CN109586472A - Bus bar unit and motor - Google Patents

Abstract

Bus bar unit and motor, bus bar unit include busbar retainer；Busbar is mutually used, the axial side of busbar retainer is fixed on；Neutral point busbar is fixed on the axial other side of busbar retainer, is mutually respectively provided with busbar and neutral point busbar: busbar main part, circumferentially；Multiple coil terminals, they extend to radial side relative to busbar main part and connect with the lead-out wire drawn from stator, direction that neutral point busbar coil is extended with terminal relative to busbar main part and with busbar coil with terminal be mutually the same direction radially relative to the direction that busbar main part extends, neutral point busbar is plate, the at least busbar main part of neutral point busbar as thickness direction axially to be configured, busbar retainer, which has, to be axially protruded and the first wall portion circumferentially, first wall portion is when from end on observation between the busbar main part and lead-out wire of neutral point busbar.

Description

Bus bar unit and motor

Technical field

The present invention relates to bus bar units and motor.

Background technique

There is known following motors: being provided with busbar (the Japanese Unexamined Patent Publication 2016-208562 for carrying out wiring each other to coil Number bulletin 1).On the other hand, in recent years, there is the exploitation of the motor of multiple busbars for the purpose of ensuring redundancy etc. It carries out.

If increasing the quantity of busbar, have the following problems: bus-bar structure complicates, thus it is difficult to ensure that converging Flow the insulation of item with the lead-out wire drawn from coil.

Summary of the invention

In view of the above subject, one of its goals is to be provided it is easy to ensure that drawing with from coil one embodiment of the present invention Lead-out wire insulating properties bus bar unit.

Bus bar unit of the invention is set to motor, wherein the bus bar unit includes busbar retainer, sets It is placed in the upside of stator, which annularly configures around central axis extended in the vertical direction；Busbar is mutually used, is fixed In the axial side of the busbar retainer；And neutral point busbar, it is fixed on the axial direction of the busbar retainer The other side, phase busbar and the neutral point busbar are respectively provided with: busbar main part, circumferentially；With And multiple coil terminals, they extend to radial side relative to the busbar main part and with drawn from the stator Lead-out wire connection, the direction that the coil terminal described in the neutral point busbar extends relative to the busbar main part With with the direction that terminal extends relative to the busbar main part be radially in phase coil described in busbar The same direction, the neutral point busbar are plate, and at least described busbar main part of the neutral point busbar is with axial direction It being configured as thickness direction, the busbar retainer, which has, to be axially protruded and the first wall portion circumferentially, First wall portion is when from end on observation positioned at the busbar main part of the neutral point busbar and the lead-out wire Between.

According to one method of the present invention, it is capable of providing the remittance it is easy to ensure that with the insulating properties for the lead-out wire drawn from coil Flow a unit.In addition, according to one method of the present invention, the motor with above-mentioned bus bar unit is able to suppress cost.

The present invention can be more clearly understood that referring to attached drawing by the detailed description of the preferred embodiment for the present invention below Above-mentioned and other feature, element, step, features and advantages.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the motor of an embodiment.

Fig. 2 is the top view of the stator of an embodiment.

Fig. 3 is the schematic diagram for showing the wiring of each coil of stator of an embodiment.

Fig. 4 is the schematic diagram for showing the Y wiring for the two systems that the coil of an embodiment is constituted.

Fig. 5 is the perspective view of the bus bar unit of an embodiment.

Fig. 6 is the exploded perspective view of the bus bar unit of an embodiment.

Fig. 7 is the top view of the bus bar unit of an embodiment.

Fig. 8 is the cross-sectional view along the VIII-VIII line of Fig. 7.

Fig. 9 is the bottom view of the bus bar unit of an embodiment.

Figure 10 is the schematic cross-sectional view along the X-X line of Fig. 9.

Figure 11 is the schematic diagram for showing the electric power steering apparatus of an embodiment.

Specific embodiment

Hereinafter, being illustrated referring to motor of the attached drawing to embodiments of the present invention.In addition, the scope of the present invention is not limited to The following embodiments and the accompanying drawings can be changed arbitrarily within the scope of the technical idea of the present invention.In addition, in the following figures, For ease of understanding each structure, make sometimes actual construction from each construction scale bar and quantity etc. it is different.

In the drawings, XYZ coordinate system is suitably shown as three-dimensional orthogonal coordinate system.In XYZ coordinate system, Z-direction For the direction parallel with the axial direction of central axis J shown in FIG. 1.X-direction is the direction vertical with Z-direction, is a left side of Fig. 1 Right direction.Y direction is the direction vertical with both X-direction and Z-direction.

In the following description, the positive side (side+Z) of Z-direction is known as " upside ", by negative one of Z-direction Side (side-Z) is known as " downside ".In addition, the upper side and lower side is only for the direction of explanation, not to actual positional relationship and side To being defined.In addition, the direction (Z-direction) parallel with central axis J is referred to as " axis as long as no special explanation To " or " up and down direction ", the radial direction centered on central axis J is referred to as " radial direction ", it will be centered on central axis J Circumferentially, " circumferential direction " is referred to as around the direction of central axis J.Also, in the following description, so-called " vertical view " refers to from axis To the state of observation.

[motor]

Fig. 1 is the cross-sectional view of the motor 1 of present embodiment.The motor 1 of present embodiment is three-phase alternating current motor.In addition, The motor 1 of present embodiment is the motor of inner-rotor type.

Motor 1 has rotor 20, stator 30, bus bar unit 60, the shell 40, upside bearing (bearing) of axis 21 6A, lower side bearing 6B and bearing retainer 10.The external connection terminals that motor 1 passes through the extension from bus bar unit 60 to upside 71c, 72c, 73c and external equipment (control unit) 9 connect.Motor 1 controls the rotation of rotor 20 by external equipment 9.

[shell]

Shell 40 is the tubular being open in upside (side+Z).Shell 40 stores rotor 20 and stator 30.Shell 40 has cylinder Shape portion 45, bottom 49 and downside bearing cage 48.

Cylindrical portion 45 surrounds stator 30 from radial outside.In the present embodiment, cylindrical portion 45 is during to be with central axis J be The cylindrical shape of the heart.Bottom 49 is located at the lower end of cylindrical portion 45.Bottom 49 is located at the downside of stator 30.Downside bearing cage 48 In the vertical view center of bottom 49.Downside bearing cage 48 keeps lower side bearing 6B.Downside bearing cage 48 has The holding canister portion 48a that is extended in the axial direction centered on central axis J and from keeping the lower end of canister portion 48a to extend to radially inner side Lower end protruding portion 48b.In lower end protruding portion 48b vertical view center be provided with along axially through hole portion 48c.

[rotor]

Rotor 20 is pivoted about with central axis J.Rotor 20 has axis 21, rotor core 24 and rotor magnet 23.Axis 21 is configured centered on the central axis J extended in (axial direction) in above-below direction along central axis J.Axis 21 is by upper shaft 6A and lower side bearing 6B bearing is held as that can rotate around central axis J.

Rotor core 24 is fixed on axis 21.Rotor core 24 circumferentially surrounds axis 21.Rotor magnet 23 is fixed on rotor iron Core 24.In more detail, rotor magnet 23 is fixed on the lateral surface in the circumferential direction along rotor core 24.Rotor core 24 and turn Sub- magnet 23 rotates together with axis 21.

[upside bearing and lower side bearing]

Upside bearing 6A can rotate the axis 21 for being set to rotor 20 bearing in the upside of rotor core 24.Upper shaft It holds 6A and is supported on bearing retainer 10.Lower side bearing 6B supports the axis 21 for being set to rotor 20 in the downside of rotor core 24 It can rotate.Lower side bearing 6B is supported on the downside bearing cage 48 of shell 40.

[bearing retainer]

Bearing retainer 10 is located at the upside (side+Z) of stator 30.Illustrate later in addition, bearing retainer 10 is located at The upside of bus bar unit 60.Bearing retainer 10 keeps upside bearing 6A.In addition, bearing retainer 10 is held in outside The cylindrical portion 45 of shell 40.Vertical view (face the XY view) shape of bearing retainer 10 is, for example, the circle concentric with central axis J.

Bearing retainer 10 has disk-shaped bearing retainer main part 16, positioned at the diameter of bearing retainer main part 16 The fitting cylinder section 15 of upside bearing maintaining part 18 inwardly and the radial outside positioned at bearing retainer main part 16.Upside Bearing cage 18, bearing retainer main part 16 and fitting cylinder section 15 are sequentially matched from radially inner side towards outside according to this It sets.

Bearing retainer main part 16 extends along with axially vertical plane.It is provided on bearing retainer main part 16 Run through the through hole 16a of insertion for external connection terminals 71c, 72c, 73c of bus bar unit 60.

Upside bearing maintaining part 18 keeps upside bearing 6A.Upside bearing maintaining part 18 is located at bearing retainer 10 Vertical view center.Upside bearing maintaining part 18 have the holding canister portion 18a that is extended in the axial direction centered on central axis J and from The upper end tab 18b for keeping the upper end of canister portion 18a to extend to radially inner side.Upper end tab 18b is by upside bearing 6A upper Lower section positions upwards.Upper end tab 18b vertical view center be provided with along axially through hole portion 18c.It is passed through in hole portion 18c Wear the upper end inserted with axis 21.

Fitting cylinder section 15 extends from the outer rim of bearing retainer main part 16 to downside.Fitting cylinder section 15 is circumferentially cylindrical in shape Extend.Fitting cylinder section 15 and the inner peripheral surface 45c of cylindrical portion 45 are opposed and chimeric radially.Bearing retainer 10 is fixed as a result, In shell 40.

[stator]

Stator 30 is annularly configured around central axis J.Stator 30 is opposed radially across gap with rotor 20.Stator 30 Surround the radial outside of rotor 20.Stator 30 is fixed on the inner peripheral surface 45c of the cylindrical portion 45 of shell 40.Stator 30 has stator iron Core 31, upside insulating part (insulating part) 35, lower-side insulation part 34 and coil 33.

Fig. 2 is the top view of stator 30.In addition, illustrating the coil terminal of aftermentioned bus bar unit 60 in Fig. 2 A part of 71a, 72a, 73a, 81a, 82a.

Stator core 31 is made of the multiple iron core pieces 32 circumferentially annularly arranged.In stator core 31, in circumferential direction Upper adjacent iron core piece 32 is connected to each other.That is, stator core 31 is circumferentially to link multiple iron core pieces 32 and constitute.

Iron core piece 32 has core-back 32a, teeth portion 32b and umbrella portion 32c.That is, stator core 31 has multiple iron cores Back 32a, multiple teeth portion 32b and multiple umbrella portion 32c.The stator core 31 of present embodiment is made of 12 iron core pieces 32. Therefore, the stator 30 of present embodiment has 12 teeth portion 32b.In addition, the quantity of iron core piece 32 and teeth portion 32b are without being limited thereto.

Core-back 32a is circumferentially.Core-back 32a is in the iron towards circumferential end and adjacent iron core piece 32 Core back 32a connection.Core-back 32a adjacent to each other is combined each other by welding etc. in the circumferential.All iron as a result, The core-back 32a of chipware 32 is annularly combined.

Teeth portion 32b extends from the circumferential center of core-back 32a towards radially inner side.It is exhausted across upside on teeth portion 32b Edge part 35 and lower-side insulation part 34 and be wound with coil 33.

Umbrella portion 32c is located at the front end (radially inner side end) of teeth portion 32b.The size of umbrella portion 32c circumferentially is than the edge teeth portion 32b Circumferential size is big, smaller than the size of core-back 32a circumferentially.The face towards radially inner side of umbrella portion 32c and rotor 20 Rotor magnet 23 is opposed.

In addition, the stator core 31 of present embodiment is made of multiple iron core pieces 32 as so-called segmentation iron core.So And the iron core piece for constituting stator core 31 is also possible to adjacent core-back 32a and is partly connected to each other, convolute coil 33 it The curling iron core of buckling annular in shape afterwards.

As shown in Figure 1, upside insulating part 35 covers the upside of at least teeth portion 32b on the upper surface of stator core 31.Together Sample, lower-side insulation part 34 covers the downside of at least teeth portion 32b on the lower surface of stator core 31.That is, upside insulating part 35 The upper surface of teeth portion 32b is covered, lower-side insulation part 34 covers the lower surface of teeth portion 32b.Upside insulating part 35 and lower-side insulation part 34 are made of the material with insulating properties.Upside insulating part 35 and lower-side insulation part 34 are in addition to being set to the upper and lower of stator core 31 Except contrary side this point, structure having the same.

As shown in Fig. 2, upside insulating part 35 has multiple insulating trips 36 positioned at the upside of each iron core piece 32.In addition, Although illustration omitted, lower-side insulation part 34 has multiple insulating trips 36 in the same manner as upside insulating part 35.

Quantity (being in the present embodiment 12) identical with iron core piece 32 is arranged in the insulating trip 36 of upside insulating part 35. An insulating trip 36 is configured in the upside of an iron core piece 32.The circumferentially arrangement annular in shape of multiple insulating trips 36.

Insulating trip 36 has base portion 36b, the first standing wall portion 36a and the second standing wall portion 36c.Base portion 36b is located at teeth portion 32b Upside, cover teeth portion 32b upper surface.The end of first standing wall portion 36a from the radial outside of base portion 36b is upwardly projecting simultaneously Circumferentially.First standing wall portion 36a is located at the upside of core-back 32a.The diameter of second standing wall portion 36c from base portion 36b is inside The end of side is upwardly projecting and circumferentially.Second standing wall portion 36c is located at the upside of umbrella portion 32c.

Coil 33 is wound on base portion 36b.First standing wall portion 36a and the second standing wall portion 36c is across base portion 36b in radial direction It is upper opposed.First standing wall portion 36a and the second standing wall portion 36c is respectively from radial outside and inside to the coil for being wound in base portion 36b 33 guide.

First standing wall portion 36a has a pair of of end face 36d towards circumferential two sides and the outer peripheral surface towards radial outside 36e.The end face 36d of adjacent insulating trip 36 is opposed in the circumferential.It is provided between the first standing wall portion 36a and outer peripheral surface 36e Chamfering 36f.It is stored when being provided between the chamfering 36f of adjacent insulating trip 36 from end on observation for the leg of V shape Portion 37.That is, being provided with leg incorporating section 37 on upside insulating part 35.

In the past, there is known the recess portions on the outer peripheral surface towards radial outside that will be set to an insulating trip receives as leg Receive the construction in portion.In contrast, according to the present embodiment, by making the chamfering 36f of a pair of of the insulating trip 36 arranged in the circumferential It docks radially and leg incorporating section 37 is set.It therefore, there is no need to that recess portion is arranged on an insulating trip 36, passing through injection molding Molding in the case where manufacturing insulating trip 36, can be improved the freedom degree of the stripping direction of insulating trip 36.As a result, can be honest and clean Manufacture to valence insulating trip 36.

It is open when leg incorporating section 37 is from end on observation in radial side (being radial outside in present embodiment) And with towards the other side (being in the present embodiment radially inner side) and V shape that width narrows.Leg incorporating section 37 from Positioned at the upside of the adjacent mutual boundary portion of iron core piece 32 when end on observation.

The leg 65 of the bus bar unit 60 illustrated later is accommodated in leg incorporating section 37.Leg 65 is embedded in leg The V shape of incorporating section 37.That is, leg 65 when from end on observation for towards the radial other side (in the present embodiment for Radially inner side) and V shape that width narrows.

Coil 33 is that the coil coil of wire is around in teeth portion 32b and structure and via upside insulating part 35 and lower-side insulation part 34 At.Therefore, multiple coils 33 circumferentially arrangement annular in shape.

In the present embodiment, 12 coils 33 are provided on stator 30.12 coils 33 are to make a pair of of coil 33 Made of for 1 group, even arc is wound.Even two coils 33 of arc winding are connected via overlap joint line 33b.Overlap joint line 33b passes through line The upside of circle 33.In addition, overlap joint line 33b is insulated by insulation tube (illustration omitted) relative to coil 33.

One lead-out wire 33a extends from each coil 33 to upside.Lead-out wire 33a and even two coils 33 of arc winding It is corresponding with winding terminal to wind beginning.Therefore, extend a lead-out wire 33a from a coil 33.Lead-out wire 33a with later The coil of explanation is connected with terminal 71a, 72a, 73a, 81a, 82a.In addition, coil terminal 71a, 72a, 73a, 81a, 82a quilt It is categorized into mutually with the coil of busbar 71,72, the 73 coil end of terminal 71a, 72a, 73a and neutral point busbar 81,82 Sub- 81a, 82a.

Fig. 3 is the schematic diagram for showing the wiring of each coil 33 of stator 30.12 coils 33 of stator 30 are by four U phase lines Enclose U1a, U1b, U2a, U2b, four V phase coil V1a, V1b, V2a, V2b and four W phase coil W1a, W1b, W2a, W2b structures At.

Fig. 4 is the schematic diagram for showing the Y wiring for the two systems that 12 coils 33 are constituted.As shown in figure 4, stator 30 will U phase coil, V phase coil and W phase coil as a system coil group and have multiple systems (in the present embodiment for Two systems) coil group (coil group 7 of the first system and the coil group 8 of second system).It is classified into that is, stator 30 has The coil group 7,8 of the two systems of the coil group of the coil group 7 and second system of the first system.

The coil group 7 of the first system has U phase coil U1a, U1b, V phase coil V1a, V1b and W phase coil W1a, W1b. In addition, the coil group 8 of second system has U phase coil U2a, U2b, V phase coil V2a, V2b and W phase coil W2a, W2b.That is, There are two coils 33 for setting in a phase of each system.Two coils 33 of each phase of each system are by overlapping line 33b company It connects.In other words, in each system, U phase coil, V phase coil and W phase coil be respectively arranged with it is multiple, via overlap joint line 33b It is arranged across multiple teeth portion 32b.

In the coil group 7 of the first system, U phase coil U1a, U1b, V phase coil V1a, V1b and W phase coil W1a, W1b Pass through Y wiring wiring each other.Similarly, in the coil group of second system 8, U phase coil U2a, U2b, V phase coil V2a, V2b and W phase coil W2a, W2b passes through Y wiring wiring each other.

As shown in figure 3, a side in two U phase coils U1a, U1b of the first system for being connected via overlap joint line 33b Lead-out wire 33a is mutually connect with the U phase of buss-bar set 70A with busbar 71A with aftermentioned the first system, the lead-out wire of another party 33a is connect with the first system neutral point busbar 81.

Similarly, via the extraction of the side in two V phase coils V1a, V1b of the first system of overlap joint line 33b connection Line 33a is mutually connect with the V phase of buss-bar set 70A with busbar 72A with the first system, the lead-out wire 33a of another party and the first system Neutral point busbar 81 of uniting connects.

In addition, via the lead-out wire of the side in two W phase coils W1a, W1b of the first system of overlap joint line 33b connection 33a is mutually connect with the W phase of buss-bar set 70A with busbar 73A with the first system, the lead-out wire 33a and the first system of another party Neutral point busbar 81 connects.

As described above, U phase coil U1a, U1b, V phase coil V1a, V1b, W phase coil W1a of the first system, One end of W1b is mutually connect with busbar 71,72,73 with different.That is, multiple phases with busbar 71,72,73 with from each phase Coil 33 draw lead-out wire 33a be separately connected.In addition, U phase coil U1a, U1b, V phase coil V1a, V1b of the first system, The other end of W phase coil W1a, W1b are connect with the first system neutral point busbar 81.That is, a first system neutral point confluence Item 81 is connect with the lead-out wire 33a drawn from the coil 33 of each phase.

U phase coil U1a, U1b, V phase coil V1a, V1b and W phase coil W1a, W1b of the first system constitute Y and connect as a result, Line.

Each phase of the coil group 7 of the wiring construction and the first system of the coil 33 of each phase of the coil group 8 of second system The wiring construction of coil is identical.That is, the U phase of U phase coil U2a, U2b of second system and second system busbar 71B and Two system neutral point busbar 82 connects.V phase coil V2a, V2b of second system and the V phase of second system use busbar 72B and Second system neutral point busbar 82 connects.The W phase busbar 73B of W phase coil W2a, W2b of second system and second system It is connected with second system neutral point busbar 82.As a result, U phase coil U2a, U2b, V phase coil V2a, V2b of second system and W phase coil W2a, W2b constitute Y wiring.

According to the present embodiment, stator 30 has the coil group (coil group 7 and second system of the first system of multiple systems Coil group 8).In addition, the coil group 7,8 of system different from each other is symmetrically matched around central axis J each other in stator 30 It sets.Thereby, it is possible to ensure the redundancy of motor 1.That is, even if any one generation in the coil group 7,8 of multiple systems not In the case where good situation, it is able to use the coil group of other systems also come the motor 1 that smoothly drives.

[bus bar unit]

Bus bar unit 60 is set to motor 1.Bus bar unit 60 is presented axially in stator 30 and bearing retainer 10 Between.That is, bus bar unit 60 is set to the downside of the upside of stator 30 and bearing retainer 10.

Fig. 5 is the perspective view of bus bar unit 60.Fig. 6 is the exploded perspective view of bus bar unit 60.Fig. 7 is busbar list The top view of member 60.

Bus bar unit 60 have busbar retainer 61, a pair of terminal supporting member (external connection terminals supporting member) 66, The first system mutually mutually uses buss-bar set 70B, the first system neutral point busbar 81 and with buss-bar set 70A, second system Two system neutral point busbar 82.

The first system mutually uses the coil group 7 of buss-bar set 70A and the first system neutral point busbar 81 and the first system to connect It connects.In addition, second system mutually uses the coil group 8 of buss-bar set 70B and second system neutral point busbar 82 and second system to connect It connects.

The first system is mutually mutually fixed on busbar retainer 61 with buss-bar set 70B with buss-bar set 70A and second system Axial side (being in the present embodiment upside), the first system neutral point busbar 81 and second system neutral point busbar 82 are fixed on the axial other side (being in the present embodiment downside) of busbar retainer 61.In addition, in the present specification, " side " and " other side " is not offered as specific direction.That is, it is as follows that above-mentioned record, which can change speech,.The first system neutral point Busbar 81 and second system neutral point busbar 82 are fixed on the axial side of busbar retainer 61, and the first system is mutually used foreign currency Stream item group 70A and second system are mutually fixed on the axial other side of busbar retainer 61 with buss-bar set 70B.

In addition, the first system mutually has U phase busbar 71A, V phase busbar 72A and W phase with buss-bar set 70A With busbar 73A.Similarly, second system mutually with buss-bar set 70B have U phase with busbar 71B, V phase use busbar 72B with And W phase busbar 73B.

In the following description, in the case where not differentiating between U phase busbar 71A, 71B of not homologous ray, referred to as U phase With busbar 71.In addition, referred to as V phase is converged in the case where not differentiating between V phase busbar 72A, 72B of not homologous ray Item 72.In the case where not differentiating between W phase busbar 73A, 73B of not homologous ray, referred to as W phase busbar 73.Also, In the case where not differentiating between U phase busbar 71, V phase busbar 72 and W phase busbar 73, busbar is referred to as mutually used 71,72,73.Similarly, the case where not differentiating between the first system neutral point busbar 81 and second system neutral point busbar 82 Under, referred to as neutral point busbar 81,82.

U phase is mutually with confluence with busbar 71A, 71B, V phase with busbar 72A, 72B and W phase with busbar 73A, 73B Item (the first busbar).That is, multiple phases include and the coil group 7 of the first system and the line of second system with busbar 71,72,73 Respective U phase coil U1a, U1b, U2a, U2b, V phase coil V1a, V1b, V2a, V2b and W phase coil the W1a, W1b of circle group 8, What W2a, W2b were separately connected mutually uses busbar.

(busbar retainer)

As shown in Figure 1, busbar retainer 61 is set to the upside of stator 30.61 pairs of busbar retainer are mutually used busbar 71,72,73 and neutral point busbar 81,82 kept.Busbar retainer 61 is made of resin material.

As shown in fig. 6, busbar retainer 61 has retainer main part (busbar holding frame body) 62, a pair of base Portion 63, multiple (being in the present embodiment 6) clamping parts 64 and multiple (being in the present embodiment 6) legs 65.

Retainer main part 62 is the annulus shape centered on central axis J when from end on observation.Keep frame body Portion 62 is presented axially in mutually between busbar 71,72,73 and neutral point busbar 81,82.In addition, retainer main part 62 With towards upper surface 62a to the upper side and towards the lower surface 62b of downside.Match on the upper surface 62a of retainer main part 62 It is equipped with multiple phase busbars 71,72,73.Converge on the lower surface 62b of retainer main part 62 configured with multiple neutral points Item 81,82.

As shown in Figure 1, being provided with the first wall portion 62c and the second wall portion 62d in the lower surface 62b of retainer main part 62. That is, busbar retainer 61 has the first wall portion 62c and the second wall portion 62d.First wall portion 62c and the second wall portion 62d is from following table Face 62b is axially protruded.In addition, the first wall portion 62c and the second wall portion 62d difference is circumferentially.First wall portion 62c relative to Neutral point busbar 81,82 is located at radial outside.Second wall portion 62d is located at radially inner side relative to neutral point busbar 81,82. Therefore, neutral point busbar 81,82 is radially positioned between the first wall portion 62c and the second wall portion 62d and circumferentially.

It is provided with multiple axle portion 67a, 68a, 69a on the lower surface 62b of retainer main part 62 and is located at each axle portion Multiple weld portion 67b, 68b, 69b of the front end of 67a, 68a, 69a.That is, busbar retainer 61 have multiple axle portion 67a, 68a, 69a and multiple weld portion 67b, 68b, 69b.As hereinafter according to Figure 10 and as being illustrated, multiple weld portion 67b, Neutral point busbar 81,82 is fixed on busbar retainer 61 by 68b, 69b.

As shown in fig. 6, the upper surface 62a of base portion 63 from retainer main part 62 is upwardly projecting.A pair of base portion 63 It is located at opposite side across central axis J.A side in a pair of base portion 63 mutually uses the first system the outside of buss-bar set 70A Connection terminal 71c, 72c, 73c are kept, another party second system is mutually used buss-bar set 70B external connection terminals 71c, 72c, 73c are kept.

Base portion 63 has towards upper surface 63a to the upper side.It is supported on the upper surface 63a of base portion 63 equipped with terminal Part 66.There are four groove (recess portion) 63d for setting on the 63a of upper surface.That is, fluted 63d is arranged on busbar retainer 61. Inserted with V phase a part of busbar 72, W phase a part of busbar 73 and different from each other in four groove 63d Two U phases of system with busbar 71, (the U phase of the first system is with the U phase busbar 71B of busbar 71A and second system) A part.Base portion 63 keeps multiple phases with busbar 71,72,73 as a result,.

As shown in Figure 1, being provided with the axle portion 63b extended to upside on the upper surface 63a of base portion 63 and being located at axle portion The weld portion 63c of the upper end of 63b.That is, busbar retainer 61 has axle portion 63b and weld portion 63c.

Axle portion 63b is by being set to the fixation hole 66h of terminal supporter 66.Weld portion 63c consolidates terminal supporter 66 The upside for determining hole 66h extends to the outside of fixation hole 66h when from end on observation.Weld portion 63c is the hemisphere to upside protrusion Shape.Weld portion 63c is the upper end by axle portion 63b because heat melts to molding.Weld portion 63c inhibits terminal supporter 66 extract from axle portion 63b.By the way that weld portion 63c is arranged, terminal supporter 66 is fixed on busbar retainer 61.

As shown in fig. 7, clamping part 64 is set to the upper surface 62a of retainer main part 62.Clamping part 64 has from upper table A pair of of claw 64a that face 62a extends to upside.A pair of of claw 64a is mutually gone forward side by side with busbar 71,72,73 from thickness direction clamping Row is kept.That is, clamping part 64 keeps multiple phase busbars 71,72,73 from thickness direction.In the present embodiment, clamping part 64 are provided with the upside that is set to busbar retainer 61 mutually with the identical quantity (6) of busbar 71,72,73.Therefore, One phase is kept with busbar 71,72,73 by a clamping part 64.In addition, the quantity of clamping part 64 can also be more than 6 It is a.

Leg 65 is provided with multiple (being in the present embodiment 6) on busbar retainer 61.Multiple legs 65 around Central axis equally spaced configures.Busbar retainer 61 is supported on stator 30 by leg 65.

As shown in fig. 6, leg 65 has the radial extension extended from the outer rim of retainer main part 62 to radial outside The lower extension 65b that 65a and radial outside front end from radial extension 65a extend to downside.I.e., leg 65 is relative to guarantor Frame body portion 62 is held to extend to downside.

As shown in figure 9, the lower end 65c of leg 65 when from end on observation for towards radially inner side and width narrows V shape.As shown in Fig. 2, the lower end 65c of V shape is accommodated in the leg incorporating section 37 for being set to upside insulating part 35.Separately Outside, leg 65 contacts on lower end surface with the upper surface of stator 30.As described above, leg incorporating section 37 is when from end on observation With the lower end 65c same shape of leg 65 or the V shape of similar shape.It is accommodated in leg incorporating section 37 by leg 65, In axially vertical face, busbar retainer 61 is positioned relative to stator 30.

Leg incorporating section 37 is set to the upside of the circumferential adjacent mutual boundary portion of iron core piece 32.It is accommodated in leg receipts Receiving the leg 65 in portion 37 is set to the upside of the circumferential adjacent mutual boundary portion of iron core piece 32.That is, leg 65 is configured to When from end on observation with the circumferential adjacent mutual border overlay of iron core piece 32.

According to the present embodiment, the lower end 65c of leg 65 and leg incorporating section 37 are wide with the radial side of direction The V shape to narrow is spent, thus, it is possible to be easy to carry out insertion of the leg 65 relative to leg incorporating section 37.In addition, each leg 65 It is contacted from the end on observation of the circumferential side and the other side towards leg incorporating section 37 with the wall portion of V shape.Therefore, can Improve the positioning accuracy in the circumferential direction of busbar retainer 61.In addition, the shape other than leg incorporating section 37 or V shape Shape.For example, even if can also obtain identical effect to be trapezoidal, semicircular arc-shaped.

As shown in Fig. 2, when from end on observation, lead-out wire 33a and central axis J that connection is drawn from each coil 33 Straight line as imaginary line VL.When from end on observation, leg 65 is located at the lead-out wire 33a of circumferential upper adjacent pair coil 33 Imaginary line VL between.In addition, lead-out wire 33a be respectively arranged at multiple phase busbars 71,72,73 and multiple neutrality The coil of point busbar 81,82 is connected with any one terminal in terminal 71a, 72a, 73a, 81a, 82a.

It according to the present embodiment, can between configuring a pair of of imaginary line VL for arranging in the circumferential by leg 65 Leg 65 and coil are in staggered configuration with terminal 71a, 72a, 73a, 81a, 82a in the circumferential.Thereby, it is possible to inhibit leg 65 with The interference of coil terminal 71a, 72a, 73a, 81a, 82a and lead-out wire 33a.In addition, leg 65 is not easy to hinder coil end The welding sequence of sub- 71a, 72a, 73a, 81a, 82a and lead-out wire 33a.

In the present embodiment, multiple coils are with terminal 71a, 72a, 73a, 81a, 82a circumferentially with the first interval and ratio First, which is spaced narrow second, alternates arrangement.Therefore, the multiple imaginary line VL extended radially from central axis J are circumferentially Alternately extended with first angle α and the second angle β smaller than first angle α.The leg 65 of present embodiment is located at into first jiao It spends between a pair of of imaginary line VL of α.Even if a pair of of imaginary line VL that leg 65 is configured at into first angle α each other it Between and at second angle β a pair of of imaginary line VL each other in either side in the case where, can also obtain inhibit leg Certain effect of the interference of 65 and lead-out wire 33a.In addition, as shown in the embodiment, by the way that leg 65 is configured at into the Between a pair of of imaginary line VL of one angle [alpha], the effect for inhibiting the interference of leg 65 and lead-out wire 33a can be further increased Fruit.

In addition, leg 65 is located to be connect with the lead-out wire 33a of circumferential upper adjacent pair coil 33 when from end on observation A pair of of coil between terminal (such as a pair of of coil terminal 81a, 73a).According to the present embodiment, even if in 65 He of leg For coil under the radial position unanimous circumstances of terminal 81a, 73a, leg 65 and coil are also wrong in the circumferential with terminal 81a, 73a Configuration is opened, therefore is able to suppress the interference of leg 65 and coil terminal 81a, 73a.

In addition, according to the present embodiment, by above-mentioned configuration inhibit leg 65 and coil terminal 71a, 72a, The interference of 73a, 81a, 82a, therefore do not need to keep leg 65 and coil terminal 71a, 72a, 73a, 81a, 82a wrong in the axial direction Open configuration.More specifically, as shown in figure 5, can by a part of leg 65 with a part coil with terminal 82a in axis The mode being overlapped upwards is configured.By by least part of leg 65 be overlapped in the axial direction with terminal 82a with coil Mode configured, in the axial direction compact in size of bus bar unit 60 can be made.

(mutually using busbar (the first busbar, busbar))

Multiple phase busbars 71,72,73 are fixed on the upside of busbar retainer 61.Multiple phases busbar 71,72, 73, which are classified into the first system, mutually mutually uses buss-bar set 70B with second system with buss-bar set 70A.As described above, the first system Mutually with buss-bar set 70A and second system mutually with buss-bar set 70B be respectively provided with U phase busbar 71, V phase busbar 72 with And W phase busbar 73.

In addition, the first system is mutually with buss-bar set 70A with second system mutually with the U phase busbar 71 of buss-bar set 70B It is each other identical shape, the first system mutually mutually uses the V phase of buss-bar set 70B to converge with buss-bar set 70A with second system Item 72 is identical shape each other, and the first system is mutually mutually used with the W phase of buss-bar set 70B with buss-bar set 70A with second system Busbar 73 is identical shape each other.

As shown in fig. 6, U phase uses busbar 71 to have busbar main part 71b, coil terminal 71a, external connection terminals 71c and protruding portion 71e.Similarly, there is V phase busbar 72 busbar main part 72b, coil terminal 72a, outside to connect Connecting terminal 72c and protruding portion 72e.Also, W phase uses busbar 73 to have busbar main part 73b, coil terminal 73a, outer Portion connection terminal 73c and protruding portion 73e.

Busbar main part 71b, 72b, 73b extend along with axially vertical plane.Busbar main part 71b, 72b, 73b Respectively circumferentially.Busbar main part 71b, 72b, 73b with axially vertical direction as thickness direction to be matched It sets.

Coil is located at one end of busbar main part 71b, 72b, 73b with terminal 71a, 72a, 73a.Coil terminal 71a, 72a, 73a extend from busbar main part 71b, 72b, 73b to radial outside.In addition, coil terminal 71a, 72a, 73a It can also extend relative to busbar main part 71b, 72b, 73b to radially inner side.That is, coil is with terminal 71a, 72a, 73a To extend relative to busbar main part 71b, 72b, 73b to radial side.

Coil terminal 71a, 72a, 73a and lead-out wire 33a connection.Coil is to lead-out wire with terminal 71a, 72a, 73a The part that 33a is held.Coil is the substantially U-shaped being open to radially inner side with the plan view shape of terminal 71a, 72a, 73a. Coil uses terminal 71a, 72a, 73a to be configured with axially vertical direction as thickness direction.

External connection terminals 71c, 72c, 73c are located at the coil terminal with busbar main part 71b, 72b, 73b The end (other end) of 71a, 72a, 73a opposite side.External connection terminals 71c, 72c, 73c from busbar main part 71b, 72b, 73b extend to upside.

Three external connection terminals 71c, 72c, 73c are respectively arranged at the first system and mutually use buss-bar set 70A and the second system System mutually uses buss-bar set 70B.The first system mutually uses external connection terminals 71c, 72c, 73c and second system of buss-bar set 70A Mutually opposite side is configured at across central axis J with external connection terminals 71c, 72c, 73c of buss-bar set 70B.

External connection terminals 71c, 72c, 73c with axially vertical direction as thickness direction to be configured.In addition, U phase uses the external connection terminals 71c of busbar 71 using the direction vertical with radial direction as plate width direction to be configured.Another party External connection terminals 72c, 73c of face, V phase busbar 72 and W phase busbar 73 are connected with the outside with U phase busbar 71 The vertical direction of the plate width direction of connecting terminal 71c is configured as plate width direction.

As shown in fig. 6, protruding portion 71e, 72e, 73e are from busbar main part 71b, 72b, 73b and external connection terminals The interconnecting piece of 71c, 72c, 73c extend to the opposite side of busbar main part 71b.Protruding portion 71e, 72e, 73e with axial to hang down Straight direction is configured as thickness direction.

Mutually with busbar 71,72,73 in busbar main part 71b, 72b, 73b and external connection terminals 71c, 72c, 73c Interconnecting piece and protruding portion 71e, 72e, 73e in be inserted into groove (recess portion) 63d for being set to busbar retainer 61.Cause This, is mutually held in busbar retainer 61 with busbar 71,72,73 at the root of external connection terminals 71c, 72c, 73c.Cause This, can be steadily supported on by busbar retainer 61 external connection terminals 71c, 72c, 73c being inserted in external equipment The stress being subject to when socket.

In addition, according to the present embodiment, busbar main part 71b, 72b, 73b and protruding portion 71e, 72e, 73e are in outside Extend at the root of connection terminal 71c, 72c, 73c to the plate width direction two sides of external connection terminals 71c, 72c, 73c.Busbar Main part 71b, 72b, 73b and protruding portion 71e, 72e, 73e the inside of groove 63d inhibit external connection terminals 71c, 72c, Shaking of the 73c to plate width direction.Thereby, it is possible to improve external connection terminals 71c, 72c, 73c to external equipment socket insert The stability entered.

The entire width and protruding portion 71e, 72e of busbar main part 71b, 72b, 73b of phase busbar 71,72,73, The entire width of 73e is equal.Therefore, the stability of external connection terminals 71c, 72c, 73c be can be improved, so that it is outer to improve inhibition The effect of the shaking of the width direction two sides of portion connection terminal 71c, 72c, 73c.

As shown in fig. 7, U phase busbar 71 is three kinds mutually with the week along busbar main part in busbar 71,72,73 To the maximum phase busbar of length.The busbar main part 71b of U phase busbar 71, which is located at, mutually uses busbar (V than other Mutually with busbar 72 and W phase busbar 73) busbar main part 72b, 73b lean on the position of radially inner side.More specifically, The busbar main part 71b of U phase busbar 71 is located at the V phase busbar 72 for the buss-bar set for belonging to same system and belongs to The W phase of the buss-bar set of the other systems radially inner side of busbar 73.

Present embodiment is mutually overlapped in busbar main part 71b, 72b, 73b with busbar 71,72,73 radially Configuration.Therefore, it by configuring the thickness direction of busbar main part 71b, 72b, 73b with axially vertical, will can mutually use Busbar 71,72,73 compactly configures radially.As a result, the radial dimension of bus bar unit 60 can be made to minimize.

According to the present embodiment, circumferential length along busbar main part 71b of multiple phases in busbar 71,72,73 Spend maximum U phase with busbar 71 with other mutually in busbar (that is, V phase busbar 72 and W phase busbar 73) extremely Few a part is overlapped radially.It is radially mutually used with other in addition, the busbar main part 71b of U phase busbar 71 is located at The contrary side that coil terminal 72a, 73a of busbar are extended.Therefore, U phase uses the busbar master of busbar 71 Body portion 71b can be to be drawn with the coil of busbar 73 with what terminal 72a, 73a were connect relative to V phase busbar 72 and W phase The mode that outlet 33a is sufficiently spaced from distance radially is configured.As a result, without separating U phase busbar by wall etc. Between 71 busbar main part 71b and lead-out wire 33a, it will be able to ensure to insulate.

In the present embodiment, V phase with busbar 72 and W phase use busbar 73 coil terminal 72a, 73a radially Portion 64 is clamped in the region of extension to keep.On the other hand, U phase uses busbar 71 to be clamped portion in busbar main part 71b 64 keep.The clamping part 64 that U phase is kept with busbar 71 radially with V phase busbar 72 and W phase busbar 73 are not overlapped radially.That is, the length of circumferential direction along busbar main part 71b of multiple phases in busbar 71,72,73 is most Big U phase use busbar 71 with other mutually in busbar radially nonoverlapping region, busbar main part 71b quilt Clamping part 64 is kept.In other words, U phase uses the busbar main part 71b of busbar 71 in the region that not clamped portion 64 is kept Use busbar 73 be overlapped radially with V phase busbar 72 and W phase.Therefore, can radially by U phase busbar 71 with V phase is closely configured with busbar 72 with W phase with busbar 73.

U phase uses the busbar main part 71b of busbar 71 circumferentially to extend 180 ° around central axis J.Therefore, it is located at and converges Flow the external connection terminals 71c of one end of main part 71b and the coil terminal of the other end positioned at busbar main part 71b 71a is configured at opposite side across central axis J.Thereby, it is possible to make other, mutually with busbar, (V phase is used with busbar 72 with W phase Busbar 73) main part 72b, 73b size circumferentially become smaller, and external connection terminals for the system that is arranged 71c,72c,73c.In addition, in the present embodiment, to multiple phases in busbar 71,72,73 along busbar main part The case where circumferential maximum phase of length with busbar is U phase busbar 71 is illustrated.However, in V phase busbar Busbar main part 72b, 73b of 72 or W phase busbar 73 mutually uses the feelings of the busbar main body minister of busbar than other Under condition, as long as these mutually use busbar main part 72b, 73b of busbar 72,73 to extend 180 ° around central axis J.

In the present embodiment, not homologous ray and with phase mutually with the external connection terminals 71c of busbar 71,72,73, 72c, 73c are located at opposite side across central axis J each other.That is, with the coil group 7 of the first system and the coil group of second system 8 coil 33 either in phase with one another connect it is a pair of mutually with external connection terminals 71c, 72c, 73c of busbar 71,72,73 across Central axis J and be configured at opposite side.Thereby, it is possible to by three external connection terminals 71c of the first system and second system, 72c, 73c are symmetrically configured centered on central axis J.As a result, even if the circumferential position of motor 1 is made to rotate 180 °, Also motor 1 can be connect with external equipment, so as to simplify connection process of the motor 1 relative to external equipment.

When from end on observation, the U phase of the first system is used in busbar 71B with busbar 71A with the U phase of second system The external connection terminals 71c of one side and the coil of another party are partly overlapped when from end on observation with terminal 71a.U phase confluence The busbar main part 71b of 71A has the crank portion 71d extended in the axial direction near the root of external connection terminals 71c. By being provided with crank portion 71d on busbar main part 71b, the upward side offset of external connection terminals 71c, thus inhibit with Coil is interfered with terminal 71a.

As shown in fig. 6, busbar main part 72b, 73b of V phase busbar 72 and W phase busbar 73 do not have and U Mutually use the comparable part crank portion 71d of busbar 71.Therefore, V phase uses the busbar master of busbar 73 with busbar 72 with W phase Body portion 72b, 73b only with axially vertical plane in extend.

It is mutually using in busbar 71,72,73, busbar main part 71b, 72b, 73b and coil terminal 71a, 72a, 73a Be by make to a direction extend plate buckling and it is molding.In addition, V phase is with busbar 72 and W phase busbar 73 The entire width of busbar main part 72b, 73b are equal with the entire width of terminal 72a, 73a with coil.Therefore, passing through punching Pressure processing is come in the case where manufacturing V phase with busbar 72 and W phase busbar 73, with coil terminal relative to busbar main body The case where portion extends to upside or downside is compared, and can increase V phase from plate with busbar 72 and W phase busbar 73 Acquisition number.

(terminal supporter (external connection terminals supporting member))

Terminal supporter 66 is fixed on the upside of busbar retainer 61.Terminal supporter 66 covers busbar retainer 61 Base portion 63 upper surface 63a.Terminal supporter 66 is made of resin material.

Terminal supporter 66 has terminal supporter main part 66a, is in the form of a column from terminal supporter main part 66a to upside Three supporting part 66b extending, from the downward side terminal supporter main part 66a protrusion 66d outstanding.Supporting part 66b is cylinder Shape.Three supporting part 66b are circumferentially arranged.

As shown in Figure 1, be provided on terminal supporter main part 66a along axially through fixation hole 66h.In fixation hole Inserted with the axle portion 63b of busbar retainer 61 in 66h.

Be respectively arranged on three supporting part 66b along axially through retaining hole 66c.That is, in terminal supporter 66 There are three retaining hole 66c for setting.It is extended through in three retaining hole 66c inserted with U phase busbar 71, V phase busbar 72 and W phase external connection terminals 71c, 72c, 73c of busbar 73.Three retaining hole 66c are to external connection terminals as a result, 71c, 72c, 73c are kept.

External connection terminals 71c, 72c, 73c are inserted into from the downside of retaining hole 66c, prominent to the upside of supporting part 66b.Outside Portion connection terminal 71c, 72c, 73c pass through the through hole 16a of bearing retainer 10 in supporting part 66b area encompassed.

According to the present embodiment, external connection terminals 71c, 72c, 73c is kept by the retaining hole 66c of terminal supporter 66. Thereby, it is possible to the stability of external connection terminals 71c, 72c, 73c when improving the socket for being inserted in external equipment.

According to the present embodiment, external connection terminals 71c, 72c, 73c is surrounded by the supporting part 66b of terminal supporter 66. Therefore, in the downside that bus bar unit 60 is configured to bearing retainer 10, make external connection terminals 71c, 72c, 73c through slotting In the case where entering in the through hole 16a of bearing retainer 10, external connection terminals 71c, 72c, 73c and through hole can be made Supporting part 66b is accompanied between the inner peripheral surface of 16a.As a result, it can be ensured that external connection terminals 71c, 72c, 73c and bearing are protected Hold the insulation of frame 10.

As shown in fig. 6, protrusion 66d is from terminal supporter main part 66a towards the plate-like extension in downside.Protrusion 66d insertion In the groove 63d of busbar retainer 61.Thereby, it is possible to improve holding of the busbar retainer 61 to terminal supporter 66 Reliability.In addition, as a result, can be improved the guarantor for being held in external connection terminals 71c, 72c, 73c of terminal supporter 66 The reliability held.

As described above, groove 63d is inserted into for busbar main part 71b, 72b, 73b of mutually busbar 71,72,73.It is convex Portion 66d is embedded in groove 63d on the upside of busbar main part 71b, 72b, 73b.Busbar will be mutually used from upside as a result, 71, it 72,73 is pressed into groove 63d, mutually being stablized with the holding of busbar 71,72,73 in bus bar unit 60 can be made.

The busbar main part that busbar 73 is used from upside pressing V phase with busbar 72 with W phase in three protrusion 66d Externally connection terminal 72c, 73c extends to downside and is embedded in groove 63d two protrusion 66d of 72b, 73b respectively.Cause This, which can be near the root that upside presses external connection terminals 72c, 73c, and can be improved makes outside Connection terminal 72c, 73c stable effect.

Fig. 8 is the cross-sectional view along the VIII-VIII line of Fig. 7.

In fig. 8, the V phase being inserted in groove 63d is illustrated with the fixture construction of busbar 72.Here, it omits Illustrate, but identical fixed structure is also used with busbar 71 with W phase busbar 73 to the U phase being inserted in other grooves 63d It makes.

Opening in the upside of groove 63d be provided with towards upside and tapering 63e that groove width broadens.It is bored by setting Portion 63e is mutually become easy with busbar 72 and protrusion 66d to the insertion process of groove 63d.

The front end face 66f of protrusion 66d with mutually use busbar 72 towards face contact to the upper side.The front end of 66d in protrusion It is provided with the weld portion 66e engaged with the inner surface of groove 63d.Weld portion 66e is the front end melting solidification by protrusion 66d Come molding.Weld portion 66e is engaged with the wall surface of groove 63d and mutually with busbar 72 during cured.Thereby, it is possible to will Terminal supporter 66 is firmly fixed at busbar retainer 61.Mutually use busbar 72 from groove furthermore it is possible to effectively inhibit 63d is extracted.In addition, in the present embodiment, instantiating the case where the front end of protrusion 66d is provided with weld portion 66e.So And as long as at least part in protrusion 66d is provided with weld portion 66e.

Terminal supporter 66 is by including the resinous wood including integrally formed first resin portion 66A and the second resin portion 66B Material is constituted.That is, terminal supporter 66 is formed by dual-color forming.That is, terminal supporter 66 is by the first resin portion 66A Dual-color forming is carried out with the second resin portion 66B and is molded.

Second resin portion 66B is the resin material of the fusing point thermoplasticity lower than the first resin portion 66A.Terminal supporter master Body portion 66a and supporting part 66b is made of the first resin portion 66A.On the other hand, protrusion 66d is made of the second resin portion 66B.

According to the present embodiment, weld portion 66e is made of low-melting second resin portion 66B.Therefore, by by protrusion 66d heats terminal supporter 66 and can be easy molding weld portion 66e in the state of being inserted in groove 63d.In addition, In the present embodiment, the case where entire protrusion 66d is made of the second resin portion 66B is instantiated.As long as however, being embedded in protrusion A part of part in the groove 63d of 66d is made of the second resin portion 66B.

In the manufacturing method of bus bar unit 60, to the process that terminal supporter 66 is fixed on to busbar retainer 61 It is illustrated.Firstly, carrying out mutually being installed on the busbar installation procedure of busbar retainer 61 with busbar 71,72,73.? Mutually in busbar installation procedure, the groove 63d for being set to busbar retainer 61 will be mutually inserted into busbar 71,72,73 In.

Next, the terminal supporter installation procedure for terminal supporter 66 is installed on busbar retainer 61 is (outer Portion's connection terminal supporting member installation procedure).In terminal supporter installation procedure, firstly, by external connection terminals 71c, 72c, 73c is inserted in the retaining hole 66c of terminal supporter 66.Then, by the protrusion 66d of terminal supporter 66 from mutually using busbar 71,72,73 upside is embedded in groove 63d.Also, terminal supporter 66 is heated and melts a part of protrusion 66d And then solidify, mold the weld portion 66e engaged with the inner surface of groove 63d.

During forming weld portion 66e, can also make current flow through mutually makes protrusion 66d with busbar 71,72,73 A part melting.By making current flow through mutually with busbar 71,72,73, mutually sent out with busbar 71,72,73 because of Joule heat Heat.The heat is transmitted to protrusion 66d and melts a part of protrusion 66d.By make current flow through mutually with busbar 71,72, 73 come in the case where forming weld portion 66e, is capable of the front end of only local heating protrusion 66d.Therefore, it can not be supported to terminal Other positions of part 66 form weld portion 66e with affecting.In addition, forming weld portion 66e Shi Xiang by Joule heat Current value when driving motor 1 with the current value ratio flowed in busbar 71,72,73 is sufficiently big.

(neutral point busbar (the second busbar, busbar))

As described above, the stator 30 of present embodiment has the coil group 7,8 of two systems (referring to Fig. 4).Multiple neutrality Point busbar 81,82 is provided with the identical quantity with the quantity of coil group (i.e. system number).Therefore, the busbar of present embodiment There are two neutral point busbars 81,82 for the tool of unit 60.

Fig. 9 is the bottom view of bus bar unit 60.As shown in figure 9, neutral point busbar 81,82 has busbar main part 81b, 82b and three coils terminal 81a, 82a.Neutral point busbar 81,82 is plate.In neutral point busbar 81,82, At least busbar main part 81b, 82b are configured using axial direction as thickness direction.

Busbar main part 81b, 82b extend along with axially vertical plane.Busbar main part 81b, 82b respectively around In 240 ° of the region of central axis J circumferentially.At least part of busbar main part 81b, 82b are kept from busbar Frame 61 exposes.That is, neutral point busbar 81,82 will not be on resin insert-molding to busbar retainer 61.

Coil terminal 81a, 82a and lead-out wire 33a connection.Coil includes to carry out to lead-out wire 33a with terminal 81a, 82a The part of holding.The plan view shape of coil terminal 81a, 82a are the substantially U-shaped being open in radially inner side.Coil terminal 81a, 82a with axially vertical direction as thickness direction to be configured.

Three coils are with terminal 81a, 82a respectively between length direction of busbar main part 81b, 82b (i.e. circumferential) etc. It is configured every ground.Two coil terminals 81a, the 82a of three coils in terminal 81a, 82a be located at busbar main part 81b, The both ends of 82b, a remaining coil is with terminal 81a, 82a between above-mentioned two coil terminal 81a, 82a.

Coil is extended to the direction far from busbar main part 81b, 82b radially with terminal 81a, 82a.It is more specific and Speech, coil are extended with terminal 81a, 82a from busbar main part 81b, 82b to radial outside.

In addition, coil terminal 81a, 82a can also extend relative to busbar main part 81b, 82b to radially inner side. That is, as long as coil is extended relative to busbar main part 81b, 82b to radial side with terminal 81a, 82a.

The coil of neutral point busbar 81,82 is with terminal 81a, 82a and mutually with the coil terminal of busbar 71,72,73 71a, 72a, 73a extend relative to respective busbar main part 81b, 82b, 71b, 72b, 73b to the radial same direction.It is logical Cross and be configured so that, can make neutral point busbar 81,82 with mutually use busbar 71,72,73 coil terminal 81a, 82a, 71a, 72a, 73a are consistent relative to the radial direction outstanding of busbar retainer 61.Therefore, configuration can be unified from stator 30 The position in the radial direction lead-out wire 33a for extending and being connect with coil with terminal 81a, 82a, 71a, 72a, 73a.Converge as a result, Retainer 61 by neutral point busbar 81,82 and mutually with construction (this reality of busbar 71,72,73 and lead-out wire 33a insulation Apply the first wall portion 62c etc. in mode) it is not easy to complicate.In addition, configure in this way, when from end on observation, Duo Gexiang With the coil of busbar 71,72, the 73 coil terminal of terminal 71a, 72a, 73a and multiple neutral point busbars 81,82 81a, 82a VC in the single imaginary circle around central axis J are arranged.Therefore, in welding sequence, by making bus bar unit 60 It is rotated with stator 30 around central axis J, it is not necessary to which making welding fixture, movement can be to lead-out wire 33a and coil end radially Sub- 81a, 82a, 71a, 72a, 73a carry out welding to connect them.Thereby, it is possible to simplify welding sequence.

Coil is extended with terminal 81a, 82a from busbar main part 81b, 82b to downside.That is, coil terminal 81a, 82a In the axial direction to far from mutually with the direction extension of busbar 71,72,73.Thereby, it is possible to by coil with terminal 81a, 82a in axis It is upwardly away from and is mutually configured with the coil of busbar 71,72,73 with the mode of terminal 71a, 72a, 73a, so as to inhibit Mutual interference.In addition, in neutral point busbar 81,82 and mutually with the coil end of the either side in busbar 71,72,73 Son deteriorates the workability of welding with the coil terminal in the welding sequence of lead-out wire 33a, being able to suppress another party.

Multiple neutral point busbars 81,82 are classified into the first system neutral point busbar 81 and second system neutrality point sink Flow item 82.The first system neutral point busbar 81 and the coil group (coil group 7 of the first system) of a system each phase (U phase, V phase, W phase) coil 33 lead-out wire 33a connection.Similarly, the coil of second system neutral point busbar 82 and a system The lead-out wire 33a connection of the coil 33 of each phase (U phase, V phase, W phase) of group (coil group 8 of second system).In addition, mutually with confluence The coil of item 71,72,73 with the coil of terminal 71a, 72a, 73a and neutral point busbar 81,82 terminal 81a, 82a circumferentially It is alternately arranged.

As shown in fig. 6, multiple neutral point busbars 81,82 are fixed on the downside of busbar retainer 61.Multiple neutral points At least part of busbar 81,82 overlaps each other when from end on observation.

Multiple neutral point busbars 81,82 be at least busbar main part 81b, 82b using it is axial as thickness direction come into The plate of row configuration.That is, the neutral point busbar 81,82 of present embodiment is so-called horizontal type.Therefore, even if will be more In the case that a neutral point busbar 81,82 overlaps in the axial direction, axial size is also not easy to become larger.

According to the present embodiment, mutually with the neutral point busbar in busbar 71,72,73 and neutral point busbar 81,82 81,82 be horizontal type.It on the other hand, with busbar 71,72,73 is mutually busbar main part 71b, 72b, 73b with axial work It is thickness direction the so-called longitudinal type that is configured.In general, busbar 71,72,73 and U phase, V phase, W phase are mutually used Coil 33 accordingly at least need three.Therefore, make mutually to weigh with 71,72,73 horizontal type of busbar and in the axial direction In the case where folded configuration, need and accordingly 3 layers of laminated configuration or more of the busbar of each phase.In addition, stacking busbar that Insulating layer is provided between this.Therefore, in the case where needing 3 layers of laminated configuration or more, axial size is three busbars Plate thickness and the insulating layer between them thickness it is total, the effect of the miniaturization of axial direction caused by overlapping becomes smaller. According to the present embodiment, it by making the neutral point busbars 81 of two systems, 82 horizontal types and being laminated, can be improved The effect that axial size inhibits.In addition, the insulating layer between being set to the above-mentioned busbar being overlapped in the axial direction exists It is air layer in present embodiment.

As shown in figure 9, multiple configurations of neutral point busbar 81,82 are in the first wall portion for being set to retainer main part 62 Between 62c and the second wall portion 62d, and circumferentially.First wall portion 62c and the second wall portion 62d are radially across neutrality The mode of busbar main part 81b, 82b of point busbar 81,82 are configured.

According to the present embodiment, the first wall portion 62c is when from end on observation positioned at the busbar of neutral point busbar 81,82 Between main part 81b, 82b and lead-out wire 33a.Thereby, it is possible to be easy to insulate neutral point busbar 81,82 and lead-out wire 33a.

According to the present embodiment, neutral point busbar 81,82 is clipped in the first wall portion 62c and the second wall portion from radially inner and outer Between 62d.Therefore, it can be easy radially to position neutral point busbar 81,82.

According to the present embodiment, by being provided with the first wall portion 62c and the second wall portion 62d on retainer main part 62, It can be improved the rigidity of retainer main part 62.

The first notch 62ca and the second notch 62cb are provided on the first wall portion 62c.In addition, in the second wall portion The second notch 62db is provided only on 62d.Neutral point busbar 81,82 is in the first notch 62ca or the second notch Radially expose in 62cb, 62db.

First notch 62ca passes through for coil terminal 81a, 82a of neutral point busbar 81,82.It can use and pass through First notch 62ca is set and prolongs coil terminal 81a, 82a directly from busbar main part 81b, 82b to radial outside The construction stretched.That is, do not need that the part for extending and crossing the first wall portion 62c to downside is arranged on coil terminal 81a, 82a, And neutral point busbar 81,82 can be manufactured inexpensively.

Wide width part 81s, 82s of second notch 62cb, 62db and the neutral point busbar 81,82 illustrated below exist Radially it is overlapped.By the way that second notch 62cb, 62db is arranged, it is able to suppress wide width part 81s, 82s and busbar retainer 61 It interferes.

In addition, in the present embodiment, the second a part of notch 62cb passes through for coil terminal 81a.That is, one Point the second notch 62cb also as coil terminal 81a by notch function.

At least part of second notch 62cb being set in multiple second notch 62cb of the first wall portion 62c exists Radially it is in staggered configuration with lead-out wire 33a.It is in staggered configuration, is easy with lead-out wire 33a radially by the second notch 62cb Ensure the insulation from the second notch 62cb busbar main part 81b, 82b exposed and lead-out wire 33a.Alternatively, it is also possible to be, The second all notch 62cb are in staggered configuration with lead-out wire 33a radially.

In the following description, 62 side of retainer main part that is located in multiple neutral point busbars 81,82 (is converged 61 side of retainer) a side as first layer busbar 81.In addition, by multiple neutral point busbars 81,82 relative to Retainer main part 62 (61 side of busbar retainer) is located at another party's conduct of the position than first layer busbar 81 in the outer part Second layer busbar 82.In addition, in the following description, first layer busbar 81 and second layer busbar 82 are referred to as neutrality Point busbar 81,82.First layer busbar 81 is the first system neutral point busbar connecting with the coil group 7 of the first system 81, the second layer busbar 82 connecting with the coil group 8 of second system is second system neutral point busbar 82.

Figure 10 is the schematic cross-sectional view along the X-X line of Fig. 9.On the busbar main part 81b of first layer busbar 81 Be provided with along axially through fixation hole (through hole) 81h and through hole (through hole) 81i.In the confluence of second layer busbar 82 Be provided on main part 82b along axially through fixation hole (through hole) 82h and keep out of the way hole (through hole) 82i.

In addition, in the present embodiment, fixation hole 81h, 82h, through hole 81i and the interior zone quilt for keeping out of the way hole 82i Busbar main part 81b, 82b is surrounded from four directions.As long as however, fixation hole 81h, 82h, through hole 81i and keeping out of the way the hole edge 82i Axially through then or kerf.As long as that is, fixation hole 81h, 82h, through hole 81i and keep out of the way hole 82i they Interior zone is surrounded by busbar main part 81b, 82b from tripartite, then interior zone can not also be entirely by busbar main part 81b, 82b are surrounded.

It is provided with multiple axle portion 67a, 68a, 69a on the lower surface 62b of retainer main part 62 and is located at each axle portion Multiple weld portion 67b, 68b, 69b of the front end of 67a, 68a, 69a.Weld portion 67b, 68b, 69b are the hemisphere to downside protrusion Shape.Weld portion 67b, 68b, 69b are the front ends by axle portion 67a, 68a, 69a because heat melts to molding.

As shown in figure 9, multiple axle portion 67a, 68a, 69a include three first shaft portion 67a, two the second shaft portion 68a and One third axle portion 69a.In addition, multiple weld portion 67b, 68b, 69b include the first welding positioned at the front end of first shaft portion 67a Portion 67b, the third welding positioned at the second weld portion 68b of the front end of the second shaft portion 68a and positioned at the front end of third axle portion 69a Portion 69b.

First shaft portion 67a and the first weld portion 67b is arranged to fix first layer busbar 81.The second shaft portion 68a, third axle portion 69a, the second weld portion 68b and third weld portion 69b are arranged to fix second layer busbar 82 's.Therefore, first layer busbar 81 and second layer busbar 82 are fixed by three weld portions respectively.

First weld portion 67b, the second weld portion 68b and third weld portion 69b are in the single imaginary circle around central axis J Upper arrangement.Therefore, molding thermo-compression bonding is being carried out to the first weld portion 67b, the second weld portion 68b and third weld portion 69b In process, by rotating bus bar unit 60 around central axis J, without moving hot pressing welding fixture radially. Thereby, it is possible to simplify hot pressing process.In addition, being omitted in Fig. 9 and being arranged with the first weld portion 67b, the second weld portion 68b And the diagram of the imaginary circle of third weld portion 69b.The imaginary circle is the circle of the X-X line comprising arc-shaped shown in Fig. 9.

As shown in Figure 10, first shaft portion 67a passes through the fixation hole 81h of first layer busbar 81.First weld portion 67b is located at The downside of first layer busbar 81.First weld portion 67b extends to the fixation hole of first layer busbar 81 when from end on observation The outside of 81h.First weld portion 67b has in the part extended outward relative to first shaft portion 67a towards to the upper side first Stationary plane 67d.First stationary plane 67d is contacted with the lower surface 81p of first layer busbar 81.In addition, first layer busbar 81 Upper surface 81q is contacted with the lower surface 62b of retainer main part 62.That is, first layer busbar 81 is sandwiched in retainer main part 62 and first between weld portion 67b.The fixed first layer busbar 81 of first weld portion 67b as a result,.

The hole 82i that keeps out of the way of second layer busbar 82 is located at first layer busbar 81 and second layer busbar 82 from axial sight In the region being overlapped when examining and it is located at the downside for fixing the first weld portion 67b of first layer busbar 81.That is, keeping out of the way hole 82i It is Chong Die with the first weld portion 67b when from end on observation.As shown in figure 9, the first weld portion 67b is located at when from end on observation Than keeping out of the way the position of the inner peripheral surface of hole 82i in the inner part.That is, the first weld portion 67b is configured when from end on observation is keeping out of the way hole 82i Hole in.

According to the present embodiment, keep out of the way hole 82i by being arranged on second layer busbar 82, when in first layer busbar 81 In the case where fixing first layer busbar 81 in the region Chong Die with second layer busbar 82, even if by 81 He of first layer busbar Second layer busbar 82 closely configures in the axial direction, is also able to suppress the dry of the first weld portion 67b and second layer busbar 82 It relates to.

That is, according to the present embodiment, can consolidate in the region Chong Die with second layer busbar 82 of first layer busbar 81 Determine first layer busbar 81.Therefore, remittance of the weld portion 67b in first layer busbar 81 of first layer busbar 81 will can be fixed It flows and is balancedly configured on the length direction of a main part 81b.Further, since first layer busbar 81 and the second layer can be converged Item 82 closely configures, therefore bus bar unit 60 can be made to minimize in the axial direction.

As shown in Figure 10, be provided on the second shaft portion 68a towards the side opposite with retainer main part 62 (that is, with The opposite side of busbar retainer 61, downside) step surface 68c.The second shaft portion 68a than step surface 68c by base end side (on Side) position diameter be greater than than step surface 68c by front end side (downside) position diameter.

The second shaft portion 68a passes through the through hole 81i of first layer busbar 81 and the fixation hole 82h of second layer busbar 82. The lower surface 81p of first layer busbar 81 is located at the position more upper than step surface 68c.Therefore, first layer busbar 81 is logical Via hole 81i than step surface 68c by the position of base end side through being inserted in the second shaft portion 68a.

On the other hand, second layer busbar 82 is located at the position than step surface 68c on the lower.Second layer busbar 82 it is upper Surface 82q is contacted with step surface 68c.Therefore, the fixation hole 82h of second layer busbar 82 is leaning on front end side than step surface 68c Position, which is run through, is inserted in the second shaft portion 68a.

Second weld portion 68b is located at the downside of second layer busbar 82.Second weld portion 68b extends when from end on observation To the outside of the fixation hole 82h of second layer busbar 82.Second weld portion 68b extends outward relative to the second shaft portion 68a Part have towards the second stationary plane 68d to the upper side.The lower surface 82p of second stationary plane 68d and second layer busbar 82 connect Touching.Since the upper surface 82q of second layer busbar 82 is contacted with step surface 68c, second layer busbar 82 is sandwiched in step Between face 68c and the second weld portion 68b.The fixed second layer busbar 82 of second weld portion 68b as a result,.

According to the present embodiment, can be fixed in the region Chong Die with second layer busbar 82 of first layer busbar 81 Two layers of busbar 82.In addition, since the second shaft portion 68a is by the through hole 81i of first layer busbar 81, can with axis First layer busbar 81 is positioned into vertical face.Alternatively, it is also possible to be, at least part of the outer peripheral surface of the second shaft portion 68a Inner circumferential face contact in the region for leaning on base end side (upside) than step surface 68c with through hole 81i.In this case, Neng Gouti The precision that height positions first layer busbar 81 by the second shaft portion 68a.

As shown in Figure 10, downward side stage portion 62e outstanding is provided on the lower surface 62b of retainer main part 62. There is the step lower surface 62f towards downside on stage portion 62e.Third axle portion 69a is from step lower surface 62f to downside It is prominent.Step lower surface 62f configuration is provided only with second layer busbar 82 on the lower surface 62b of retainer main part 62 Region in.The upper surface 82q of second layer busbar 82 is contacted with step lower surface 62f.

Third axle portion 69a is converged in first layer busbar 81 and the nonoverlapping region of second layer busbar 82 by the second layer Flow the fixation hole 82h of item 82.Third weld portion 69b is located at the downside of second layer busbar 82.Third weld portion 69b is from axial direction The outside of the fixation hole 82h of second layer busbar 82 is extended to when observation.Third weld portion 69b is relative to third axle portion 69a The part extended outward has towards third stationary plane 69d to the upper side.Under third stationary plane 69d and second layer busbar 82 Surface 82p contact.That is, second layer busbar 82 be sandwiched in retainer main part 62 stage portion 62e and third weld portion 69b it Between.The fixed second layer busbar 82 of third weld portion 69b as a result,.

Can also as in Figure 10 be used as imaginary line (double dot dash line) and illustrated by, in first layer busbar 81 and second Insulating trip (insulating element) 4 has been sandwiched between layer busbar 82.That is, bus bar unit 60, which also can have, is clipped in multiple neutral points Insulating trip 4 between busbar 81,82.It is provided on insulating trip 4 for avoiding the first weld portion 67b and the second shaft portion 68a Interference hole portion 4h.By the way that insulating trip 4 is arranged between first layer busbar 81 and second layer busbar 82, the can be improved The reliability of the insulation of one layer of busbar 81 and second layer busbar 82.

In Fig. 9, mutually use busbar 71,72,73 (empty as hidden line the upside for being configured at busbar retainer 61 Line) it shows.As shown in figure 9, neutral point busbar 81,82 with mutually use busbar 71,72,73 at least one when from end on observation Part overlaps each other.Thereby, it is possible to minimize bus bar unit 60 radially.In addition, mutually using busbar 71,72,73 The retainer main part 62 of busbar retainer 61 is accompanied between the axial direction of neutral point busbar 81,82.Even if making as a result, In the case that mutually busbar 71,72,73 and neutral point busbar 81,82 overlap each other when from end on observation, also it is easy true Protect the insulation for mutually using busbar 71,72,73 and neutral point busbar 81,82.

Weld portion 67b, 68b, 69b are when from end on observation relative to being mutually in staggered configuration with busbar 71,72,73.As above Described, weld portion 67b, 68b, 69b are molding and making resin melting in the front end of axle portion 67a, 68a, 69a.Therefore, it is Molding weld portion 67b, 68b, 69b, and busbar retainer 61 is heated.When the slave end on observation of retainer main part 62 with The part of weld portion 67b, 68b, 69b overlapping is possible to the heat when molding of weld portion 67b, 68b, 69b due to is slightly distorted.? When from end on observation, by making weld portion 67b, 68b, 69b relative to being mutually in staggered configuration with busbar 71,72,73, it is able to suppress Deformation when melting weld portion 67b, 68b, 69b is mutually affected with the position precision of busbar 71,72,73.As a result, can It is enough to improve the position precision for mutually using busbar 71,72,73.

In the present embodiment, multiple phases in busbar 71,72,73 along busbar main part 71b, 72b, 73b The circumferential maximum U phase of length uses busbar 71 by leaning on the position of radially inner side than weld portion 67b, 68b.U phase busbar 71 by the way that than weld portion 67b, 68b, by the position and circumferentially of radially inner side, thereby, it is possible to shorten U phase busbar 71. As a result, can reduce the weight of motor 1 and save the fee of material of U phase busbar 71.

In the present embodiment, multiple phase busbars 71,72,73 are plate, and busbar main part 71b, 72b, 73b are Using the longitudinal type configured with axially vertical direction as thickness direction.By making mutually with busbar 71,72,73 Longitudinal type, even if with from end on observation phase busbar 71,72,73 and the nonoverlapping side of weld portion 67b, 68b, 69b In the case that formula is configured, the size in the radial direction of bus bar unit 60 is also not easy to become larger.

In the present embodiment, a weld portion 67b in six weld portions 67b, 68b, 69b is located at first layer busbar The root of 81 coil terminal 81a.That is, a weld portion 67b is be overlapped radially with terminal 81a with coil.In this way Configuration, it can be ensured that the coil position precision of terminal 81a and the vibration of easy suppression coil terminal 81a.In addition, at this In embodiment, the case where being located at the coil root of terminal 81a to only one weld portion 67b, is illustrated.However, can also To be, all weld portion 67b, 68b, 69b are located at the root of coil terminal 81a.

The busbar main part 81b of first layer busbar 81 has the wide width part 81s being set to around through hole 81i. Similarly, the busbar main part 82b of second layer busbar 82, which has, is set to the wide width part 82s kept out of the way around the 82i of hole.It is wide Width portion 81s, 82s in center and through hole 81i or keep out of the way hole 82i center it is consistent round to stretching out on the outside of width direction.

According to the present embodiment, by the way that wide width part 81s, 82s is arranged, even if being arranged on neutral point busbar 81,82 logical Via hole 81i keeps out of the way hole 82i, and the sectional area of busbar main part 81b, 82b will not become smaller.It is able to suppress neutral point busbar 81,82 resistance becomes larger.

In addition, in the present embodiment, there is coil group (7 He of coil group of the first system of two systems to stator 30 The coil group 8 of second system), bus bar unit 60 has and each corresponding six phases busbar 71,72,73 of two systems The motor 1 of two neutral point busbars 81,82 corresponding with two systems is illustrated.However, not for system number It limits.Such as it is also possible to stator 30 only with the coil group of a system, bus bar unit 60 has mutually using for system Busbar and neutral point busbar.Alternatively, it is also possible to be, stator 30 only has that there are three coil group more than system, busbar lists Member 60 mutually uses busbar and neutral point busbar with three corresponding with coil group or more system numbers.

Next, being illustrated to the embodiment of the device for the motor 1 for carrying present embodiment.Figure 11 is to carry this reality Apply the schematic diagram of the electric power steering apparatus of the motor 1 of mode.Electric power steering apparatus 2 is equipped on turning for the wheel of automobile To mechanism.Electric power steering apparatus 2 is the device for mitigating steering force by hydraulic.Electric power steering apparatus 2 has horse Up to 1, steering shaft 214, oil pump 216 and control valve 217.

The input of steering shaft low damage device in 214 future 211 is transmitted to the axle 213 with wheel 212.Oil pump 216 makes It is generated to power cylinder 215 of the transmitting of axle 213 based on hydraulic driving force hydraulic.Control valve 217 controls the oil of oil pump 216 System.In electric power steering apparatus 2, motor 1 as oil pump 216 driving source and carry.In addition, the motor of present embodiment 1 is not limited to electric power steering apparatus, can also be equipped on any device.

More than, embodiments of the present invention and variation are illustrated, but each knot in embodiment and variation Structure and their combination etc. are an examples, can carry out additional, the province of structure without departing from the spirit and scope of the invention Slightly, displacement and other changes.In addition, the present invention will not be limited by embodiment.

Claims (8)

1. a kind of bus bar unit, is set to motor, which is characterized in that

The bus bar unit includes

Busbar retainer is set to the upside of stator, and the stator is annular in shape around central axis extended in the vertical direction Configuration；

Busbar is mutually used, the axial side of the busbar retainer is fixed on；And

Neutral point busbar is fixed on the axial other side of the busbar retainer,

Phase busbar and the neutral point busbar are respectively provided with:

Busbar main part, circumferentially；And

Multiple coil terminals, they extend to radial side relative to the busbar main part and draw with from the stator Lead-out wire connection,

Direction that the coil terminal described in the neutral point busbar extends relative to the busbar main part and in institute It is phase Tongfang radially relative to the direction that the busbar main part extends that the mutually coil described in busbar, which is stated, with terminal To,

The neutral point busbar is plate, and at least described busbar main part of the neutral point busbar is using axial as thickness Degree direction is configured,

The busbar retainer, which has, to be axially protruded and the first wall portion circumferentially,

First wall portion is drawn positioned at the busbar main part of the neutral point busbar with described when from end on observation Between outlet.

2. bus bar unit according to claim 1, which is characterized in that

The first notch passed through for the coil terminal of the neutral point busbar is provided in first wall portion.

3. bus bar unit according to claim 1 or 2, which is characterized in that

Be provided on the busbar main part of the neutral point busbar along axially through through hole,

The busbar main part of the neutral point busbar has the wide width part being arranged in around the through hole,

In first wall portion, be overlapped part is provided with the second notch radially with the wide width part.

4. bus bar unit according to claim 3, which is characterized in that

Second notch is in staggered configuration with the lead-out wire radially.

5. bus bar unit according to claim 1 or 2, which is characterized in that

The busbar retainer, which has, to be axially protruded and the second wall portion circumferentially,

First wall portion and second wall portion are radially across the busbar main body of the neutral point busbar The mode in portion configures.

6. bus bar unit according to claim 1 or 2, which is characterized in that

The phase is plate with busbar, at least described busbar main part of the phase busbar with axially vertical side To being configured as thickness direction.

7. bus bar unit according to claim 1 or 2, which is characterized in that

The phase is fixed on the upside of the busbar retainer with busbar,

The neutral point busbar is fixed on the downside of the busbar retainer.

8. a kind of motor, with bus bar unit described in any one in claim 1 to 7, wherein

The motor includes

The stator；And

Rotor, it is opposed radially across gap with the stator.