P2. Wall portions are not provided on both sides of the first corner portion 111 in the width direction, and the first corner portion 111 is not sandwiched between the wall portions.

For example, when a pair of wall portions are provided on both sides in the width direction of the first corner portion, the pair of wall portions bend and extend along the first corner portion. In this case, the first corner portion is fitted between the corner portions of the pair of wall portions that are bent. However, if an error occurs in the dimension of the first bus bar due to an error in the length of the first extension part or the length of the second extension part, the first corner with respect to the bending corners of the pair of wall parts. The position of the portion may be displaced, and the first corner portion may not be fitted between the wall portions. Therefore, the first bus bar may not be arranged between the pair of wall portions.

In contrast, according to the present embodiment, the first corner portion 111 is disposed in the space portion G1. Therefore, even when an error occurs in the dimensions of the first bus bar 100, the first corner 111 is allowed to be displaced by the width of the space G1. Thereby, even if the position of the 1st corner | angular part 111 shift | deviates by a dimension error, the 1st bus-bar 100 can be arrange | positioned between each wall part. 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 capable of improving the assemblability can be 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 assemblability can be further improved.

Further, according to the present embodiment, the first bus bar main body 100 a is supported by the insulator 40 on the radially outer side than the coil 34. Therefore, for example, compared to the case where the first bus bar main body 100a is supported by the insulator 40 on the radially inner side of the coil 34, it is easy to secure a large area for holding the first bus bar main body 100a in the insulator 40. Therefore, it is easy to make the insulator 40 hold the first bus bar 100. Moreover, the 1st bus-bar main body 100a is extended in the shape of a broken line along the circumferential direction. Therefore, it is easy to arrange the first bus bar main body 100a in 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, it is easy to support the vicinity of the first corner portion 111 by the second insulator piece 40P2. Thereby, the 1st bus-bar 100 can be stably hold | maintained at the insulator 40. FIG.

As shown in FIG. 10, the apex of the first corner portion 111 faces radially outward. The portions of the insulator 40 are not disposed on both sides in the radial direction of the first corner portion 111. When the insulator 40 is viewed from the outside in the radial direction, the first corner portion 111 is exposed to the outside of the insulator 40. The first corner portion 111 is exposed to the outside of the insulator 40 when the insulator 40 is viewed from the inside in the radial direction. The first corner 111 overlaps the recess 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 portion 111 may be bent, and a part of the first corner portion 111 may be buckled in the axial direction. . Therefore, when supporting the 1st corner | angular part 111 from the lower side, the 1st corner | angular part 111 may float by the buckled part. 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 if a part of the first corner portion 111 is buckled, the buckled portion can be escaped by the recess 45d. Therefore, it is possible to suppress the first bus bar 100 from floating. Therefore, the first bus bar 100 can be accurately arranged.

As shown in FIG. 3, the 2nd corner | angular part 112 which is a corner | angular part where the 2nd extending | stretching part 102 and the 3rd extending | stretching part 103 were connected is arrange | positioned in the space part G1 of the 3rd 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.

Thus, 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 wall portions are provided on both sides in the width direction of each corner portion, it is necessary to match both of the corner portions with each of the bent corner portions of the pair of wall portions. Therefore, when an error occurs in the dimension of the first bus bar, the first bus bar may not be fitted between the wall portions.

On the other hand, according to the present embodiment, the first corner portion 111 and the second corner portion 112 are respectively disposed in the space portion G1, so that the first corner portion 111 and the second corner portion 112 are misaligned. Is acceptable. Thereby, even if the position of the 1st corner | angular part 111 and the position of the 2nd corner | angular part 112 each shift | deviate by a dimensional error, the 1st bus-bar 100 can be arrange | positioned between each wall part. Therefore, the effect that the first bus bar 100 according to the present embodiment can be easily arranged between the respective wall portions is particularly useful 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 in the first bus bar main body 100a can be easily inserted between the wall portions from the upper side, and can be 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 parts 101b, 102b, 103b are arranged in the space part G2. In the present embodiment, the space G2 is a space provided between the pair of first wall portions and the pair of second wall portions. The intermediate part 101b is a part of the first extending part 101, a part of the first bus bar main body 100a supported by the support part 45c of the first insulator piece 40P1 as the first support part, and a second support part. It is a part located between the part supported by the support part 45b of 2nd insulator piece 40P2 as.

The intermediate part 102b is a part of the second extending part 102, a part of the first bus bar body 100a that is supported by the support part 45c of the second insulator piece 40P2 as the first support part, and a second support part It is a part located between the part supported by the support part 45b of 3rd insulator piece 40P3 as.

The intermediate part 103b is a part of the third extending part 103, a part of the first bus bar main body 100a that is supported by the support part 45c of the third insulator piece 40P3 as the first support part, and a second support part. It is a part located between the part supported by the support part 45b of 4th insulator piece 40P4 as.

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

The coil connection parts 121, 122, 123 extend from the first bus bar 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 part 121 has a hook shape that protrudes radially inward from the center in the first direction D1 of the intermediate part 101b 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 connecting portion 121. That is, the coil lead wire 34b is sandwiched between the first bus bar main body 100a and the coil connecting portion 121. Although illustration is omitted, the coil connecting portion 122 is caulked outward in the radial direction, and grips the coil lead wire 34b with the intermediate portion 101b. The intermediate part 101b and the coil connection part 121 are fixed to the coil lead wire 34b by welding, for example. Thus, the coil lead wire 34b is connected to the first bus bar main body 100a and the coil connecting 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 intermediate part is different.

According to the present embodiment, the intermediate portions 101b, 102b, and 103b are disposed in the space portion G2, and the coil connecting portions 121, 122, and 123 are connected to the intermediate portions 101b, 102b, and 103b. Therefore, a space for working in the work of crimping the coil connecting parts 121, 122, 123 and the work of welding the coil connecting parts 121, 122, 123 and the first bus bar main body 100a and the coil lead wire 34b is a space. It can be secured by the part G2. This facilitates each operation. Moreover, when performing the operation | work which welds, it can suppress that the insulator 40 holding the 1st bus-bar main body 100a is damaged with a heat | fever. Therefore, according to the present embodiment, it is possible to obtain the motor 10 having a structure in which the coil connecting portions 121, 122, 123 and the coil lead wire 34 b can be easily connected and the insulator 40 can be prevented from being damaged.

Further, according to the present embodiment, the coil connecting portions 121, 122, 123 are connected to the radially inner edge of the first bus bar main body 100a. Thereby, when the 1st bus-bar main body 100a is hold | maintained at the insulator 40 in the radial direction outer side than the coil 34 as mentioned above, it is easy to connect the coil leader line 34b to the coil connection part 121,122,123.

Further, according to the present embodiment, the intermediate portions 101b, 102b, and 103b are intermediate portions in the extending portions that are spanned between the support portions. Therefore, the intermediate portions 101b, 102b, and 103b are disposed away from the insulator 40 on the upper side. This makes it easier to perform the above-described crimping operation and welding operation. Moreover, it can suppress more that the heat by welding is transmitted to the insulator 40 from the 1st bus-bar main body 100a, and can suppress more that the insulator 40 is damaged.

As shown in FIG. 1, the bearing holder 50 is disposed on the upper side of 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 bus bar holder 60 is disposed on the upper side of 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 includes 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 gripping 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 disposed on the upper side of the bus bar unit 90. The control device 80 is electrically connected to the second bus bar 70 via the connection terminal 72. The control device 80 is a power source that supplies power to the stator 30 via the second bus bar 70. The control device 80 includes a substrate on which an inverter circuit that controls electric power supplied to the stator 30 is provided.

The present invention is not limited to the above-described embodiment, and the following other configurations may be employed. The number of first bus bars is not particularly limited as long as it is one or more. The number of corners in one first bus bar body is not particularly limited as long as it is one or more. That is, the first bus bar main body may have only the first corner as the corner, or may have other corners in addition to the first corner and the second corner. The shape of the first bus bar body is not particularly limited. The first bus bar body may extend in an arc shape, for example. Moreover, the widening part may be arrange | positioned between the wall parts in the insulator piece in which the 1st corner | angular part where the 1st extending | stretching part and the 2nd extending | stretching part were connected is arrange | positioned. For example, in the above-described embodiment, the widened portion 101a of the first extending portion 101 may be disposed between the wall portions 46a and 46b of the second insulator piece 40P2. In this case, the 1st extending part 101 is supported only by the 2nd insulator piece 40P2, for example. 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 in a portion other than the end portion in each extending portion. The first bus bar may not have the widened portion.

The first direction in which the first extending portion extends and the second direction in which the second extending portion extends are not particularly limited as long as they are orthogonal to the axial direction and intersect each other. The first orthogonal direction may not be orthogonal to the first direction as long as it is orthogonal to the axial direction and intersects the first direction. The second orthogonal direction may not be orthogonal to the second direction as long as it is orthogonal to the axial direction and intersects the second direction. The third orthogonal direction may not be orthogonal to the third direction as long as it is orthogonal to the axial direction and intersects the third direction. The first predetermined direction and the second predetermined direction are not particularly limited as long as the first predetermined direction and the second predetermined direction are orthogonal to the axial direction and intersect with the direction in which the first bus bar body extends. The first predetermined direction and the second predetermined direction may be different from each other. The plate surface of the first bus bar may be parallel to the axial direction. The first bus bar may be a phase bus bar. The manufacturing method of 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 described above from the plate member.

In the insulator, a 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 that holds the first bus bar may be provided separately from the insulator. The number of first wall portions and the number of second wall portions are not particularly limited as long as each pair is provided. The number of support parts is not particularly limited as long as it is one or more. The recess may not be provided. The shape of the pressing part is not particularly limited. The pressing part may not be provided. The opening width of the first opening in the holding groove may vary in the axial direction. The lower portion of the bottom surface of the holding groove portion 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 portion on the winding end side of the conducting wire constituting the coil.

Each space part may include a space around it in addition to the space between the wall parts. Each space part may include, for example, a space radially outward from each wall part, or may include a space radially inward of each wall part. That is, for example, each corner portion disposed in each space portion may be provided so as to protrude radially outward from each pair of wall portions, or provided radially inward from each pair of wall portions. 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 inside than each pair of wall portions.

In addition, the use of the motor of the above-described embodiment is not particularly limited. Moreover, each structure mentioned above can be suitably combined in the range which is not mutually contradictory.

DESCRIPTION OF SYMBOLS 10 ... Motor, 20 ... Rotor, 21 ... Shaft, 30 ... Stator, 31 ... Stator core, 32 ... Core back, 33 ... Teeth, 34 ... Coil, 34b ... Coil lead wire (conductor), 40 ... Insulator (insulator), 45b , 45c ... support parts (first support part, second support part), 46a, 46b, 47a, 47b ... wall parts (first wall part, second wall part), 100 ... first bus bar, 100a ... first bus bar Body, 101b, 102b, 103b ... intermediate part, 121,122,123 ... coil connection part, G2 ... space part, J ... central axis

Claims (6)

1. 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;
   A first bus bar electrically connected to the stator on one axial side of the stator;
   A holding member for holding the first bus bar;
   With
   The first bus bar is
   A first bus bar body extending along a plane orthogonal to the axial direction;
   A coil connecting portion extending from the first bus bar body;
   Have
   Between the first bus bar body and the coil connection portion, a conductive wire extending from the coil is sandwiched,
   The conducting wire is connected to the first bus bar main body and the coil connecting portion,
   The holding member is
   A support portion for supporting the first bus bar body from the other side in the axial direction;
   A pair of first wall portions that are arranged side by side in a first predetermined direction that is perpendicular to an axial direction and intersects with a direction in which the first bus bar main body extends, and sandwich the first bus bar main body in the first predetermined direction;
   A pair of second wall portions that are arranged side by side in a second predetermined direction that is orthogonal to the axial direction and intersects with the direction in which the first bus bar main body extends, and sandwich the first bus bar main body in the second predetermined direction;
   Have
   A space is provided between the first wall and the second wall,
   The first bus bar body has an intermediate portion disposed in the space portion,
   The coil connection part is a motor connected to the intermediate part.
2. The stator is
   A stator core having a core back extending in the circumferential direction and a plurality of teeth extending radially from the core back;
   An insulator attached to the stator core;
   A plurality of coils respectively attached to the plurality of teeth via the insulator;
   Have
   The motor according to claim 1, wherein the holding member is the insulator.
3. The first bus bar body is supported by the insulator at a radially outer side than the coil, and extends in a polygonal line along the circumferential direction,
   The motor according to claim 2, wherein the coil connection portion is connected to a radially inner edge portion of the first bus bar main body.
4. The support part includes a first support part and a second support part as the support part,
   The first bus bar body is spanned from the first support part to the second support part,
   The said intermediate part is a part located between the part supported by the said 1st support part, and the part supported by the said 2nd support part among the said 1st bus-bar main bodies. The motor as described in any one.
5. The insulator has a plurality of insulator pieces,
   The motor according to claim 4, wherein the first support part and the second support part are arranged in different insulator pieces.
6. The motor according to any one of claims 1 to 5, wherein the first bus bar has a plate shape whose plate surface is orthogonal to the axial direction.

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