JP2019062708A - motor - Google Patents

Abstract

To provide a motor having a structure which allows for drive inspection, while restraining difficult connection of an electric power unit with a connection terminal part.SOLUTION: A motor includes a rotor having a shaft arranged along the medial axis, a stator having multiple coils, and facing the rotor via a gap in the radial direction, a bus bar 70 electrically connected with the stator, and a bus bar holder placed on one side of the stator in the axial direction, and holding the bus bar. A part of the bus bar is embedded in the bus bar holder, and one side in the axial direction is covered with the bus bar holder. The bus bar has a connection terminal part 70Aa exposed to the outside of the bus bar holder, and electrically connected to a power source for supplying electrical power to the stator, a coil connection part 75A exposed to the outside of the bus bar holder, and connected with a conductor extending from the coil, and an inspection part 72A exposed to one side of the bus bar holder in the axial direction, and electrically connected to an inspection terminal IA for supplying power to the stator.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a motor.

  A motor having a connection terminal connected to a power supply device is known. For example, Patent Document 1 describes an external terminal connected to external wiring as a connection terminal portion.

JP, 2014-176213, A

  In the motor as described above, before connecting the power supply device to the connection terminal portion, power may be supplied to the stator to perform a drive inspection or the like of the motor. In this case, the inspection terminal is connected to the connection terminal portion, and power is supplied to the stator through the connection terminal portion. However, when the connection terminal portion is connected to the inspection terminal, the connection terminal portion may be deformed or a portion holding the connection terminal portion may be deformed. This may make it difficult to connect the power supply device to the connection terminal portion after the drive inspection.

  An object of the present invention is to provide a motor having a structure capable of performing a drive test while suppressing difficulty in connecting a power supply device to a connection terminal portion in view of the above circumstances.

  One aspect of the motor according to the present invention includes a rotor having a shaft disposed along a central axis, a plurality of coils, and a stator radially opposed to the rotor via a gap, the stator and the electricity. And a bus bar holder disposed on one side in the axial direction of the stator and holding the bus bar. A part of the bus bar is embedded in the bus bar holder and the one axial side is covered by the bus bar holder. The bus bar is exposed to the outside of the bus bar holder, a connection terminal portion electrically connected to a power supply device supplying power to the stator, and exposed to the outside of the bus bar holder, and connected to a conductor extending from the coil And an inspection unit which is exposed on one side in the axial direction of the bus bar holder and which can be electrically connected to an inspection terminal for supplying power to the stator.

  According to one aspect of the present invention, there is provided a motor having a structure capable of performing a drive test while suppressing difficulty in connecting the power supply device to the connection terminal portion.

FIG. 1 is a cross-sectional view showing a motor of the present embodiment. FIG. 2 is a perspective view showing the stator and the bus bar unit of the present embodiment. FIG. 3 is a top view of the stator and the bus bar unit of the present embodiment. FIG. 4 is a perspective view showing a part of the stator and a part of the bus bar unit of the present embodiment. FIG. 5 is a perspective view showing a part of the stator and a part of the bus bar unit of the present embodiment. FIG. 6 is a perspective view showing the bus bar unit of the present embodiment. FIG. 7 is a view of a part of the motor of the present embodiment as viewed from the upper side of a bearing holder. FIG. 8 is a view of a part of a stator and a part of a bus bar unit in a modification of the present embodiment as viewed from inside in the radial direction.

  The Z-axis direction appropriately shown in each drawing is a vertical direction with the positive side as the upper side and the negative side as the lower side. A central axis J appropriately shown in each drawing is an imaginary line which is parallel to the Z-axis direction and extends in the vertical direction. In the following description, the axial direction of the central axis J, that is, the direction parallel to the vertical direction is simply referred to as “axial direction”, and the radial direction centering on the central axis J is simply referred to as “radial direction”. The circumferential direction centered on is simply referred to as "circumferential direction". In each figure, the circumferential direction is appropriately indicated by an arrow θ.

  Moreover, the positive side in the Z-axis direction in the axial direction is called "upper side", and the negative side in the Z-axis direction in the axial direction is called "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 which proceeds in the counterclockwise direction as viewed from the upper side to the lower side in the circumferential direction, that is, the side which proceeds in the direction of the arrow θ is referred to as “one side in the circumferential direction”. The side that proceeds clockwise as viewed from the upper side in the circumferential direction from the upper side to the lower side, that is, the side that proceeds in the direction opposite to the direction of the arrow θ is referred to as "the other side in the circumferential direction".

  Note that the vertical direction, the upper side and the lower side are simply names for describing the relative positional relationship of each part, and the actual arrangement relationship etc. is an arrangement relationship etc. other than the arrangement relationship etc. indicated by these names. May be

  As shown in FIG. 1, the motor 10 according to this embodiment includes a housing 11, a rotor 20, bearings 51 and 52, a stator 30, a control device 80, a bus bar unit 90, and a bearing holder 40. . The housing 11 accommodates each part of the motor 10. The housing 11 is cylindrical around the central axis J. The housing 11 holds the bearing 51 at the bottom on the lower side.

  The rotor 20 has 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 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 in the radial direction via a gap. The stator 30 surrounds the rotor 20 at the radially outer side of the rotor 20. The stator 30 has a stator core 31, an insulator 34, and a plurality of coils 35. The stator core 31 has a core back 32 and a plurality of teeth 33.

  As shown in FIGS. 2 and 3, the core back 32 extends in the circumferential direction. The core back 32 is cylindrical around the central axis J. As shown in FIG. 1, the outer peripheral surface of the core back 32 is fixed to the inner peripheral surface of the housing 11. As shown in FIG. 3, the teeth 33 extend radially from the core back 32. More specifically, the teeth 33 extend radially inward from the inner circumferential surface of the core back 32. The plurality of teeth 33 are arranged at equal intervals along the circumferential direction. In the present embodiment, twelve teeth 33 are provided, for example.

  The teeth 33 have a tooth main body 33a extending radially inward from the core back 32, and an umbrella portion 33b connected to the radial inner end of the tooth main body 33a. The umbrella part 33b protrudes in the circumferential direction both sides rather than the teeth main part 33a.

  In the present embodiment, the stator core 31 has a plurality of stator core pieces 31 a which are separate members. The stator core 31 has an annular shape in which a plurality of stator core pieces 31 a are connected to one another along the circumferential direction. Each stator core piece 31 a has one core back piece 32 a and one tooth 33. As shown in FIG. 2, the core back piece 32 a extends in the axial direction and curves along the circumferential direction. The core back pieces 32a of the respective stator core pieces 31a are connected to each other along the circumferential direction to constitute the core back 32. For example, twelve stator core pieces 31 a are provided.

  The insulator 34 is mounted on the stator core 31. In the present embodiment, a plurality of insulators 34 are provided. The plurality of insulators 34 are respectively attached to the stator core pieces 31 a. As shown in FIG. 1, the insulator 34 has an insulator main body 34a, an inner protrusion 34b, and an outer protrusion 34e. The insulator main body 34a is in the form of a tube that is open on both sides in the radial direction. The tooth main body 33a is passed through the inside of the insulator main body 34a. The insulator main body 34a covers the upper surface, the lower surface, and both circumferential side surfaces of the tooth main body 33a.

  The inner protrusion 34 b protrudes upward from the radial inner end of the insulator main body 34 a. As shown in FIG. 4, the inner protrusion 34 b has a pair of wall portions 34 c and 34 d. That is, the stator 30 has a pair of wall portions 34c and 34d. The wall 34 c and the wall 34 d are spaced apart in the circumferential direction. The wall portion 34 c is disposed on the upper side of the circumferential one end of the umbrella portion 33 b. The wall 34 d is disposed on the upper side of the other circumferential end of the umbrella 33 b.

  As shown in FIG. 1, the outer protrusion 34e protrudes upward from the radially outer end of the insulator body 34a. As shown in FIG. 5, the outer protrusion 34e extends in the circumferential direction. The circumferential dimension of the outer protrusion 34 e is substantially the same as the circumferential dimension of the core back piece 32 a. The outer protrusion 34 e is disposed on the upper side of the radially inner end of the core back piece 32 a.

  The outer protrusion 34 e has a recess 34 h that is recessed radially inward from the radial outer surface of the outer protrusion 34 e. The recess 34 h is provided at the circumferential center of the outer protrusion 34 e. The recess 34 h passes through the outer protrusion 34 e in the axial direction. By providing the recess 34 h, the outer protrusion 34 e is provided with a pair of wall portions 34 f and 34 g with the recess 34 h in the circumferential direction. That is, the stator 30 has a pair of wall portions 34f and 34g. The wall 34 f and the wall 34 g are spaced apart in the circumferential direction.

  As shown in FIGS. 1 to 3, the plurality of coils 35 are respectively attached to the plurality of teeth 33 via the insulators 34. As a result, in the present embodiment, twelve coils 35 are disposed at equal intervals along the circumferential direction. The coil 35 is configured by winding a conducting wire around the tooth main body 33a via the insulator main body 34a. As shown in FIG. 2, a coil lead wire 35 a is drawn upward from each coil 35. The coil lead-out wire 35 a is a conducting wire extending from the coil 35 and is an end of the conducting wire that constitutes the coil 35.

  The plurality of coils 35 constitute a plurality of coil groups having different power systems. In the present embodiment, for example, four coil groups having different power systems are configured. That is, the motor 10 of the present embodiment has, for example, four power systems. Each coil group includes, for example, three coils 35. The coils 35 included in each coil group in the present embodiment are arranged adjacent to each other in the circumferential direction.

  In the present specification, "a power system of a certain object is different" includes that power is supplied to a certain object independently for each power system. For example, in the present embodiment, three-phase AC power is independently supplied to the coils 35 of coil groups having different power systems.

  As shown in FIG. 1, the control device 80 has a control device main body 81 and a plurality of power supply terminal portions 82 projecting downward from the control device main body 81. The controller main body 81 is disposed at the upper end of the housing 11. In the present embodiment, the control device 80 is an electric component and is a power supply device that supplies power to the stator 30. Control device 80 supplies power to stator 30 via power supply terminal 82.

  The power supply terminal unit 82 is provided for each power system. In the present embodiment, four power supply terminal portions 82 are provided. Each power supply terminal portion 82 is connected to each bus bar unit 90, respectively. The power supply terminal portion 82 has three terminals 82 a extending downward. The three terminals 82a are terminals for supplying U-phase, V-phase and W-phase currents, respectively. The control device 80 can independently supply three-phase AC power to each power system via the power supply terminal unit 82 of each power system.

  The bus bar unit 90 is disposed on the upper side of the stator 30. The bus bar unit 90 has a bus bar holder 60 and a bus bar 70. That is, motor 10 includes bus bar holder 60 and bus bar 70. As shown in FIG. 2, a plurality of bus bar units 90 are provided circumferentially at intervals. That is, a plurality of bus bar holders 60 and a plurality of bus bars 70 are provided. In the present embodiment, the shapes of the bus bar units 90 are the same as one another. That is, the shape of each bus bar holder 60 in each bus bar unit 90 is the same as each other. The shape of each bus bar 70 in each bus bar unit 90 is the same as each other. Therefore, it is easy to manufacture a plurality of bus bar units 90 as compared to the case where the shapes are different from each other.

  The bus bar holder 60 is disposed on the upper side of the stator 30 and supported by the stator 30 from the lower side. The plurality of bus bar holders 60 are arranged along the circumferential direction. The plurality of bus bar holders 60 are separate members separated from each other. The plurality of bus bar holders 60 are circumferentially spaced from one another. In the present embodiment, the plurality of bus bar holders 60 are arranged at equal intervals along the circumferential direction. In FIG. 2, four bus bar units 90 and four bus bar holders 60 are provided.

  Each of the bus bar holders 60 holds at least one bus bar 70 different from each other. In the present embodiment, each of the bus bar holders 60 holds two or more bus bars 70. Thereby, a relatively small number of bus bar holders 60 can hold many bus bars 70. As shown in FIG. 6, in the present embodiment, each of the bus bar holders 60 holds three bus bars 70.

  As shown in FIGS. 4 and 5, the bus bar holder 60 has a base portion 61, an inner curved portion 62, an outer curved portion 63, a supported portion 67, and cylindrical portions 64A, 64B, 64C. The base 61 has a first base 61a and a second base 61b. The first base 61 a and the second base 61 b have a substantially rectangular parallelepiped shape. As shown in FIG. 3, the shape of the first base 61a as viewed from above and the shape of the second base 61b as viewed from above are rectangular shapes elongated in the radial direction and the direction orthogonal to the axial direction. The dimension of the second base 61 b is smaller than the dimension of the first base 61 a in the radial direction and the direction orthogonal to the axial direction. The second base 61 b protrudes radially outward from a circumferential center portion of the first base 61 a.

  The inner curved portion 62 extends in the circumferential direction. As shown in FIG. 4, the inner curved portion 62 is connected to the lower end of the radially inner end of the first base 61 a. The inner curved portion 62 has an arm 62a. That is, the bus bar holder 60 has an arm 62a. The arm 62 a is an end on the other side of the inner curved portion 62 in the circumferential direction. The arm 62 a protrudes to the other side in the circumferential direction than the base 61. The arm portion 62 a extends in the circumferential direction from the upper side of the tooth 33 supporting the supported portion 67 to the upper side of the tooth 33 adjacent in the circumferential direction to the tooth 33 supporting the supported portion 67. More specifically, the arm portion 62a extends to the upper side of the tooth 33 which does not support the bus bar unit 90 from the lower side. The arm 62 a is disposed on the upper side at the radially inner end of the tooth 33.

  As shown in FIG. 5, the outer curved portion 63 extends in the circumferential direction. The outer curved portion 63 is connected to the lower end of the radial outer ends of the second base 61 b. The outer curved portion 63 protrudes on both sides in the circumferential direction more than the second base 61 b.

  The supported portion 67 is in contact with the stator 30 and supported by the stator 30 from the lower side. The supported portion 67 is in contact with the upper end of the stator core 31 and is directly supported by the stator core 31 from the lower side. As shown in FIGS. 4 and 5, the supported portion 67 includes first supported portions 67a and 67b and second supported portions 67c and 67d. That is, in the present embodiment, a plurality of first supported portions and a plurality of second supported portions are provided.

  As shown in FIG. 4, the first supported portions 67 a and 67 b project downward from the radially inner end of the inner curved portion 62. The first supported portions 67a and 67b have a substantially rectangular plate shape whose plate surface is orthogonal to the radial direction. The first supported portions 67a and 67b are curved along the circumferential direction. The radially inner side surfaces of the first supported portions 67 a and 67 b are disposed at the same position in the radial direction as the radially inner side surface of the inner curved portion 62. The first supported portion 67a and the first supported portion 67b are arranged at intervals in the circumferential direction. That is, a plurality of supported portions 67 are provided along the circumferential direction.

  The first supported portions 67 a and 67 b are supported by the teeth 33 from the lower side. More specifically, the lower ends of the first supported portions 67a and 67b are in contact with the upper end of the umbrella portion 33b, and are supported from the lower side. As a result, the first supported portions 67 a and 67 b contact the upper end of the stator core 31 at the radially inner side of the coil 35. The teeth 33 supporting the first supported portion 67a and the teeth 33 supporting the first supported portion 67b are different from each other. Thus, the plurality of first supported portions include at least two first supported portions 67a and 67b supported by the different stator core pieces 31a. The teeth 33 supporting the first supported portion 67 a and the teeth 33 supporting the first supported portion 67 b are adjacent to each other in the circumferential direction.

  Lower portions of the first supported portions 67a and 67b are disposed between the pair of wall portions 34c and 34d in the circumferential direction. Thus, the wall portions 34c and 34d are disposed on at least one side of the circumferential sides of the first supported portions 67a and 67b. Therefore, for example, by bringing the first supported portions 67a, 67b into contact with the wall portions 34c, 34d in the circumferential direction, the first supported portions 67a, 67b can be positioned in the circumferential direction, and the bus bar holder 60 can be positioned in the circumferential direction .

  In the present embodiment, the pair of wall portions 34c and 34d are disposed on both sides in the circumferential direction of the first supported portions 67a and 67b. Therefore, the pair of wall portions 34c and 34d can position the bus bar holder 60 in the circumferential direction, and can suppress significant displacement of the circumferential direction position of the bus bar holder 60.

  An insulator 34 having wall portions 34c and 34d disposed on both sides in the circumferential direction of the first supported portion 67a; and an insulator 34 having wall portions 34c and 34d disposed on both sides in the circumferential direction of the first supported portion 67b; Are different from each other. The circumferential dimension of the first supported portions 67a and 67b is smaller than the circumferential distance between the pair of wall portions 34c and 34d. In FIG. 4, clearances are provided between the first supported portions 67a and 67b and the wall 34c in the circumferential direction and between the first supported portions 67a and 67b and the wall 34d in the circumferential direction. .

  As shown in FIG. 5, the second supported portions 67 c and 67 d project downward from the radially outer end of the outer curved portion 63. The second supported portion 67 c protrudes downward from an end of the outer curved portion 63 on one side in the circumferential direction. The second supported portion 67 d protrudes downward from the other end of the outer curved portion 63 in the circumferential direction. The second supported portions 67c and 67d have a substantially rectangular plate shape whose plate surface is orthogonal to the radial direction. The second supported portions 67c and 67d are curved along the circumferential direction. The radially outer side surfaces of the second supported portions 67 c and 67 d are disposed at the same position in the radial direction as the radially outer side surface of the outer curved portion 63. The second supported portion 67c and the second supported portion 67d are arranged at an interval in the circumferential direction.

  The second supported portions 67 c and 67 d are supported by the core back 32 from the lower side. Thus, the second supported portions 67 c and 67 d contact the upper end of the stator core 31 at the radially outer side of the coil 35.

  As described above, according to the present embodiment, the bus bar holder 60 is directly supported by the stator core 31 via the plurality of supported portions 67. Therefore, even when a load in the axial direction is applied to the bus bar holder 60, the load can be received by the stator core 31. Thereby, the load can be suppressed from being applied to the insulator 34. Therefore, damage to the insulator 34 can be suppressed. The stator core 31 supports the bus bar holder 60 on both sides in the radial direction of the coil 35 via the first supported portions 67a and 67b and the second supported portions 67c and 67d. Therefore, the bus bar holder 60 can be stably supported. Therefore, according to the present embodiment, motor 10 having a structure capable of stably supporting bus bar holder 60 while suppressing breakage of insulator 34 can be obtained.

  Further, for example, when only one bus bar holder is provided, the bus bar holder may be provided in an annular shape. In this case, even if only the bus bar holder is supported on one side in the radial direction of the coil 35, the bus bar holder may be able to be disposed on the upper side of the stator 30. However, when a plurality of bus bar holders 60 are provided as separate members separated from each other as in the present embodiment, if the bus bar holder 60 is supported on only one side in the radial direction, the bus bar holder 60 is inclined to the other side in the radial direction Therefore, the bus bar holder 60 may not be disposed on the upper side of the stator 30 in some cases. On the other hand, according to the present embodiment, since the bus bar holder 60 is supported on both sides in the radial direction of the coil 35, even when the bus bar holder 60 is provided as a plurality of separate members separated from each other, the bus bar holder 60 Can be stably disposed on the upper side of the stator 30.

  The core back piece 32a supporting the second supported portion 67c and the core back piece 32a supporting the second supported portion 67d are different from each other. Thus, the plurality of second supported portions include at least two second supported portions 67c and 67d supported by the different stator core pieces 31a. The core back piece 32a supporting the second supported portion 67c and the core back piece 32a supporting the second supported portion 67d are adjacent to each other in the circumferential direction.

  According to this embodiment, since the plurality of first supported portions 67a and 67b and the plurality of second supported portions 67c and 67d are supported by the stator core 31, the bus bar holder 60 can be supported more stably. Further, the plurality of first supported portions 67a and 67b and the plurality of second supported portions 67c and 67d are supported by the plurality of different stator core pieces 31a. Therefore, the portion supported by stator core 31 in bus bar holder 60, that is, supported portion 67 can be separated in the circumferential direction. Therefore, bus bar holder 60 can be supported more stably.

  The core back piece 32a supporting the second supported portion 67c is the core back piece 32a of the stator core piece 31a having the teeth 33 supporting the first supported portion 67a. The core back piece 32a supporting the second supported portion 67d is the core back piece 32a of the stator core piece 31a having the teeth 33 supporting the first supported portion 67b. As described above, in the present embodiment, the bus bar holder 60 is supported from the lower side by the two stator core pieces 31 a adjacent in the circumferential direction.

  In the present embodiment, since four bus bar holders 60 are provided, the total number of stator core pieces 31 a supporting the four bus bar holders 60 is eight. Since a total of twelve stator core pieces 31 a are provided, only some of the stator core pieces 31 a support the bus bar holder 60. That is, the teeth 33 supporting the supported portion 67 are only some of the teeth 33 among the plurality of teeth 33.

  The lower portions of the second supported portions 67c and 67d are inserted into the recess 34h. Thus, the lower portions of the second supported portions 67c and 67d are disposed between the pair of wall portions 34f and 34g in the circumferential direction. That is, the pair of wall portions 34f and 34g are disposed on both sides in the circumferential direction of the second supported portions 67c and 67d. An insulator 34 having wall portions 34f and 34g disposed on both sides in the circumferential direction of the second supported portion 67c; and an insulator 34 having wall portions 34f and 34g disposed on both sides in the circumferential direction of the second supported portion 67d; Are different from each other. The dimension in the circumferential direction of the second supported portions 67c and 67d is smaller than the circumferential distance between the pair of wall portions 34f and 34g. The dimensions of the second supported portions 67c and 67d in the circumferential direction are smaller than the dimensions of the first supported portions 67a and 67b in the circumferential direction. In FIG. 5, a clearance is provided between the second supported portions 67c and 67d and the wall 34f in the circumferential direction and between the second supported portions 67c and 67d and the wall 34g in the circumferential direction. .

  As described above, at least one of the circumferential portions between the wall portions 34c and 34d and the first supported portions 67a and 67b is provided with a gap. A gap is provided in at least one of the circumferential direction between the wall portions 34f and 34g and the second supported portions 67c and 67d. Thus, the first supported portions 67a and 67b and the second supported portions 67c and 67d are movable in the circumferential direction by the amount of the gap. Thus, the entire bus bar holder 60 can be easily arranged to be movable in the circumferential direction. In FIG. 4 and FIG. 5, gaps are provided all around the circumferential direction between the wall portions 34 c, 34 d, 34 f, 34 g and the supported portion 67. Therefore, the bus bar holder 60 is disposed movably in the circumferential direction by the gap in the circumferential direction between the wall portions 34c, 34d, 34f, 34g and the supported portion 67.

  The cylindrical portions 64A, 64B, 64C have a cylindrical shape that opens upward. More specifically, the cylindrical portions 64A, 64B, 64C have a cylindrical shape that opens upward. As shown in FIG. 4, the cylindrical portions 64 </ b> A and 64 </ b> B are provided on the inner curved portion 62 and project upward beyond the upper surface of the inner curved portion 62. The cylindrical portion 64 </ b> A is disposed at one end of the inner curved portion 62 in the circumferential direction. The cylindrical portion 64A is disposed on one side in the circumferential direction with respect to the base portion 61. An end on one circumferential side of the cylindrical portion 64A is disposed on one circumferential side with respect to the first supported portion 67a.

  The cylindrical portion 64 </ b> B is disposed on the other side of the inner curved portion 62 in the circumferential direction. The cylindrical portion 64 </ b> B is disposed on the other side in the circumferential direction than the base portion 61. The other end of the cylindrical portion 64B in the circumferential direction is disposed on the other side in the circumferential direction with respect to the first supported portion 67b and on the other side in the circumferential direction than the other end of the arm 62a. . The radially inner ends of the cylindrical portions 64A and 64B are disposed at the same positions as the radially inner ends of the inner curved portion 62 in the radial direction. The radially outer ends of the cylindrical portions 64A and 64B protrude radially outward of the inner curved portion 62.

  As shown in FIG. 5, the cylindrical portion 64 </ b> C is disposed at a portion on one circumferential side of the outer curved portion 63. The cylindrical portion 64C is disposed on one side in the circumferential direction with respect to the second base 61b. The cylindrical portion 64 </ b> C is disposed on the other side in the circumferential direction than an end portion on one side in the circumferential direction of the second supported portion 67 c. A portion of the cylindrical portion 64C overlaps with the second supported portion 67c as viewed from the upper side. The radially outer end of the cylindrical portion 64C protrudes radially outward of the outer curved portion 63 and the second supported portions 67c and 67d. When viewed in the radial direction in which the second base 61b protrudes from the first base 61a in the radial direction, a part of the cylindrical portion 64C overlaps the first base 61a.

  The upper ends of the cylindrical portions 64A, 64B, 64C are arranged at the same position in the axial direction. By providing the cylindrical portions 64A, 64B, 64C, the holes 65A, 65B, 65C that are recessed downward from the upper side are provided. That is, bus bar holder 60 has holes 65A, 65B and 65C. The inside of the hole 65A is constituted by the inside of the cylinder 64A. The inside of the hole 65B is constituted by the inside of the cylinder 64B. The inside of the hole 65C is constituted by the inside of the cylindrical portion 64C. The shape viewed from the upper side of the holes 65A, 65B, 65C is circular.

  The bus bar holder 60 has insertion holes 66A, 66B, 66C which are recessed downward from the upper side. As shown in FIG. 1, the insertion hole 66B penetrates the bus bar holder 60 in the axial direction. Although illustration is omitted, the insertion holes 66A and 66C also penetrate the bus bar holder 60 in the axial direction. As shown in FIG. 4, the insertion holes 66 </ b> A, 66 </ b> B and 66 </ b> C are provided in the base 61. More specifically, the insertion holes 66A and 66B are provided in the first base 61a. The insertion hole 66C is provided in the second base 61b. The insertion hole 66A and the insertion hole 66B are arranged side by side along the longitudinal direction of the first base 61a. The insertion hole 66B is disposed on the other side in the circumferential direction than the insertion hole 66A. The insertion hole 66C is disposed radially outward between the insertion hole 66A and the insertion hole 66B. The insertion holes 66A, 66B, and 66C have a rectangular shape elongated in the longitudinal direction of the first base 61a as viewed from the upper side.

  As shown in FIG. 6, the bus bar 70 is, for example, in the form of a plate formed by bending a plate member punched out by pressing. A part of the bus bar 70 is embedded in the bus bar holder 60 and covered by the bus bar holder 60 on the upper side. Thus, the bus bar holder 60 holds the bus bar 70. The three bus bars 70 held by the bus bar holders 60 in the present embodiment are phase bus bars electrically connected to the control device 80.

  The phase bus bar includes a first phase bus bar 70A, a second phase bus bar 70B, and a third phase bus bar 70C for each power system. In the present embodiment, each bus bar holder 60 holds, as the three bus bars 70, the first phase bus bar 70A, the second phase bus bar 70B, and the third phase bus bar 70C in one power system. That is, in the present embodiment, the bus bars 70 held by one bus bar holder 60 are three phase bus bars having the same power system.

  The first phase bus bar 70A includes a circumferential extension 71A, an inspection portion 72A, a first radial extension 73A, a first axial extension 74A, a coil connection portion 75A, and a second axial extension. 76A and a second radially extending portion 77A. The circumferentially extending portion 71A extends in the circumferential direction. The circumferential direction extending portion 71A has a plate shape whose plate surface is orthogonal to the axial direction. The entire circumferentially extending portion 71A is embedded in a portion on one circumferential side of the inner curved portion 62.

  The inspection unit 72A is connected to the end on one circumferential side of the circumferential extension 71A. The inspection unit 72A has a disk shape whose plate surface is orthogonal to the axial direction. That is, the inspection unit 72A is circular when viewed from the upper side. The outer diameter of the inspection portion 72A is larger than the radial dimension of the circumferentially extending portion 71A. The inspection unit 72A is provided at the bottom of the cylinder 64A. The inspection unit 72A is exposed to the inside of the cylindrical portion 64A. The inspection unit 72A constitutes at least a part of the bottom surface of the hole 65A. In the present embodiment, the entire bottom surface of the hole 65A is configured by the upper surface of the inspection unit 72A. Thus, the inspection unit 72A is exposed to the upper side of the bus bar holder 60 through the hole 65A.

  The first radially extending portion 73A extends radially outward from the inspection portion 72A. The first radially extending portion 73A has a plate shape whose plate surface is orthogonal to the axial direction. The first radially extending portion 73A protrudes from the lower end of the cylindrical portion 64A to the outside of the bus bar holder 60. The first axially extending portion 74A extends upward from the radially outer end of the first radially extending portion 73A. The first axially extending portion 74A extends to the upper side of the cylindrical portion 64A. The first axially extending portion 74A has a plate shape whose plate surface is orthogonal to the radial direction.

  The coil connection portion 75A is connected to the upper end of the first axially extending portion 74A. Thus, the coil connection portion 75A is connected to the distal end portion of the first radially extending portion 73A in the radial direction via the first axially extending portion 74A. The coil connection portion 75A has a U-shape opening in one circumferential side as viewed from the upper side. The coil connection portion 75A is configured by bending a plate-like portion whose plate surface is parallel to the axial direction. Coil connection portion 75A is exposed to the outside of bus bar holder 60.

  The second axially extending portion 76 </ b> A extends upward from the other circumferential end of the circumferential extending portion 71 </ b> A. The second axially extending portion 76A has a plate shape whose plate surface is orthogonal to the radial direction. The second radially extending portion 77A extends radially outward from the upper end of the second axially extending portion 76A. The second radially extending portion 77A has a plate shape whose plate surface is orthogonal to the axial direction. The second radially extending portion 77A penetrates the inside of the insertion hole 66A in the radial direction.

  The second radially extending portion 77A has a connection terminal portion 70Aa. That is, the first phase bus bar 70A includes the connection terminal portion 70Aa. The connection terminal portion 70Aa is an intermediate portion in the radial direction of the second radially extending portion 77A. The connection terminal 70Aa is disposed inside the insertion hole 66A. Thus, the connection terminal portion 70Aa is exposed to the outside of the bus bar holder 60 through the insertion hole 66A. More specifically, as shown in FIG. 7, the connection terminal portion 70Aa is exposed to the upper side of the bus bar holder 60. As shown in FIG. 6, the width of the connection terminal portion 70Aa is smaller than that of the other portion of the second radially extending portion 77A.

  At least a portion of a portion of the first phase bus bar 70A from the inspection portion 72A to the connection terminal portion 70Aa, and at least a portion of the first phase bus bar 70A from the inspection portion 72A to the coil connection portion 75A A portion is embedded in the bus bar holder 60 and covered by the bus bar holder 60 on the upper side. In the present embodiment, the entire portion of the first phase bus bar 70A from the inspection portion 72A to the connection terminal portion 70Aa is embedded in the bus bar holder 60 and the upper side is covered by the bus bar holder 60. In the portion between the inspection portion 72A and the coil connection portion 75A of the first phase bus bar 70A, the radially inner portion of the first radially extending portion 73A is embedded in the bus bar holder 60 and the upper side is the bus bar holder 60 Covered by

  The second phase bus bar 70B includes a circumferentially extending portion 71B, an inspection portion 72B, a first radially extending portion 73B, a first axially extending portion 74B, a coil connection portion 75B, and a second axially extending portion. 76B and a second radially extending portion 77B. The circumferentially extending portion 71B extends in the circumferential direction. The circumferentially extending portion 71B has a plate shape whose plate surface is orthogonal to the axial direction. The whole of the circumferentially extending portion 71B is embedded in a portion on the other side in the circumferential direction than the portion of the inner curved portion 62 in which the circumferentially extending portion 71A is embedded. The circumferentially extending portion 71B is spaced apart on the other side in the circumferential direction of the circumferentially extending portion 71A. The circumferentially extending portion 71B is disposed at the same position as the circumferentially extending portion 71A in the axial direction.

  The inspection unit 72B is connected to the other circumferential end of the circumferential extension 71B. The inspection unit 72B has a disk shape whose plate surface is orthogonal to the axial direction. That is, the inspection unit 72B is circular when viewed from the upper side. The outer diameter of the inspection portion 72B is larger than the radial dimension of the circumferentially extending portion 71B. The inspection unit 72B is provided at the bottom of the cylindrical portion 64B. The inspection unit 72B is exposed to the inside of the cylindrical portion 64B. The inspection unit 72B constitutes at least a part of the bottom surface of the hole 65B. In the present embodiment, the entire bottom surface of the hole 65B is configured by the upper surface of the inspection unit 72B. Thus, the inspection unit 72B is exposed to the upper side of the bus bar holder 60 through the hole 65B.

  The first radially extending portion 73B extends radially outward from the inspection portion 72B. The first radially extending portion 73B has a plate shape whose plate surface is orthogonal to the axial direction. The first radially extending portion 73B protrudes from the lower end portion of the cylindrical portion 64B to the outside of the bus bar holder 60. The first axially extending portion 74B extends upward from the radial outer end of the first radially extending portion 73B. The first axially extending portion 74B extends to the upper side than the cylindrical portion 64B. The first axially extending portion 74B has a plate shape whose plate surface is orthogonal to the radial direction.

  The coil connection portion 75B is connected to the upper end of the first axially extending portion 74B. Thus, the coil connection portion 75B is connected to the distal end portion of the first radially extending portion 73B in the radial direction via the first axially extending portion 74B. The shape of the coil connection portion 75B is the same as the shape of the coil connection portion 75A. Coil connection portion 75 </ b> B is exposed to the outside of bus bar holder 60.

  The second axially extending portion 76B extends upward from an end of the circumferentially extending portion 71B on one side in the circumferential direction. The second axially extending portion 76B has a plate shape whose plate surface is orthogonal to the radial direction. The second radially extending portion 77B extends radially outward from the upper end of the second axially extending portion 76B. The second radially extending portion 77B has a plate shape whose plate surface is orthogonal to the axial direction. The second radially extending portion 77B penetrates the inside of the insertion hole 66B in the radial direction.

  The second radially extending portion 77B has a connection terminal portion 70Ba. That is, the second phase bus bar 70B includes the connection terminal portion 70Ba. The connection terminal portion 70Ba is an intermediate portion in the radial direction of the second radially extending portion 77B. The connection terminal 70Ba is disposed inside the insertion hole 66B. Thereby, connection terminal part 70Ba is exposed to the exterior of bus bar holder 60 via insertion hole 66B. More specifically, as shown in FIG. 7, the connection terminal 70 Ba is exposed to the upper side of the bus bar holder 60. As shown in FIG. 6, the width of the connection terminal portion 70Ba is smaller than that of the other portion of the second radially extending portion 77B.

  At least a portion of a portion of second-phase bus bar 70B from inspection portion 72B to connection terminal portion 70Ba, and at least a portion of second-phase bus bar 70B from inspection portion 72B to coil connection portion 75B. A portion is embedded in the bus bar holder 60 and covered by the bus bar holder 60 on the upper side. In the present embodiment, the entire portion of the second phase bus bar 70B from the inspection portion 72B to the connection terminal portion 70Ba is embedded in the bus bar holder 60 and the upper side is covered by the bus bar holder 60. In the portion between the inspection portion 72B and the coil connection portion 75B of the second phase bus bar 70B, the radially inner portion of the first radially extending portion 73B is embedded in the bus bar holder 60 and the upper side is the bus bar holder 60 Covered by

  The third phase bus bar 70C includes a first circumferential extension 71C, a first radial extension 73C, an axial extension 74C, a coil connection 75C, a second radial extension 76C, and a second phase extension. It has a circumferential direction extending part 77C and an inspection part 72C. The first circumferentially extending portion 71C extends in the circumferential direction. The first circumferentially extending portion 71C has a plate shape whose plate surface is orthogonal to the axial direction. The entire first circumferentially extending portion 71C is embedded in the other side of the inner curved portion 62 in the circumferential direction.

  The end on one circumferential side of the first circumferentially extending portion 71C is disposed between the circumferentially extending portion 71A and the circumferentially extending portion 71B in the circumferential direction. The other circumferential end of the first circumferential extension 71C extends to the other circumferential end of the arm 62a, and is disposed on the other circumferential side of the circumferential extension 71B.

  The first circumferentially extending portion 71C is disposed below the circumferentially extending portions 71A and 71B. The first circumferentially extending portion 71C overlaps with the circumferentially extending portion 71B as viewed along the axial direction. That is, at least two of the two or more bus bars 70 held by the bus bar holder 60 have portions overlapping with each other as viewed in the axial direction. Therefore, it is easy to miniaturize the bus bar holder 60 in the radial direction.

  The first radially extending portion 73C extends radially outward from the other end of the first circumferentially extending portion 71C in the circumferential direction. The first radially extending portion 73C has a plate shape whose plate surface is orthogonal to the axial direction. The first radially extending portion 73C protrudes to the outside of the bus bar holder 60 from the other end of the arm 62a in the circumferential direction. That is, the first radially extending portion 73C is a radially extending portion extending in the radial direction from the circumferential tip of the arm 62a. The axially extending portion 74C extends upward from the radial outer end of the first radially extending portion 73C. The axially extending portion 74C extends above the cylindrical portions 64A, 64B, 64C. The axially extending portion 74C has a plate shape whose plate surface is orthogonal to the radial direction.

  The coil connection portion 75C is connected to the upper end of the axially extending portion 74C. Thus, the coil connection portion 75C is connected to the distal end portion of the first radially extending portion 73C in the radial direction via the axially extending portion 74C. The shape of the coil connection portion 75C is similar to the shape of the coil connection portion 75A. Coil connection portion 75 </ b> C is exposed to the outside of bus bar holder 60. The coil connection portion 75C is disposed on the other side in the circumferential direction of the coil connection portion 75B.

  The coil connection portion 75C is disposed on the upper side of the stator core piece 31a which does not support the supported portion 67. Thus, the coil connection portion 75C is not supported by the bus bar holder 60 by providing the coil connection portion 75C at the front end portion of the first radially extending portion 73C extending in the radial direction from the circumferential end of the arm portion 62a. It can be disposed on the upper side of the stator core piece 31a. As a result, the coil lead-out wire 35 a of the coil 35 mounted on the stator core piece 31 a not supporting the bus bar holder 60 can be easily connected to the bus bar 70.

  The second radially extending portion 76 </ b> C extends radially outward from an end of the first circumferentially extending portion 71 </ b> C on one side in the circumferential direction. The second radially extending portion 76 </ b> C extends from the inner curved portion 62 to the outer curved portion 63 via the base portion 61. The second radially extending portion 76C has a plate shape whose plate surface is parallel to the circumferential direction. A radial center portion of the second radially extending portion 76C is a central protruding portion 76Ca which is partially bent upward to project a part of the second radially extending portion 76C. The central protrusion 76Ca extends in the radial direction. The direction in which the central protrusion 76Ca extends is parallel to the direction in which the second radial extension 77A extends and the direction in which the second radial extension 77B extends. The central protrusion 76Ca is disposed at the same position as the second radially extending portions 77A and 77B in the axial direction. The central protrusion 76Ca penetrates the inside of the insertion hole 66C in the radial direction.

  The central protruding portion 76Ca has a connection terminal portion 70Ca. That is, the third phase bus bar 70C includes the connection terminal portion 70Ca. The connection terminal portion 70Ca is an intermediate portion in the radial direction of the central protruding portion 76Ca. The connection terminal portion 70Ca is disposed inside the insertion hole 66C. Thus, the connection terminal portion 70Ca is exposed to the outside of the bus bar holder 60 through the insertion hole 66C. More specifically, as shown in FIG. 7, the connection terminal portion 70Ca is exposed to the upper side of the bus bar holder 60. As shown in FIG. 6, the width of the connection terminal portion 70Ca is smaller than that of the other portion of the central protrusion 76Ca. The connection terminal portion 70Aa, the connection terminal portion 70Ba, and the connection terminal portion 70Ca are arranged at the same position in the axial direction.

  The radially inner end of the second radially extending portion 76C is disposed radially inward of the connection terminal portions 70Aa, 70Ba, and 70Ca. The radially outer end of the second radially extending portion 76C is disposed radially outward of the connection terminal portions 70Aa, 70Ba, and 70Ca. Thus, the third phase bus bar 70C is disposed straddling the connection terminal portions 70Aa, 70Ba, 70Ca from the radial direction inner side and the connection terminal portions 70Aa, 70Ba, 70Ca from the radial direction outer side. That is, at least one of the two or more bus bars 70 held by the bus bar holder 60 is radially outer than the connection terminal portions 70Aa, 70Ba, 70Ca from the radial direction inner side than the connection terminal portions 70Aa, 70Ba, 70Ca Are placed across the. The second circumferentially extending portion 77C extends in the circumferential direction from the radially outer end of the second radially extending portion 76C. The entire second circumferentially extending portion 77C is embedded in the outer curved portion 63.

  The inspection unit 72 </ b> C is connected to an end on one circumferential side of the second circumferential extending portion 77 </ b> C. The inspection unit 72C has a disk shape whose plate surface is orthogonal to the axial direction. That is, the inspection unit 72C is circular when viewed from the upper side. The outer diameter of the inspection portion 72C is larger than the radial dimension of the second circumferentially extending portion 77C. The inspection unit 72C is provided at the bottom of the cylinder 64C. The inspection unit 72C is exposed to the inside of the cylindrical portion 64C. The inspection unit 72C constitutes at least a part of the bottom surface of the hole 65C. In the present embodiment, the entire bottom surface of the hole 65C is configured by the upper surface of the inspection unit 72C. Thus, the inspection unit 72C is exposed to the upper side of the bus bar holder 60 through the hole 65C.

  At least a part of the portion from the inspection portion 72C to the connection terminal portion 70Ca of the third phase bus bar 70C, and at least a portion from the inspection portion 72C to the coil connection portion 75C of the third phase bus bar 70C A portion is embedded in the bus bar holder 60 and covered by the bus bar holder 60 on the upper side. In the present embodiment, the entire portion of the third phase bus bar 70C from the inspection portion 72C to the connection terminal portion 70Ca is embedded in the bus bar holder 60 and the upper side is covered by the bus bar holder 60. In the portion between the inspection portion 72C and the coil connection portion 75C in the third phase bus bar 70C, the entire portion excluding the connection terminal portion 70Ca and the radially outer portion of the first radial extension portion 73C is the bus bar holder 60 And the upper side is covered by the bus bar holder 60.

  As shown in FIG. 4, the coil leader 35a is passed through the inside of each of the coil connection portions 75A, 75B, 75C. Although illustration is omitted, the coil connecting portions 75A, 75B, 75C are crimped from both ends in the radial direction at the U-shaped open end and clamp the coil lead wire 35a from both sides in the radial direction. The coil connection portions 75A, 75B, 75C and the coil lead-out wire 35a are fixed to each other by welding, for example. Thereby, coil connection parts 75A, 75B, and 75C are connected with coil lead-out wire 35a, and bus bar 70 is electrically connected with stator 30.

  The coil connection portion 75A, the coil connection portion 75B, and the coil connection portion 75C are disposed at the same position in the axial direction. Therefore, the axial position when caulking each coil connection portion 75A, 75B, 75C, and the axial position when welding each coil connection portion 75A, 75B, 75C and the coil lead wire 35a are each coil connection portion. It can be made the same in 75A, 75B, 75C. Therefore, the operation of connecting the coil leader 35a to each of the coil connection parts 75A, 75B, 75C can be simplified.

  According to the present embodiment, the coil connection portions 75A, 75B, 75C are disposed above the cylindrical portions 64A, 64B, 64C. That is, the upper ends of the cylindrical portions 64A, 64B, 64C are disposed lower than the coil connection portions 75A, 75B, 75C. Thereby, when connecting coil connection part 75A, 75B, 75C and coil lead-out wire 35a, the apparatus which crimps coil connection part 75A, 75B, 75C, and coil connection part 75A, 75B, 75C, and coil lead-out wire 35a Can be prevented from interfering with the cylindrical parts 64A, 64B, 64C. Therefore, it is easy to connect coil connecting parts 75A, 75B, and 75C and coil leader 35a.

  Each of the connection terminal portions 70Aa, 70Ba, 70Ca is electrically connected to the control device 80. More specifically, as shown in FIG. 1, the terminals 82a of the power supply terminals 82 are inserted into the insertion holes 66A, 66B, 66C and exposed in the insertion holes 66A, 66B, 66C. Contact with the parts 70Aa, 70Ba, 70Ca. Thereby, each connection terminal part 70Aa, 70Ba, 70Ca contacts with the control apparatus 80 through the terminal 82a, and is electrically connected.

  As described above, when the bus bar holder 60 has the insertion holes 66A, 66B, 66C into which the terminals 82a are inserted, when connecting the respective terminals 82a to the insertion holes 66A, 66B, 66C, Directional load is likely to be applied. On the other hand, according to the present embodiment, since the load applied to the bus bar holder 60 can be received by the stator core 31 as described above, breakage of the insulator 34 can be suppressed. Therefore, when bus bar holder 60 has insertion holes 66A, 66B, 66C into which terminal 82a is inserted, the effect of suppressing breakage of insulator 34 in the present embodiment is particularly useful.

  In particular, in the present embodiment, each terminal 82a is press-fit into each of the insertion holes 66A, 66B, 66C, for example. In such a case, a relatively large axial load is likely to be applied to the bus bar holder 60 when connecting the terminals 82a to the insertion holes 66A, 66B, 66C. Even in this case, the load applied to the bus bar holder 60 can be received by the stator core 31, so that breakage of the insulator 34 can be suppressed.

  In the present embodiment, the insertion holes 66A, 66B, 66C are arranged between the first supported portions 67a, 67b and the second supported portions 67c, 67d in the radial direction. Therefore, even when a relatively large axial load is applied to the bus bar holder 60 through the insertion holes 66A, 66B, 66C, the load can be determined by the first supported portions 67a, 67b and the second supported portion. Equally susceptible to both 67c and 67d. Therefore, the bus bar holder 60 can be stably supported by the stator core 31.

  For example, the U-phase terminal 82a is connected to the connection terminal portion 70Aa of the first phase bus bar 70A. V-phase terminal 82a is connected to connection terminal portion 70Ba of second phase bus bar 70B. A W-phase terminal 82a is connected to the connection terminal portion 70Ca of the third phase bus bar 70C. As a result, currents having different phases are supplied to the first phase bus bar 70A, the second phase bus bar 70B, and the third phase bus bar 70C through the respective terminals 82a. Therefore, three-phase AC power is supplied from the control device 80 to the coil group of one power system via the first phase bus bar 70A, the second phase bus bar 70B, and the third phase bus bar 70C.

  When a plurality of power systems are provided as in the present embodiment, for example, when the number of connected power terminal portions 82 increases and the relative position of the power terminal portions 82 deviates, each power terminal portion 82 and each connection terminal portion 70Aa , 70Ba, 70Ca may be difficult to connect.

  On the other hand, according to this embodiment, a plurality of bus bar holders 60 which are separate members separated from each other are provided. Therefore, it is easy to adjust the positions of the bus bar holders 60 independently in accordance with the positions of the power supply terminal portions 82 connected to the bus bars 70 held by the bus bar holders 60. Therefore, even when the relative positions of the power supply terminal portions 82 are shifted, the power supply terminal portions 82 and the connection terminal portions 70Aa, 70Ba, 70Ca are connected by adjusting the relative positions of the bus bar holders 60. It is easy to do. Therefore, according to the present embodiment, the power system has a plurality of coil groups different from each other, and has a structure capable of facilitating connection between the connection terminal portions 70Aa, 70Ba, 70Ca and the electrical components in the bus bars 70 of each power system. The motor 10 is obtained.

  In the present embodiment, the electrical components connected to the connection terminal portions 70Aa, 70Ba, 70Ca are the control device 80 as a power supply device, and the bus bar holder 60 holds the phase bus bar among the bus bars 70. Therefore, connection between the connection terminal portions 70Aa, 70Ba, 70Ca and the control device 80 for supplying power to the stator 30 can be facilitated. Further, in the present embodiment, the bus bar holder 60 holds the first phase bus bar 70A, the second phase bus bar 70B, and the third phase bus bar 70C in one power system. Therefore, the phase bus bars of one power system can be collectively held by one bus bar holder 60. Therefore, as in the present embodiment, when the plurality of terminals 82a in one power system are combined as the power supply terminal portion 82, the power supply terminal portion 82 and the three connection terminal portions 70Aa, 70Ba, 70Ca can be easily connected.

  Further, according to the present embodiment, each bus bar holder 60 can be appropriately disposed in a portion where the bus bar 70 needs to be disposed. Therefore, it is easy to reduce the volume of the bus bar holder 60 as a whole as compared to the case where all the bus bars are held by one bus bar holder. Therefore, the manufacturing cost of bus bar holder 60 can be reduced.

  Further, according to the present embodiment, the bus bar holder 60 is disposed movably in the circumferential direction. Therefore, after each bus bar holder 60 is arranged on stator 30, bus bar holder 60 can be moved in the circumferential direction. Thus, the circumferential position of the bus bar holder 60 can be easily adjusted according to the position of the power supply terminal portion 82, and the connection between the connection terminal portions 70Aa, 70Ba, 70Ca and the control device 80 can be made easier. In the present embodiment, at least one of the circumferential portions between the wall portions 34c, 34d, 34f, and 34g and the supported portion 67 is provided with a gap, so the bus bar holder is selected according to the size of the gap. The circumferential position of 60 can be adjusted.

  Moreover, according to the present embodiment, the teeth 33 supporting the supported portion 67 are only some teeth 33. Therefore, a region where the bus bar holder 60 is not disposed can be provided on the upper side of the tooth 33 which does not support the supported portion 67, and the volume of the bus bar holder 60 can be easily reduced. Thereby, the manufacturing cost of the bus bar holder 60 can be further reduced.

  Further, according to the present embodiment, the bus bar holders 60 are arranged at intervals in the circumferential direction. Therefore, bus bar holder 60 can be arranged to be movable in the circumferential direction. Moreover, the area | region where the bus-bar holder 60 is not arrange | positioned can be provided in the circumferential direction of bus-bar holder 60 comrades. Therefore, the volume of bus bar holder 60 can be further reduced, and the manufacturing cost of bus bar holder 60 can be further reduced.

  Further, according to the present embodiment, the plurality of bus bar holders 60 are arranged at equal intervals along the circumferential direction. Therefore, for example, when the power supply terminal portions 82 are arranged at regular intervals along the circumferential direction, the power supply terminal portions 82 can be easily connected to the bus bars 70 held by the bus bar holders 60, respectively.

  Further, according to the present embodiment, the connection terminal portions 70Aa, 70Ba, 70Ca are disposed inside the insertion holes 66A, 66B, 66C. Therefore, when the power supply terminal portion 82 extending from the control device 80 toward the bus bar unit 90 is provided as in the present embodiment, the terminal 82a of the power supply terminal portion 82 is inserted into the insertion hole 66A, 66B, 66C. The power supply terminal portion 82 can be connected to the connection terminal portions 70Aa, 70Ba, 70Ca. In addition, for example, the point of action of the force generated between control device 80 and bus bar holder 60 can be easily set to the side of bus bar holder 60 as compared with the case where the connection terminal extends upward and is connected to the control device. Therefore, the bus bar holder 60 can be easily moved in the circumferential direction, and the circumferential position of the bus bar holder 60 can be easily adjusted.

  As shown in FIG. 6, each of the inspection units 72A, 72B, and 72C can be electrically connected to an inspection terminal IA that supplies power to the stator 30. The inspection terminal IA has a cylindrical shape extending in the axial direction. The lower end of the inspection terminal IA is inserted into each of the cylindrical portions 64A, 64B, 64C. The lower surface of the inspection terminal IA contacts the upper surfaces of the inspection units 72A, 72B, 72C. Thus, for example, a U-phase current can be supplied from the inspection unit 72A to the first phase bus bar 70A through the inspection terminal IA. For example, a V-phase current can flow from the inspection unit 72B to the second phase bus bar 70B through the inspection terminal IA. For example, a W-phase current can be supplied from the inspection unit 72C to the third phase bus bar 70C.

  Therefore, according to the present embodiment, three-phase alternating current power can be supplied to the stator 30 by connecting the inspection terminals IA to the inspection units 72A, 72B, and 72C. Therefore, the drive inspection of the motor 10 can be performed without connecting the inspection terminal IA to the connection terminal portions 70Aa, 70Ba, 70Ca. This prevents deformation of the bus bar holder 60 holding the connection terminal portions 70Aa, 70Ba, 70Ca and the connection terminal portions 70Aa, 70Ba, 70Ca before connecting the terminals 82a to the connection terminal portions 70Aa, 70Ba, 70Ca. it can. Therefore, it is possible to obtain the motor 10 having a structure capable of performing the drive inspection while suppressing the difficulty of connecting the control device 80 to the connection terminal portions 70Aa, 70Ba, 70Ca.

  Further, as in the present embodiment, when the terminal 82a of the power supply terminal 82 is inserted into the insertion hole 66A, 66B, 66C and connected to the connection terminal 70Aa, 70Ba, 70Ca, the connection terminal 70Aa, 70Ba, 70Ca If it is going to connect the inspection terminal IA, the insertion holes 66A, 66B, 66C may be deformed by the inspection terminal IA being inserted. Therefore, after the drive inspection of the motor 10 is performed, in particular, it may be difficult to connect the power supply terminal unit 82 and the connection terminal units 70Aa, 70Ba, and 70Ca. Therefore, the effect of suppressing difficulty in connecting the control device 80 and the connection terminal portions 70Aa, 70Ba, 70Ca is that the terminal 82a of the power supply terminal portion 82 is inserted into the insertion hole portions 66A, 66B, 66C. Especially useful.

  Further, according to the present embodiment, at least a part of the portion of the bus bar 70 from the inspection portion 72A, 72B, 72C to the connection terminal portion 70Aa, 70Ba, 70Ca, and the inspection portion 72A, 72B, of the bus bar 70 At least a part of the portion from 72 C to the coil connection parts 75 A, 75 B, 75 C is embedded in the bus bar holder 60 and covered by the bus bar holder 60 on the upper side. Therefore, when viewed from the upper side of the bus bar holder 60, the inspection parts 72A, 72B, 72C separate part of the bus bar holder 60 from the connection terminal parts 70Aa, 70Ba, 70Ca and the coil connection parts 75A, 75B, 75C. Provided. Thereby, it is easy to adopt the structure which is easy to connect inspection terminal IA to inspection parts 72A, 72B, and 72C.

  Specifically, a configuration can be employed in which holes 65A, 65B, 65C are provided in which the inspection units 72A, 72B, 72C constitute at least a part of the bottom surface. As a result, the inspection terminal IA can be inserted into the holes 65A, 65B, 65C, and the inspection units 72A, 72B, 72C and the inspection terminal IA can be connected. Therefore, the inspection terminal IA can be positioned in the direction orthogonal to the axial direction by the inner peripheral surfaces of the holes 65A, 65B, 65C, and the connection between the inspection parts 72A, 72B, 72C and the inspection terminal IA can be facilitated. Furthermore, in the present embodiment, by providing the cylindrical portions 64A, 64B, 64C, the holes 65A, 65B, 65C are configured. As a result, a part of the bus bar holder 60 can be partially protruded upward, and the axial dimension of the portion where the inspection terminal IA is inserted into the hole 65A, 65B, 65C can be increased. On the other hand, in portions other than the cylindrical portions 64A, 64B, 64C of the bus bar holder 60, there is no need to increase the axial dimension, and the axial dimension can be relatively reduced. Therefore, an increase in the volume of the entire bus bar holder 60 can be suppressed. Thereby, the connection between the inspection terminal IA and the inspection portions 72A, 72B, 72C can be stabilized while suppressing the bus bar holder 60 from being enlarged.

  In the present embodiment, the exposed area of the inspection units 72A, 72B, and 72C is larger than the exposed area of the connection terminal units 70Aa, 70Ba, and 70Ca. Therefore, the inspection terminal IA can be more easily connected to the inspection units 72A, 72B, and 72C. Further, in the present embodiment, the inspection units 72A, 72B, and 72C are circular when viewed from the upper side. Therefore, for example, compared with the case where the shape viewed from the upper side is a polygonal shape, the same exposed area can be secured while reducing the maximum dimension in the direction orthogonal to the axial direction in the inspection parts 72A, 72B, 72C. Therefore, it is easy to miniaturize the bus bar holder 60 in the direction orthogonal to the axial direction while increasing the exposed area of the inspection parts 72A, 72B, 72C.

  The inspection unit 72A, the inspection unit 72B, and the inspection unit 72C are arranged at the same position in the axial direction. That is, in two or more bus bars 70 which bus bar holder 60 holds, the axial direction position of inspection parts 72A, 72B, and 72C is mutually the same. Therefore, each of the plurality of inspection terminals IA can be easily connected to the plurality of inspection units 72A, 72B, and 72C.

  The inspection unit 72A and the inspection unit 72B are located radially inward of the connection terminal units 70Aa, 70Ba, and 70Ca. The inspection unit 72C is located radially outward of the connection terminal portions 70Aa, 70Ba, and 70Ca. That is, in the present embodiment, the inspection unit is an inspection unit 72A, 72B located radially inward of the connection terminal portions 70Aa, 70Ba, 70Ca, and an inspection located radially outside the connection terminal portions 70Aa, 70Ba, 70Ca. And 72C. Therefore, the size in the circumferential direction of the bus bar holder 60 can be easily reduced as compared to the case where the plurality of inspection sections 72A, 72B, 72C are all arranged in the circumferential direction. In the present embodiment, the third phase bus bar 70C is disposed straddling the connection terminal portions 70Aa, 70Ba, 70Ca from the radial direction inner side and the connection terminal portions 70Aa, 70Ba, 70Ca from the radial direction outer side. Therefore, the inspection portion 72C of the third phase bus bar 70C can be easily disposed on the opposite side to the inspection portions 72A and 72B with the connection terminal portions 70Aa, 70Ba and 70Ca interposed in the radial direction.

  As shown in FIG. 1, the bearing holder 40 is disposed on the upper side of the bus bar unit 90. The bearing holder 40 has an annular shape centered on the central axis J. In the present embodiment, the bearing holder 40 is a lid that covers the upper side of the bus bar holder 60. The outer peripheral surface of the bearing holder 40 is fixed to the inner peripheral surface of the housing 11. A bearing 52 is held on the inner circumferential surface of the bearing holder 40. As shown in FIGS. 1 and 7, the bearing holder 40 has a first through hole 40 a and a second through hole 40 b axially penetrating the bearing holder 40.

  In the present embodiment, one first through hole 40 a is provided for each power system. That is, in the present embodiment, a total of four first through holes 40a are provided. As shown in FIG. 7, the first through holes 40a overlap with the connection terminal portions 70Aa, 70Ba, 70Ca as viewed in the axial direction. The first through holes 40 a have a shape along the outer shape of the base 61 as viewed in the axial direction. The inner edge of the first through hole 40 a is disposed inside the outline of the base 61. As shown in FIG. 1, the terminal 82 a of the power supply terminal portion 82 is passed through the first through hole 40 a. In the present embodiment, three terminals 82a are passed through one first through hole 40a.

  In the present embodiment, three second through holes 40 b are provided for each power system. That is, in the present embodiment, a total of twelve second through holes 40 b are provided. As shown in FIG. 7, each second through hole 40b provided for one power system is viewed along the axial direction, and overlaps with each of the inspection units 72A, 72B, and 72C. Therefore, the inspection terminal IA can be passed through the second through hole 40b from the upper side of the bearing holder 40 to connect the inspection terminal IA and the inspection units 72A, 72B, 72C. Thereby, even after the bearing holder 40 is disposed, the drive inspection of the motor 10 can be performed by the inspection terminal IA. The second through holes 40 b are circular. The inner edge of the second through hole 40b is disposed inside the holes 65A, 65B, 65C as viewed in the axial direction.

(Modification)
As shown in FIG. 8, in the bus bar holder 160 of the motor 110 according to the present modification, a plurality of supported portions 167 are provided along the circumferential direction. The plurality of supported portions 167 include a first supported portion 167a, a first supported portion 167b, and a first supported portion 167c. The first supported portion 167 a is supported from the lower side by an end portion on one side in the circumferential direction of the teeth 33. The first supported portion 167c is supported from the lower side by an end portion on the other side in the circumferential direction of the tooth 33 adjacent to the other side in the circumferential direction of the tooth 33 on which the first supported portion 167a is supported.

  The first supported portion 167b is disposed between the first supported portion 167a and the first supported portion 167c in the circumferential direction. The first supported portion 167b is supported from the lower side by both of the teeth 33 adjacent in the circumferential direction that support the first supported portion 167a and the first supported portion 167c. Between the circumferential direction of the first supported portion 167a and the first supported portion 167b, and between the circumferential direction of the first supported portion 167b and the first supported portion 167c, the inner projecting portion 134b of the insulator 134 is provided. Is placed. In the present modification, the inner protrusion 134 b is a wall disposed between the supported portions 167 adjacent in the circumferential direction. The bus bar holder 160 can be positioned in the circumferential direction by the inner protrusion 134 b as a wall. In FIG. 8, a gap is provided between the inner protrusion 134b and the first supported portions 167a, 167b, and 167c in the circumferential direction.

  In the present modification, the second supported portions may be provided in the same manner as the second supported portions 67c and 67d. Alternatively, the second supported portions may be provided in the same manner as the first supported portions 167a, 167b and 167c. One configuration may be provided. When two second supported portions are provided in the same manner as the second supported portions 67c and 67d, the number of first supported portions and the number of second supported portions are different from each other. In this case, it is possible to stably support the bus bar holder by, for example, increasing the number of supported portions provided on the side to which a load is easily applied among the radially inner side and the radially outer side. The total number can be reduced.

  The present invention is not limited to the above-described embodiment, and the following other configurations can be adopted. In the embodiment described above, each of the bus bars held by the bus bar holder has the connection terminal portion, but the present invention is not limited to this. In each of the plurality of bus bar holders, at least one of the bus bars held by the bus bar holder may have the connection terminal portion. That is, if the bus bar holder holds one or more bus bars having connection terminal portions, the bus bar holder may hold bus bars not having connection terminal portions.

  The number of bus bars held by the bus bar holder is not particularly limited as long as it is one or more. The bus bar holder may hold only one bus bar. In the plurality of bus bar holders, the number of bus bars to be held may be different from one another. In the above-described embodiment, each bus bar holder holds the phase bus bar, but the present invention is not limited to this. At least one of the bus bar holders may hold the phase bus bar. That is, a bus bar holder may be provided to hold bus bars other than the phase bus bar.

  The bus bars other than the phase bus bar are, for example, neutral point bus bars. The neutral point bus bar is a bus bar connecting two or more coils as a neutral point. That is, at least one of the bus bar holders may hold the neutral point bus bar among the bus bars. In this case, when connecting the connection terminal portion of the neutral point bus bar and the electrical component, the circumferential position of the bus bar holder can be adjusted, and the neutral point bus bar and the electrical component can be easily connected.

  In the above-described embodiment, three bus bars for the first phase, the second phase bus bar, and the third phase bus bar in one power system are held in each bus bar holder, but the present invention is limited thereto. I can not. At least one of the bus bar holders may hold the first phase bus bar, the second phase bus bar, and the third phase bus bar in one electric power system.

  For example, at least one of the bus bar holders may be configured to hold only one of the first phase bus bar, the second phase bus bar, and the third phase bus bar. In this case, one bus bar holder can collectively hold the phase bus bars to which the current of the same phase is supplied. In this case, at least one of the bus bar holders holds two or more bus bars different in power system of coils to be connected.

  For example, in at least one power system, at least two of the first phase bus bar, the second phase bus bar, and the third phase bus bar may be configured to be held by different bus bar holders.

  As described above, the number and type of bus bars held by the bus bar holder are not particularly limited, and can be appropriately determined according to the type and arrangement of the electrical components connected to the connection terminal portions of the bus bars.

  The number of bus bar holders is not particularly limited as long as it is one or more. The shapes of the plurality of bus bar holders may be different from one another. In the assembled motor, the bus bar holder may be fixed in the circumferential direction. Even in this case, by providing a plurality of bus bar holders that are separate members separated from each other, the circumferential position of each bus bar holder may be adjusted independently before being arranged at the time of assembling the motor. it can. The plurality of bus bar holders may contact each other.

  The plurality of bus bar holders may be arranged at irregular intervals along the circumferential direction. In this case, for example, when the power supply terminal portions are arranged at unequal intervals along the circumferential direction, the power supply terminal portions can be easily connected to the bus bars held by the bus bar holders.

  A gap may not be provided between the wall and the supported portion in the circumferential direction. That is, the wall portion and the supported portion may contact in the circumferential direction. The wall portion may be provided on only one of both circumferential sides of the supported portion. In the said embodiment, although the wall part was used as a part of insulator, it is not restricted to this. The wall portion is not particularly limited as long as it is a part of the stator, and may be a separate member from the insulator. The wall may not be provided. The number of supported portions is not particularly limited. The supported portion may be supported by the insulator.

  In the embodiment described above, the insertion hole is a hole that penetrates the bus bar holder, but is not limited to this. The insertion hole may be a hole having a bottom. Also, the insertion hole may not be provided. In this case, the connection terminal portion of the bus bar may extend upward and be connected to an electrical component such as a control device.

  The portion of the bus bar from the inspection portion to the connection terminal portion and the portion of the bus bar from the inspection portion to the coil connection portion may not be embedded in the bus bar holder, and the upper side is not covered by the bus bar holder May be The exposed area of the inspection part may be the same as the exposed area of the connection terminal part or may be smaller than the exposed area of the connection terminal part. The tube portion may not be provided. The hole may not be provided. The shape of the inspection unit is not particularly limited, and may be, for example, a polygonal shape. The number of inspection units is not particularly limited. The plurality of inspection units may be arranged at different positions in the axial direction.

  The number of power grids is not particularly limited as long as it is one or more. That is, the motor may be a multi-system motor or a single-system motor.

  In addition, the application of the motor of embodiment mentioned above is not specifically limited. Moreover, each structure mentioned above can be combined suitably in the range which does not contradiction mutually.

  DESCRIPTION OF SYMBOLS 10, 110 ... Motor, 20 ... Rotor, 21 ... Shaft, 30 ... Stator, 35 ... Coil, 35a ... Coil leader line (lead wire), 40a ... 1st through hole, 40b ... 2nd through hole, 60, 160 ... busbar Holder, 64A, 64B, 64C ... cylinder part, 65A, 65B, 65C ... hole part 70: bus bar, 72A, 72B, 72C ... inspection part, 75A, 75B, 75C ... coil connection part, 80 ... control device (power supply device ), 70Aa, 70Ba, 70Ca ... connection terminal portion, IA ... inspection terminal, J ... central axis

Claims (13)

A rotor having a shaft disposed along a central axis,
A stator having a plurality of coils and facing the rotor in the radial direction via a gap;
A bus bar electrically connected to the stator;
A bus bar holder disposed on one side in the axial direction of the stator and holding the bus bar;
Equipped with
A part of the bus bar is embedded in the bus bar holder and the one axial side is covered by the bus bar holder.
The bus bar is
A connection terminal portion exposed to the outside of the bus bar holder and electrically connected to a power supply device for supplying power to the stator;
A coil connection portion exposed to the outside of the bus bar holder and connected to a conductive wire extending from the coil;
An inspection unit that is exposed to the one side in the axial direction of the bus bar holder and electrically connectable to an inspection terminal that supplies power to the stator;
Has a motor.   At least a portion of a portion of the bus bar between the inspection portion and the connection terminal portion, and at least a portion of a portion of the bus bar between the inspection portion and the coil connection portion are connected to the bus bar holder. The motor according to claim 1, wherein the motor is embedded and covered with the bus bar holder at one axial side. The bus bar holder has a hole recessed from the one axial side to the other axial side,
The motor according to claim 1, wherein the inspection unit constitutes at least a part of a bottom surface of the hole. The bus bar holder has a tubular portion opened in the axial direction, and
The motor according to claim 3, wherein an inside of the hole is constituted by an inside of the cylinder.   The motor according to claim 4, wherein an end on one axial side of the cylindrical portion is disposed on the other axial side with respect to the coil connection portion. The connection terminal portion is exposed to one side of the bus bar holder in the axial direction,
The motor according to any one of claims 1 to 5, wherein an exposed area of the inspection section is larger than an exposed area of the connection terminal section.   The motor according to any one of claims 1 to 6, wherein the inspection unit is circular when viewed from the one side in the axial direction. A plurality of bus bars are provided,
The motor according to any one of claims 1 to 7, wherein the bus bar holder holds two or more of the bus bars.   The motor according to claim 8, wherein in two or more of the bus bars held by the bus bar holder, axial positions of the inspection units are the same. The inspection unit
An inspection unit positioned radially inward of the connection terminal portion;
An inspection unit positioned radially outward of the connection terminal portion;
The motor according to claim 8 or 9, comprising   The at least one of the two or more bus bars held by the bus bar holder is disposed straddling the radial outside of the connection terminal portion from the radial inside of the connection terminal portion. The motor according to any one of to 10.   The motor according to any one of claims 8 to 11, wherein at least two of the two or more bus bars held by the bus bar holder have portions overlapping each other when viewed in the axial direction. The bus bar holder further includes a lid portion covering the one side in the axial direction,
The lid has a first through hole and a second through hole axially penetrating the lid.
The first through hole overlaps the connection terminal portion as viewed in the axial direction,
The motor according to any one of claims 1 to 12, wherein the second through hole overlaps with the inspection portion as viewed in the axial direction.

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