WO2019131423A1

WO2019131423A1 - Motor unit

Info

Publication number: WO2019131423A1
Application number: PCT/JP2018/046956
Authority: WO
Inventors: 慶介福永; 修平中松; 崇宣小山
Original assignee: 日本電産株式会社
Priority date: 2017-12-28
Filing date: 2018-12-20
Publication date: 2019-07-04
Also published as: CN111527674A; CN111527674B

Abstract

An embodiment of this motor unit comprises: a motor; an inverter for supplying electric power to the motor; a bus bar having a first extension part extending in a first direction, the bus bar connecting the motor and the inverter; a housing having a first opening hole through which the first extension part is passed, the motor being housed in the housing; an inverter case having a second opening hole, which faces the first opening hole in the first direction and through which the first extension part is passed, the inverter being housed in the inverter case; a bus bar support member supporting the bus bar, the bus bar support member being inserted across the first opening hole and the second opening hole; and a first seal member disposed between the inner peripheral surface of the first opening hole and the outer peripheral surface of the bus bar support member facing the inner peripheral surface, the first seal member being in contact with the inner peripheral surface of the first opening hole and the outer peripheral surface of the bus bar support member.

Description

Motor unit

The present invention relates to a motor unit.

Japanese Patent Publication No. 4546689 describes a device for connecting a pole housing of an electric motor and a housing of a control electronics.

Japanese Patent Publication: Patent No. 4546689

In the case where the housing for housing the motor and the inverter case for housing the inverter are fixed to each other, it is possible to provide an opening hole in the portion where the housing and the inverter case face each other and pass the bus bar to each opening hole . In this configuration, it is difficult to simplify the structure while securing the insulation between the housing and the bus bar, the insulation between the inverter case and the bus bar, and the sealability of the opening.

In view of the above problems, an object of the present invention is to provide a motor unit whose structure can be simplified.

One aspect of the motor unit of the present invention includes a motor, an inverter for supplying electric power to the motor, and a bus bar connecting the motor and the inverter, the bus having a first extending portion extending in a first direction. A housing having a first opening through which a first extension portion passes, and a housing in which the motor is accommodated, and a second opening through which the first extension portion passes and which faces the first opening hole in the first direction. An inverter case having a hole for accommodating the inverter, a bus bar supporting member for supporting the bus bar, and inserted across the first opening hole and the second opening hole; and the inside of the first opening hole A first seal portion disposed between the circumferential surface and the outer circumferential surface of the bus bar supporting member facing the inner circumferential surface, and in contact with the inner circumferential surface of the first opening and the outer circumferential surface of the bus bar supporting member; Equipped with

According to one aspect of the present invention, a motor unit is provided that can be simplified in structure.

FIG. 1 is a conceptual view of a motor unit according to one embodiment. FIG. 2 is a schematic side view of a motor unit according to one embodiment. FIG. 3 is a partial cross-sectional view of a motor unit according to one embodiment. FIG. 4 is a partial enlarged view of FIG. FIG. 5 is a perspective view showing the vicinity of the bus bar support member. FIG. 6 is a perspective view showing the vicinity of the bus bar support member. FIG. 7 is a perspective view showing the bus bar support member, the first seal portion, and the second seal portion. FIG. 8 is a partial cross-sectional view showing a modification of the motor unit according to one embodiment.

Hereinafter, a motor unit according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention.

In the following description, the direction of gravity is defined and described based on the positional relationship when the motor unit 1 is mounted on a vehicle located on a horizontal road surface. In the drawings, an XYZ coordinate system is shown as a three-dimensional orthogonal coordinate system as appropriate. In the XYZ coordinate system, the Z-axis direction indicates the vertical direction (that is, the vertical direction), the + Z direction is the upper side (opposite the gravity direction), and the -Z direction is the lower side (gravity direction). The X-axis direction is a direction orthogonal to the Z-axis direction, and indicates the front-rear direction of the vehicle on which the motor unit 1 is mounted. The + X direction is the vehicle front, and the −X direction is the vehicle rear. However, the + X direction may be the rear of the vehicle and the −X direction may be the front of the vehicle. The Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction, and indicates the width direction (left-right direction) of the vehicle, the + Y direction is the vehicle left, and the -Y direction is the vehicle right It is. However, when the + X direction is the rear of the vehicle, the + Y direction may be the right of the vehicle and the −Y direction may be the left of the vehicle. That is, regardless of the direction of the X axis, the + Y direction is simply one side in the vehicle left-right direction, and the −Y direction is the other side in the vehicle left-right direction.

Unless otherwise noted in the following description, the direction (Y-axis direction) parallel to the motor axis J2 of the motor 2 is simply referred to as “axial direction”, and the radial direction centered on the motor axis J2 is simply referred to as “radial direction”. The circumferential direction around the motor axis J2, that is, around the axis of the motor axis J2, is simply referred to as "circumferential direction". However, the above-mentioned "parallel direction" also includes a substantially parallel direction.

Hereinafter, a motor unit (electric drive device) 1 according to an exemplary embodiment of the present invention will be described based on the drawings.
FIG. 1 is a conceptual view of a motor unit 1 according to an embodiment. FIG. 2 is a schematic side view of the motor unit 1 as viewed from the side of the vehicle. In addition, FIG. 1 is a conceptual diagram to the last, and arrangement | positioning and the dimension of each part are not necessarily the same as actual.

The motor unit 1 is mounted on a vehicle having a motor as a power source such as a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), an electric vehicle (EV), and used as the power source.

As shown in FIGS. 1 to 3, the motor unit 1 of the present embodiment includes a motor (main motor) 2, a gear portion 3, a housing 6, an inverter 7, an inverter case 8, a bus bar 9, and a bus bar A support member 10, a first seal portion 11, and a second seal portion 12 are provided. A motor axis J2 of the motor 2 extends in a direction orthogonal to a first direction described later (in the example of the present embodiment, the X-axis direction). The motor axis J2 extends in the Y axis direction.

As shown in FIG. 1, the motor 2 includes a rotor 20 rotating around a motor axis J 2 extending in the horizontal direction, and a stator 30 located radially outward of the rotor 20. An interior of the housing 6 is provided with an accommodation space 80 for accommodating the motor 2 and the gear portion 3. The housing space 80 is divided into a motor chamber 81 for housing the motor 2 and a gear chamber 82 for housing the gear portion 3.

<Motor>
The motor 2 is accommodated in a motor chamber 81 of the housing 6. The motor 2 includes a rotor 20 and a stator 30 located radially outward of the rotor 20. The motor 2 is an inner rotor type motor including a stator 30 and a rotor 20 rotatably disposed inside the stator 30.

The rotor 20 rotates by supplying power to the stator 30 from the battery (not shown) through the inverter 7. As shown in FIGS. 1 to 3, the rotor 20 has a shaft (motor shaft) 21, a rotor core 24, and a rotor magnet 25. The rotor 20 (i.e., the shaft 21, the rotor core 24, and the rotor magnet 25) rotates about a motor axis J2 extending in the horizontal direction. The torque of the rotor 20 is transmitted to the gear portion 3.

The shaft 21 extends around a motor axis J2 extending in the horizontal direction and the width direction of the vehicle. The shaft 21 rotates about the motor axis J2. The shaft 21 is a hollow shaft provided with a hollow portion having an inner circumferential surface extending along the motor axis J2.

The shaft 21 extends across the motor chamber 81 and the gear chamber 82 of the housing 6. One end of the shaft 21 protrudes toward the gear chamber 82. A first gear 41 is fixed to an end of the shaft 21 projecting into the gear chamber 82.

The rotor core 24 is configured by laminating silicon steel plates. The rotor core 24 is a cylindrical body extending along the axial direction. A plurality of rotor magnets 25 are fixed to the rotor core 24. The plurality of rotor magnets 25 are arranged in the circumferential direction with the magnetic poles alternately.

The stator 30 surrounds the rotor 20 from the radially outer side. In FIG. 1, the stator 30 has a stator core 32, a coil 31, and an insulator (not shown) interposed between the stator core 32 and the coil 31. The stator 30 is held by the housing 6. In FIG. 3, the stator core 32 has a plurality of magnetic pole teeth radially inward from the inner circumferential surface of the annular yoke. A coil wire (not shown) is wound around the pole teeth. The coil wire wound around the pole teeth constitutes a coil 31. The coil wire is connected to the inverter 7 via the bus bar 9. As shown in FIG. 1, the coil 31 has a coil end 31 a that protrudes from the axial end surface of the stator core 32. The coil end 31 a protrudes in the axial direction more than the end of the rotor core 24 of the rotor 20. The coil end 31 a protrudes on both sides in the axial direction with respect to the rotor core 24.

<Gear part>
The gear portion 3 is accommodated in a gear chamber 82 of the housing 6. The gear portion 3 is connected to the shaft 21 on one side in the axial direction of the motor shaft J2. The gear portion 3 has a reduction gear 4 and a differential device 5. The torque output from the motor 2 is transmitted to the differential 5 via the reduction gear 4.

<Reduction gear>
The reduction gear 4 is connected to the rotor 20 of the motor 2. The reduction gear 4 has a function of reducing the rotational speed of the motor 2 and increasing the torque output from the motor 2 according to the reduction ratio. The reduction gear 4 transmits the torque output from the motor 2 to the differential 5.

The reduction gear 4 has a first gear (intermediate drive gear) 41, a second gear (intermediate gear) 42, a third gear (filed drive gear) 43, and an intermediate shaft 45. The torque output from the motor 2 is transmitted to the ring gear (gear) 51 of the differential 5 through the shaft 21 of the motor 2, the first gear 41, the second gear 42, the intermediate shaft 45 and the third gear 43. It is transmitted. The gear ratio of each gear, the number of gears, etc. can be variously changed according to the required reduction ratio. The reduction gear 4 is a reduction gear of a parallel axis gear type in which axes of the respective gears are arranged in parallel.

The first gear 41 is provided on the outer peripheral surface of the shaft 21 of the motor 2. The first gear 41 rotates with the shaft 21 about the motor axis J2. The intermediate shaft 45 extends along an intermediate axis J4 parallel to the motor axis J2. The middle shaft 45 rotates around the middle axis J4. The second gear 42 and the third gear 43 are provided on the outer peripheral surface of the intermediate shaft 45. The second gear 42 and the third gear 43 are connected via an intermediate shaft 45. The second gear 42 and the third gear 43 rotate around the intermediate shaft J4. The second gear 42 meshes with the first gear 41. The third gear 43 meshes with the ring gear 51 of the differential device 5. The third gear 43 is located on the side of the partition wall 61 c with respect to the second gear 42.

<Differential device>
The differential device 5 is connected to the motor 2 via the reduction gear 4. The differential 5 is a device for transmitting the torque output from the motor 2 to the wheels of the vehicle. The differential device 5 has a function of transmitting the same torque to the axles 55 of the left and right wheels while absorbing the speed difference between the left and right wheels when the vehicle is turning. The differential 5 has a ring gear 51, a gear housing (not shown), a pair of pinion gears (not shown), a pinion shaft (not shown), and a pair of side gears (not shown).

The ring gear 51 rotates about a differential axis J5 parallel to the motor axis J2. The torque output from the motor 2 is transmitted to the ring gear 51 via the reduction gear 4. That is, the ring gear 51 is connected to the motor 2 through another gear.

(Arrangement of each axis)
The motor axis J2, the intermediate axis J4 and the differential axis J5 extend parallel to one another along the horizontal direction. The intermediate shaft J4 and the differential shaft J5 are located below the motor shaft J2. Therefore, the reduction gear 4 and the differential 5 are located below the motor 2.

As shown in FIG. 2, when viewed from the axial direction of the motor axis J2, a line segment virtually connecting the motor axis J2 and the intermediate axis J4 is defined as a first line segment L1, and the intermediate axis J4 and the differential axis J5 are A line segment virtually connected is a second line segment L2, and a line segment virtually connecting the motor axis J2 and the differential axis J5 is a third line segment L3.

The second line segment L2 extends along the substantially horizontal direction. That is, the intermediate shaft J4 and the differential shaft J5 are aligned substantially in the horizontal direction. In the present embodiment, the substantially horizontal direction of the second line segment L2 is a direction within ± 10 ° with respect to the horizontal direction.
An angle α between the second line segment L2 and the third line segment L3 is 30 ° ± 5 °.
The first line segment L1 extends substantially in the vertical direction. That is, the motor shaft J2 and the intermediate shaft J4 are aligned along the substantially vertical direction. In the present embodiment, the substantially vertical direction of the first line segment L1 is a direction within ± 10 ° with respect to the vertical direction.

The length L1 of the first line segment, the length L2 of the second line segment, and the length L3 of the third line segment satisfy the following relationship.
L1: L2: L3 = 1: 1.4 to 1.7: 1.8 to 2.0
Further, the reduction ratio in the reduction mechanism from the motor 2 to the differential 5 is 8 or more and 11 or less. According to this embodiment, a desired gear ratio (8 or more and 11 or less) can be realized while maintaining the positional relationship between the motor shaft J2, the intermediate shaft J4, and the differential shaft J5 as described above.

<Housing>
The housing 6 is made of metal. Although illustration is abbreviate | omitted, the housing 6 is comprised combining a some member. The housing 6 may be configured of a single member. As shown in FIG. 1, the motor 2 and the gear portion 3 are housed in a housing space 80 provided inside the housing 6. The housing 6 holds the motor 2 and the gear portion 3 in the housing space 80. The housing 6 has a partition wall 61c. The housing space 80 of the housing 6 is divided into a motor chamber 81 and a gear chamber 82 by a partition wall 61 c. The motor 2 is accommodated in the motor chamber 81. The gear chamber 3 accommodates the gear portion 3 (i.e., the reduction gear 4 and the differential 5).

An oil reservoir P in which oil O is accumulated is provided in a lower region in the accommodation space 80. In the present embodiment, the bottom 81 a of the motor chamber 81 is located above the bottom 82 a of the gear chamber 82. Further, a partition wall opening 68 is provided in the partition wall 61 c that divides the motor chamber 81 and the gear chamber 82. The partition opening 68 brings the motor chamber 81 and the gear chamber 82 into communication with each other. The partition opening 68 moves the oil O accumulated in the lower region in the motor chamber 81 to the gear chamber 82. In addition to the partition opening 68 described above, the partition 61 c is provided with an insertion hole 61 f through which the shaft 21 of the motor 2 is inserted.

A part of the differential device 5 is immersed in the oil reservoir P. The oil O accumulated in the oil reservoir P is scooped up by the operation of the differential device 5 and a part is diffused into the gear chamber 82. The oil O diffused to the gear chamber 82 is supplied to the gears of the reduction gear 4 and the differential gear 5 in the gear chamber 82 and spreads the oil O on the tooth surfaces of the gears. The oil O used in the reduction gear 4 and the differential device 5 drips and is collected in an oil reservoir P located below the gear chamber 82. The capacity of the oil reservoir P of the housing space 80 is such that part of the bearing of the differential gear 5 is immersed in the oil O when the motor unit 1 is stopped.

The oil O circulates in an oil passage (not shown) provided in the housing 6. The oil path is a path of oil O which supplies the oil O from the oil reservoir P to the motor 2. The oil passage circulates the oil O to cool the motor 2.

The oil O is used to lubricate the reduction gear 4 and the differential gear 5. The oil O is also used for cooling the motor 2. The oil O accumulates in the lower region (i.e., oil reservoir P) in the gear chamber 82. It is preferable to use an oil O equivalent to a low viscosity lubricating oil for automatic transmission (ATF: Automatic Transmission Fluid) in order to perform the functions of a lubricating oil and a cooling oil.

In FIGS. 1 and 2, the housing 6 has a motor storage portion 6 a for storing the motor 2 and a gear storage portion 6 b for storing the gear portion 3. That is, the motor 2 is accommodated in the housing 6. The motor housing portion 6a has a cylindrical shape centered on the motor shaft J2.

As shown in FIGS. 3 and 4, in the motor housing 6a, a wall 6e facing the inverter case 8 has a plate shape extending perpendicularly to the X axis. The motor housing portion 6a has a first opening 6c. The first opening 6c is disposed in the wall 6e and opens in the X-axis direction. That is, the housing 6 has the first opening 6c. The first opening 6 c penetrates the motor housing 6 a in the radial direction. The first opening 6c penetrates the motor housing 6a in the X-axis direction.

In the example of the present embodiment, as viewed in the X-axis direction, the first opening 6 c has an oval shape. The first opening 6c has an oval shape extending in the Y-axis direction. That is, when viewed in the X-axis direction, the first aperture 6 c has an aperture dimension in the Y-axis direction larger than an aperture dimension (inner dimension) in the Z-axis direction.

As shown in FIG. 2, the gear housing portion 6 b has a protruding portion 6 d that protrudes in the radial direction with respect to the motor housing portion 6 a when viewed from the axial direction. In the present embodiment, the overhanging portion 6d projects to the rear side and the lower side of the motor housing portion 6a. The overhanging portion 6 d accommodates a part of the gear portion 3. More specifically, a portion of the second gear 42, a portion of the third gear 43, and a portion of the ring gear 51 are accommodated inside the overhang portion 6d. The overhang portion 6 d is provided with an axle passage hole 61 e. The axle passage hole 61e penetrates the overhang portion 6d in the Y-axis direction. As shown in FIG. 1, the axle shaft passage holes 61e are respectively provided in a pair of wall portions located at both ends in the Y-axis direction of the overhang portion 6d. The axle 55 is inserted into the axle passage hole 61e.

<Inverter>
Inverter 7 is electrically connected to motor 2. The inverter 7 supplies power to the motor 2. The inverter 7 supplies power to the stator 30 via the bus bar 9. The inverter 7 controls the current supplied to the motor 2. The inverter 7 has a circuit board and a capacitor.

<Inverter case>
As shown in FIGS. 2 and 3, the inverter case 8 is a rectangular parallelepiped container. The inverter case 8 is made of metal. However, the inverter case 8 may be made of resin. The inverter case 8 accommodates the inverter 7. The inverter case 8 is disposed adjacent to the motor housing portion 6a in the radial direction of the motor shaft J2. The inverter case 8 and the motor housing portion 6a are horizontally adjacent to each other. The inverter case 8 has a bottomed cylindrical case body 8 d and a lid 8 e that closes the upper opening of the case body 8 d.

In FIG. 3, the inverter case 8 has a flange 8 a on the case main body 8 d. The flange portion 8a has a plate shape which protrudes in the X axis direction from the upper end portion of the peripheral wall of the case main body 8d and extends in the Y axis direction. The plate surface of the ridge portion 8 a faces in the Z-axis direction. The flange portion 8a is provided with a screw hole (not shown) which penetrates the flange portion 8a in the Z-axis direction. The screw member 6 f is inserted into the screw hole. The screw member 6f is screwed into a screw hole (not shown) of the motor housing 6a. The screw hole is provided on the top wall of the motor housing 6a and opens upward. The screw member 6 f is tightened with respect to the housing 6 in the Z-axis direction. The inverter case 8 is fixed to the housing 6 using a screw member 6 f. The inverter case 8 is fixed to the outer peripheral surface facing the radially outer side of the motor housing portion 6 a.

Among the peripheral walls of the case main body 8d, the wall 8b facing the motor housing 6a has a plate shape extending perpendicularly to the X axis. In the illustrated example, the plate thickness (thickness) of the lower portion of the wall 8 b is thicker than the plate thickness of the upper portion of the wall 8 b located above the lower portion.

The inverter case 8 has a second opening 8 c. The second opening 8c is disposed in the wall 8b of the case body 8d and opens in the X-axis direction. The second opening 8c is located in the lower portion of the wall 8b. The second opening 8 c penetrates the inverter case 8 in the radial direction. The second opening 8 c penetrates the inverter case 8 in the X-axis direction. The second opening 8 c faces the first opening 6 c in a first direction (in the present embodiment, the X-axis direction) described later.

In the example of the present embodiment, as viewed in the X-axis direction, the second opening 8 c has an oval shape. The second opening 8c has an oval shape extending in the Y-axis direction. That is, when viewed from the X-axis direction, the second opening hole 8c has a larger opening size in the Y-axis direction than an opening size (inner size) in the Z-axis direction. In the example of the present embodiment, in the cross section perpendicular to the X axis, the second opening 8 c and the first opening 6 c have portions having the same shape. When viewed in the X-axis direction, the shape of the second opening 8c and the shape of the first opening 6c match each other.

<Bus bar>
The bus bar 9 connects the motor 2 and the inverter 7. The bus bar 9 electrically connects the stator 30 and the inverter 7. As shown in FIGS. 5 and 6, a plurality of bus bars 9 are provided. In the present embodiment, three bus bars 9 are provided. The currents flowing through the three bus bars 9 are out of phase with each other. Each current flowing through the three bus bars 9 is a U phase, a V phase or a W phase. The plate surface of the bus bar 9 faces in the Z-axis direction. The plurality of bus bars 9 are arranged in a direction orthogonal to a first direction (X-axis direction) described later. The plurality of bus bars 9 are arranged at intervals in the Y-axis direction.

In FIGS. 3 and 4, the bus bar 9 has a first extending portion 9 a, a second extending portion 9 b, and a third extending portion (not shown). The first extending portion 9a extends in the first direction. In the present embodiment, the first direction is the X-axis direction. In the first direction, the direction from the second opening 8 c to the first opening 6 c is one side in the first direction. One side in the first direction is the + X direction. Of the first direction, the direction from the first opening 6c to the second opening 8c is the other side in the first direction. The other side in the first direction is the −X direction.

The first extending portion 9a is passed through the first opening 6c. The first extending portion 9 a extends over the inside and the outside of the housing 6. The first extending portion 9a extends through the first opening 6c to the inside and the outside of the motor housing 6a. The end on one side in the first direction of the first extending portion 9a is disposed on one side in the first direction than the first opening 6c. The end on one side in the first direction of the first extending portion 9 a is located inside the housing 6.

The first extending portion 9a is passed through the second opening 8c. The first extending portion 9 a extends between the inside and the outside of the inverter case 8. The end on the other side in the first direction of the first extending portion 9 a is disposed on the other side in the first direction than the second opening hole 8 c. The end on the other side of the first extension portion 9 a in the first direction is located inside the inverter case 8.

The second extending portion 9 b extends from the first extending portion 9 a in a direction intersecting the first direction inside the housing 6. The second extending portion 9 b is connected to an end of the first extending portion 9 a on one side in the first direction. The second extending portion 9 b extends in a direction orthogonal to the first direction from the first extending portion 9 a. The second extending portion 9 b extends in the second direction out of the directions orthogonal to the first direction. In the present embodiment, the second direction is the Z-axis direction. That is, the second extending portion 9b extends in the Z-axis direction. In the illustrated example, the second extending portion 9 b extends upward from the connecting portion with the first extending portion 9 a. The plurality of bus bars 9 include the bus bar 9 in which the second extending portion 9 b extends upward from the connection portion with the first extending portion 9 a and the bus bar 9 extending in the lower side.

Although not shown, the third extending portion extends from the second extending portion 9 b inside the housing 6 in a direction intersecting the first direction and the second direction. The third extending portion is connected to the end of the second extending portion 9b in the Y-axis direction. The third extending portion extends from the second extending portion 9 b in a direction orthogonal to the first direction and the second direction. The third extending portion extends in a third direction orthogonal to the first direction and the second direction. In the present embodiment, the third direction is the Y-axis direction. That is, the third extending portion extends in the Y-axis direction.

<Bus bar support member>
As shown in FIGS. 3 and 4, the bus bar support member 10 supports the bus bar 9 and is inserted across the first opening 6 c and the second opening 8 c. The bus bar support member 10 is made of resin. 5 and 6 are perspective views of the bus bar support member 10 as viewed in the first direction (one + X direction). FIG. 7 is a perspective view of the bus bar support member 10 as viewed in the other direction (−X direction) in the first direction. When viewed from the first direction (X-axis direction), the length of the bus bar support member 10 in the second direction (Z-axis direction) is smaller than the length in the third direction (Y-axis direction). In the example of the present embodiment, when viewed from the first direction, the bus bar support member 10 has an oval shape. When viewed from the first direction, the bus bar support member 10 has an oval shape in which the Y axis direction is a long axis and the Z axis direction is a short axis.

The bus bar support member 10 has a columnar shape extending in the first direction. The outer peripheral surface of the bus bar support member 10 faces the inner peripheral surface of the first opening 6 c. The outer peripheral surface of the bus bar support member 10 has a portion facing the inner peripheral surface of the first opening 6c. Of the outer peripheral surface of the bus bar support member 10, a portion positioned on one side in the first direction faces the inner peripheral surface of the first opening 6c. The outer peripheral surface of the bus bar support member 10 faces the inner peripheral surface of the second opening 8 c. The outer peripheral surface of the bus bar support member 10 has a portion facing the inner peripheral surface of the second opening 8 c. Of the outer peripheral surface of the bus bar support member 10, the portion positioned on the other side in the first direction faces the inner peripheral surface of the second opening 8c. That is, the outer peripheral surface of the bus bar support member 10 faces the inner peripheral surface of the first opening 6c and the inner peripheral surface of the second opening 8c. Therefore, the insulation between the first opening 6 c of the housing 6 and the bus bar 9 is secured by the bus bar support member 10. The insulation between the second opening 8 c of the inverter case 8 and the bus bar 9 is secured by the bus bar support member 10.

As shown in FIG. 7, of the outer peripheral surface of the bus bar support member 10, the portion facing in the second direction is planar. Of the outer peripheral surface of the bus bar support member 10, the portion facing in the third direction has a convex curved surface shape. The end face of the bus bar support member 10 facing in the first direction has an oval shape. The end surface of the bus bar support member 10 facing in the first direction has an oval shape with the Y axis direction as the long axis and the Z axis direction as the short axis.

The bus bar support member 10 has a through hole 10a, a first recess 10b, a second recess 10c, a protrusion 10d, a first groove 10e, and a second groove 10f. As shown in FIGS. 3 and 4, the through hole 10 a penetrates the bus bar support member 10 in the first direction. The first extending portion 9a is inserted into the through hole 10a. The first extending portion 9a protrudes from the inside of the through hole 10a to one side in the first direction. The first extending portion 9a protrudes from the inside of the through hole 10a to the other side in the first direction.

A sealant is filled between the inner circumferential surface of the through hole 10a and the first extending portion 9a. In this embodiment, the bus bar 9 and the bus bar support member 10 are not insert-molded, and the bus bar 9 and the bus bar support member 10 are manufactured as separate parts and then assembled. Therefore, the ease of assembly of the motor unit 1 and the freedom of arrangement of the members can be enhanced. Since the sealant is filled between through hole 10a of bus bar support member 10 and first extending portion 9a of bus bar 9, oil etc. in housing 6 passes through the gap between bus bar support member 10 and bus bar 9 as an inverter. Infiltration of the case 8 can be suppressed.

The sealant is an adhesive. Therefore, it is possible to fix the bus bar 9 and the bus bar support member 10 while securing the sealability between the bus bar 9 and the bus bar support member 10 by the sealant. For example, since the bus bar 9 and the bus bar support member 10 can be fixed while suppressing the load applied to the members as compared with the case where the first extension 9a of the bus bar 9 is assembled by strong press fitting in the through holes 10 a of the bus bar support member 10 Deformation and misalignment can be suppressed.

The through hole 10 a has a rectangular cross section perpendicular to the first direction. Seeing from the first direction, the through hole 10a has a rectangular shape extending in the third direction. As shown in FIGS. 5 to 7, a plurality of through holes 10a are provided. That is, the bus bar support member 10 has a plurality of through holes 10 a. In the present embodiment, three through holes 10 a are provided. One of the U-phase bus bar 9, the V-phase bus bar 9 and the W-phase bus bar 9 is inserted into the three through holes 10 a. The plurality of through holes 10 a are arranged in a direction orthogonal to the first direction (X-axis direction). The plurality of through holes 10a are arranged at intervals in the Y-axis direction.

As shown in FIGS. 4 to 6, the first recess 10b is disposed on the end face of the bus bar support member 10 facing the other side in the first direction. The first recess 10 b is recessed from the end face of the bus bar support member 10 facing the other side in the first direction to the one side in the first direction. When viewed from the first direction, the first recess 10 b is in the shape of a rectangle extending in the third direction. The opening dimension of the first recess 10 b in the second direction is larger than the opening dimension of the through hole 10 a in the second direction. The opening dimension in the third direction of the first recess 10 b is larger than the opening dimension in the third direction of the through hole 10 a.

The through hole 10a is opened in the first recess 10b. Therefore, when the sealant is filled between the through hole 10 a of the bus bar support member 10 and the first extending portion 9 a of the bus bar 9, the sealant can be held in the first concave portion 10 b. In the present embodiment, the sealant is poured into the first recess 10 b and penetrated into the through hole 10 a. Since the first recess 10 b is provided, it is possible to suppress the sealant from falling down without entering the gap between the bus bar support member 10 and the bus bar 9. Since the sealant remains in the first recess 10b, the sealant can be easily introduced into the through hole 10a opened in the first recess 10b. By temporarily holding the sealing agent in the first concave portion 10 b, it is easy to visually confirm the pouring amount of the sealing agent. The gap between the bus bar support member 10 and the bus bar 9 can be stably filled with a predetermined amount of sealant.

A plurality of through holes 10a open into one first recess 10b. Therefore, by pouring the sealant into one first recess 10b, the sealant can be spread over the plurality of through holes 10a, and the ease of assembly is enhanced. The sealant is uniformly filled in the plurality of through holes 10a. In the example of the present embodiment, the first recess 10 b is a groove extending in the direction in which the plurality of through holes 10 a are arranged. Therefore, the arrangement space of the first recess 10b can be reduced. A sealing agent can be efficiently made to penetrate from the 1st crevice 10b to the inside of a plurality of penetration holes 10a. It is possible to suppress the amount of useless pouring of the sealant which does not reach the inside of the through hole 10a from the first recess 10b.

As shown in FIGS. 4 and 7, the second recess 10 c is disposed on the end face of the bus bar support member 10 facing the first direction one side. The second recess 10 c is recessed from the end surface of the bus bar support member 10 facing the first direction to the other side in the first direction. When viewed from the first direction, the second recess 10 c has a rectangular shape extending in the third direction. The opening dimension of the second recess 10 c in the second direction is larger than the opening dimension of the through hole 10 a in the second direction. The opening dimension of the second recess 10 c in the third direction is larger than the opening dimension of the through hole 10 a in the third direction.

A through hole 10a is opened in the second recess 10c. That is, the through hole 10a penetrates the bus bar support member 10 in the first direction from the bottom surface of the first recess 10b to the bottom surface of the second recess 10c. The bottom surface of the first recess 10 b is a portion of the inner surface of the first recess 10 b facing the other side in the first direction. The bottom surface of the second recess 10 c is a portion of the inner surface of the second recess 10 c that faces one side in the first direction. According to the present embodiment, when the sealant is filled between the through hole 10 a of the bus bar support member 10 and the first extending portion 9 a of the bus bar 9, the sealant may be held in the second recess 10 c. it can. Specifically, when a large amount of the sealant is poured out when the sealant is poured out into the first recess 10b and permeated into the through hole 10a, the excess sealant is removed from the through hole 10a. There is a possibility of leaking to one side in the first direction. In the present embodiment, since the second recess 10 c is provided, even if the excess sealant is leaked from the through hole 10 a to one side in the first direction, it can be stored in the second recess 10 c, and the sealant is It is possible to suppress dripping.

A plurality of second recesses 10c are provided. That is, the bus bar support member 10 has a plurality of second recesses 10 c. In the present embodiment, three second recesses 10 c are provided. The plurality of second recesses 10c are arranged at intervals in the third direction. The end portion on one side in the first direction of the plurality of through holes 10a is opened in each of the bottom surfaces of the plurality of second concave portions 10c. In the example of the present embodiment, the cross-sectional area (opening area) perpendicular to the first direction of the portion of the through hole 10a connected to the second recess 10c becomes larger toward one side in the first direction. According to the present embodiment, the plurality of second recesses 10 c are provided independently of each other on the end face of the bus bar support member 10 facing the first direction one side, so that these second recesses 10 c are connected to one another. As compared with the above, it is easy to secure a large surface area of the inner surface of each second recess 10c. For this reason, it is possible to easily make the remaining sealant remain in the second recess 10c. Further, since the plurality of second concave portions 10c are disposed apart from each other, the bus bar 9 can be easily inserted from the respective second concave portions 10c into the through holes 10a when assembling the motor unit 1, and the assembly becomes easy.

As shown in FIG. 4, the depth in the first direction of the second recess 10 c is deeper than the depth in the first direction of the first recess 10 b. The volume of the second recess 10 c is larger than the volume of the first recess 10 b. Therefore, it is possible to further suppress dripping of the sealant remaining from the second recess 10c.

As shown in FIGS. 4 to 7, the convex portion 10 d protrudes from the outer peripheral surface of the bus bar support member 10 in the direction intersecting the first direction. The convex portion 10 d protrudes from the outer peripheral surface of the bus bar support member 10 in the second direction (Z-axis direction). In the example of the present embodiment, the convex portion 10d has a rectangular parallelepiped shape. When viewed from the first direction (X-axis direction), the protrusion 10 d has a rectangular shape elongated in the third direction (Y-axis direction). When viewed from the second direction (Z-axis direction), the convex portion 10d has a rectangular shape elongated in the third direction.

As shown in FIG. 4, the protrusion 10 d is disposed between the housing 6 and the inverter case 8 in the first direction, and contacts the housing 6 and the inverter case 8. Therefore, when the inverter case 8 is assembled to the housing 6, the convex portion 10 d of the bus bar support member 10 is sandwiched between the housing 6 and the inverter case 8 in the first direction. It is possible to suppress movement of the bus bar support member 10 in the first direction with respect to the housing 6 and the inverter case 8. A screw member or the like for fixing the bus bar support member 10 to the housing 6 and the inverter case 8 becomes unnecessary, the structure is simplified, and the assembly of the motor unit 1 becomes easy. Even if the mounting direction of the bus bar supporting member 10 with respect to the housing 6 and the inverter case 8 is limited by providing the convex portion 10 d in the bus bar supporting member 10, in the present embodiment, the bus bar supporting member 10 and the bus bar are as described above. And 9 are assembled. Therefore, the assembly of the motor unit 1 becomes easy, and the freedom of arrangement of the members can be secured.

As shown in FIGS. 4 to 7, the convex portion 10 d is disposed on a portion of the outer peripheral surface of the bus bar support member 10 facing the second direction. When viewed from the first direction, the portion of the outer peripheral surface of the bus bar support member 10 facing the second direction (short axis direction) is the portion of the outer peripheral surface of the bus bar support member 10 facing the third direction (long axis direction) Also, a large area (peripheral dimension) in which the convex portion 10d is disposed can be secured. For this reason, by disposing the convex portion 10 d in a portion facing the second direction of the outer peripheral surface of the bus bar support member 10, the freedom degree of the shape and the arrangement of the convex portion 10 d is enhanced. Further, since the convex portion 10 d is sandwiched between the housing 6 and the inverter case 8, it is possible to suppress the falling-down of the bus bar support member 10 in the first direction. Note that “falling in” is rotation of the bus bar support member 10 about a virtual axis (Y axis) extending in the third direction.

As shown in FIGS. 4 and 6, the protrusions 10 d are disposed at both ends of the outer peripheral surface of the bus bar support member 10 facing in the second direction. Therefore, the fall-down of the bus bar support member 10 can be further suppressed, and the attachment attitude of the bus bar support member 10 is stabilized.

When viewed from the first direction, a plurality of convex portions 10 d are provided on the outer peripheral surface of the bus bar support member 10 at intervals. The mounting posture of the bus bar support member 10 can be further stabilized by the plurality of convex portions 10 d. A plurality of convex portions 10 d are provided on the outer peripheral surface of the bus bar support member 10 at intervals in the third direction. In the example of the present embodiment, three bus bar support members 10 (total six) are provided at both ends of the bus bar support member 10 in the second direction. According to the present embodiment, since the plurality of convex portions 10 d are arranged in the third direction, it is possible to suppress rotation of the bus bar support member 10 about a virtual axis (Z axis) extending in the second direction.

The protrusion 10 d has a protrusion 10 g and a flat portion 10 h. The protrusion 10 g is provided on at least one of both end surfaces of the protrusion 10 d facing in the first direction. In the present embodiment, the protrusion 10 g is provided on only one of both end surfaces of the protrusion 10 d facing in the first direction. The protrusion 10 g protrudes in the first direction from the end face of the protrusion 10 d facing the first direction. When the motor unit 1 is assembled, the projection 10g of the projection 10d is crushed in the first direction between the housing 6 and the inverter case 8, and the approaching movement of the housing 6 and the inverter case 8 in the first direction is performed. Tolerate. The protrusion 10g can be plastically deformed, for example, beyond the elastic deformation region. The protrusion 10 g is, for example, a crush rib.

By the projection 10g being crushed, alignment of the housing 6 and the inverter case 8 in the first direction becomes easy. When the housing 6 and the inverter case 8 are tightened and fixed in the screw member 6 f (see FIG. 3) from the second direction (Z-axis direction) orthogonal to the first direction as in the present embodiment, the screw member The screw hole of the collar portion 8a through which 6f is passed and the screw hole of the top wall of the motor housing 6a into which the screw member 6f is tightened can be easily aligned. Although the bus bar support member 10 is made of insulating resin and it is difficult to ensure the dimensional accuracy after molding, according to the present embodiment, the allowable range of the dimensional accuracy of the bus bar support member 10 can be expanded. By collapsing the protrusion 10g, the state in which the protrusion 10d is in contact with both the housing 6 and the inverter case 8 is maintained, and the bus bar support member 10 moves relative to the housing 6 and the inverter case 8 after assembly. It is possible to suppress (wobble). According to the present embodiment, the motor unit 1 can be easily assembled.

In the present embodiment, a plurality of projections 10d are provided, and each projection 10d is provided with the projection 10g. Therefore, the magnitude and balance of the force when pushing the inverter case 8 in the first direction with respect to the housing 6 at the time of assembly. Accordingly, the number and arrangement of the protrusions 10g can be optimized.

In the present embodiment, the protrusion 10 g is provided on the end surface facing the other side of the protrusion 10 d in the first direction. The protrusion 10 g protrudes from the end face of the protrusion 10 d facing the other side in the first direction, and contacts the inverter case 8. An end face of the convex portion 10 d that faces one side in the first direction contacts the housing 6. The end face of the convex portion 10 d facing one side in the first direction contacts the wall 6 e of the motor housing 6 a from the other side in the first direction. According to this embodiment, when the motor unit 1 is assembled, the bus bar support member 10 is brought into contact with the housing 6 from the other side in the first direction and positioned in the first direction. It can be fixed and the inverter case 8 can be attached to the housing 6. At the time of assembly, movement of the bus bar support member 10 to one side in the first direction with respect to the housing 6 is suppressed, and application of a load to a fixed portion between the bus bar 9 and the bus bar support member 10 can be suppressed. Further, the bus bar support member 10 and the inverter case 8 can be stably assembled.

As shown in FIGS. 5 and 6, the protrusion 10 g is a rib extending in the direction in which the protrusion 10 d protrudes from the outer peripheral surface of the bus bar support member 10. In the present embodiment, the protrusion 10 d protrudes from the outer peripheral surface of the bus bar support member 10 in the second direction, and the protrusion 10 g extends in the second direction. Since the protrusion 10g is a rib, for example, the protrusion 10g can be formed more easily than the dot-like protrusion 10g or the like, and the function of the protrusion 10g is stabilized.

As the protrusion 10 g is separated from the end face of the protrusion 10 d in the first direction in the first direction, the cross-sectional area perpendicular to the first direction decreases. In the present embodiment, as the protrusion 10 g separates from the end face of the protrusion 10 d facing the other side in the first direction to the other side in the first direction, the cross-sectional area perpendicular to the first direction decreases. In the example of the present embodiment, the cross-sectional shape of the protrusion 10 g perpendicular to the second direction is a triangular shape that tapers in the first direction from the end face of the protrusion 10 d facing the first direction. Therefore, at the stage where the projection 10g starts to contact the inverter case 8 at the time of assembling the motor unit 1, the projection 10g can be easily deformed and the inverter case 8 can be easily moved closer to the housing 6. Thereafter, in the step of accurately aligning the inverter case 8 with the housing 6, the projection 10g is not easily deformed, and the relative position between the housing 6 and the inverter case 8 can be easily finely adjusted.

The flat portion 10 h is provided on an end surface facing the first direction one side of the convex portion 10 d. The flat portion 10 h has a planar shape extending perpendicularly to the first direction (X-axis direction). The flat portion 10 h contacts the housing 6. The flat portion 10 h contacts the wall 6 e of the motor housing 6 a from the other side in the first direction. When the motor unit 1 is assembled, by bringing the flat portion 10h of the convex portion 10d into contact with the housing 6, the end face on one side in the first direction of the convex portion 10d can be used as a reference surface. That is, the projection 10g of the end face on the other side of the first direction of the protrusion 10d while positioning the bus bar support member 10 in the first direction with respect to the housing 6 using the end surface on the first direction one side of the protrusion 10d. Thus, the above-described effects can be obtained.

As shown in FIG. 4, the first groove portion 10 e is provided in a portion of the outer peripheral surface of the bus bar support member 10 facing the inner peripheral surface of the first opening 6 c. The first groove portion 10 e is disposed in a portion of the outer peripheral surface of the bus bar support member 10 positioned on one side in the first direction. The first groove portion 10 e is disposed on one side of the outer peripheral surface of the bus bar support member 10 in the first direction than the convex portion 10 d. The first groove portion 10 e has an annular shape extending along the inner peripheral surface of the first opening 6 c when viewed from the first direction. The first groove portion 10 e has a long oval shape in the third direction when viewed from the first direction.

The second groove portion 10 f is provided in a portion of the outer peripheral surface of the bus bar support member 10 facing the inner peripheral surface of the second opening hole 8 c. The second groove portion 10 f is disposed in a portion of the outer peripheral surface of the bus bar support member 10 located on the other side in the first direction. The second groove portion 10 f is arranged on the other side in the first direction than the convex portion 10 d in the outer peripheral surface of the bus bar support member 10. The second groove portion 10 f has an annular shape extending along the inner peripheral surface of the second opening 8 c when viewed from the first direction. The second groove portion 10 f has a long oval shape in the third direction when viewed from the first direction.

<First seal part>
The first seal portion 11 is disposed between the inner peripheral surface of the first opening 6 c and the outer peripheral surface of the bus bar support member 10 facing the inner peripheral surface. The first seal portion 11 contacts the inner circumferential surface of the first opening 6 c and the outer circumferential surface of the bus bar support member 10. The first seal portion 11 is elastically deformable. The first seal portion 11 is annular. When viewed from the first direction, the first seal portion 11 has an oval shape extending along the outer peripheral surface of the bus bar support member 10. In the present embodiment, the first seal portion 11 is an O-ring or the like provided as a separate member from the bus bar support member 10.

At the time of assembly of the motor unit 1, the bus bar support member 10 is inserted into the first opening 6 c of the housing 6, whereby the first seal portion 11 is formed by the inner peripheral surface of the first opening 6 c and the outer peripheral surface of the bus bar support 10. And seal between these circumferential surfaces. That is, the first seal portion 11 seals between the first opening 6 c and the bus bar support member 10 in the radial direction assuming that the first extending portion 9 a of the bus bar 9 is a central axis. Therefore, the first seal portion 11 can suppress the entry of foreign matter such as water from the outside of the housing 6 and the leakage of oil and the like from the inside of the housing 6 to the outside. According to the present embodiment, the structure can be simplified while securing the insulation of the bus bar 9 and the sealing of the first opening 6c.

The first seal portion 11 is disposed in the first groove portion 10 e. Therefore, the attachment of the first seal portion 11 is easy, and the positional deviation of the first seal portion 11 at the assembly and after the assembly of the motor unit 1 is suppressed. The sealing performance of the first seal portion 11 is stably ensured by the first groove portion 10 e.

<Second seal part>
The second seal portion 12 is disposed between the inner peripheral surface of the second opening 8 c and the outer peripheral surface of the bus bar support member 10 facing the inner peripheral surface. The second seal portion 12 is in contact with the inner peripheral surface of the second opening 8 c and the outer peripheral surface of the bus bar support member 10. The second seal portion 12 is elastically deformable. The second seal portion 12 is annular. When viewed from the first direction, the second seal portion 12 has an oval shape extending along the outer peripheral surface of the bus bar support member 10. In the present embodiment, the second seal portion 12 is an O-ring or the like provided as a separate member from the bus bar support member 10.

At the time of assembly of the motor unit 1, the bus bar support member 10 is inserted into the second opening hole 8 c of the inverter case 8, whereby the second seal portion 12 is formed by the inner peripheral surface of the second opening hole 8 c and the outer periphery of the bus bar support member 10. Contact with the surface to seal between these circumferential surfaces. That is, the second seal portion 12 seals between the second opening 8 c and the bus bar support member 10 in the radial direction when the first extending portion 9 a of the bus bar 9 is assumed to be the central axis. Therefore, the second seal portion 12 can suppress the entry of foreign matter such as water from the outside of the inverter case 8 to the inside. According to the present embodiment, the structure can be simplified while securing the insulation of the bus bar 9 and the seal of the second opening 8 c.

The second seal portion 12 is disposed in the second groove portion 10 f. Therefore, attachment of the 2nd seal part 12 is easy, and position shift of the 2nd seal part 12 at the time of assembling of motor unit 1 and after assembling is controlled. The sealing performance of the second seal portion 12 is stably ensured by the second groove portion 10 f.

Further, in the present embodiment, the relative position between the first opening 6c and the first groove 10e in the first direction is stabilized by the projection 10d being sandwiched between the housing 6 and the inverter case 8 in the first direction. . Therefore, the relative position of the first opening 6c and the first seal portion 11 in the first direction is stabilized. Further, the convex portion 10 d is sandwiched in the first direction between the housing 6 and the inverter case 8, whereby the relative position in the first direction between the second opening 8 c and the second groove portion 10 f is stabilized. Therefore, the relative position between the second opening 8 c and the second seal portion 12 in the first direction is stabilized. For this reason, the sealing function by the 1st seal part 11 and the 2nd seal part 12 is maintained satisfactorily.

Further, in the present embodiment, the bus bar 9 has a second extending portion 9 b extending in a direction different from the first extending portion 9 a, and the bus bar 9 bends inside the housing 6. Furthermore, the bus bar 9 has a third extending portion extending in a direction different from that of the first extending portion 9a and the second extending portion 9b. According to the present embodiment, the motor unit 1 can be easily assembled even with such a shape of the bus bar 9. In addition, since convex portion 10d is provided on bus bar support member 10, bus bar 9 is not connected to a portion other than first extending portion 9a at the end of bus bar 9 in the first direction on one side. Even when a force about the virtual axis (Y axis) extending in the third direction acts on the bus bar support member 10 via the interposition, the rotation (falling) of the bus bar support member 10 about the virtual axis is suppressed.

When the inverter case 8 and the motor housing 6a are arranged adjacent to each other in the radial direction of the motor shaft J2 as in the present embodiment, the support structure of the bus bar 9 across these members is easily complicated. However, according to the present embodiment, the support structure of the bus bar 9 can be simplified, and the assembly of the motor unit is easy.

Further, in the present embodiment, since the inverter case 8 and the motor housing 6a are horizontally adjacent to each other, the external dimension of the motor unit 1 in the vertical direction (gravity direction) can be reduced. Therefore, the motor unit 1 can be easily accommodated in a limited installation space of a vehicle or the like.

The present invention is not limited to the above-described embodiment. For example, as described below, changes in configuration and the like are possible without departing from the spirit of the present invention.

In the above-mentioned embodiment, although projection part 10g provided in convex part 10d presupposed that it is a rib, it is not limited to this. The protrusion 10 g may be a dot-like protrusion that protrudes in the first direction from the end face of the protrusion 10 d facing the first direction. Further, a plurality of protrusions 10 g may be provided on the protrusion 10 d.

The first seal portion 11 may not be an O-ring. The first seal portion 11 may be liquid or gel. The first seal portion 11 may be made of silicone resin. The first seal portion 11 may not be elastically deformable. The first seal portion 11 may be made of metal. The first seal portion 11 and the bus bar support member 10 may be parts of a single member manufactured by two-color molding.

The second seal portion 12 may not be an O-ring. The second seal portion 12 may be liquid or gel. The second seal portion 12 may be made of silicone resin. The second seal portion 12 may not be elastically deformable. The second seal portion 12 may be made of metal. The second seal portion 12 and the bus bar support member 10 may be part of a single member produced by two-color molding.

In the embodiment described above, the second seal portion 12 is disposed between the inner peripheral surface of the second opening 8 c and the outer peripheral surface of the bus bar support member 10 facing the inner peripheral surface, and the second seal 12 Although it contacts the inner peripheral surface and the outer peripheral surface of the bus bar support member 10, it is not limited to this. In the modification shown in FIG. 8, the first cylindrical portion 6g extending from the wall 6e to the other side in the first direction is provided in the wall 6e of the housing 6, and the first opening 6c is disposed in the first cylindrical portion 6g. Be done. Further, a second cylindrical portion 8f extending from the wall portion 8b to one side in the first direction is provided in the wall portion 8b of the inverter case 8, and the second opening 8c is disposed in the second cylindrical portion 8f. In FIG. 8, assuming that the first extending portion 9 a of the bus bar 9 is a central axis, the second cylindrical portion 8 f is disposed radially outside the first cylindrical portion 6 g. Further, when viewed from the radial direction, the second cylindrical portion 8f and the first cylindrical portion 6g are disposed to overlap. In this modification, the second seal portion 12 is disposed between the inner peripheral surface of the second opening hole 8c and the outer peripheral surface of the first cylindrical portion 6g facing the inner peripheral surface, and the second seal portion 12 of the second opening hole 8c is Contacting the inner circumferential surface and the outer circumferential surface of the first cylindrical portion 6g seals between the circumferential surfaces. Also in this case, the second seal portion 12 can suppress the entry of foreign matter such as water from the outside of the inverter case 8 to the inside. In the example shown in FIG. 8, the housing 6 has a second groove 6h in a portion facing the inner peripheral surface of the second opening 8c in the outer peripheral surface of the first cylindrical portion 6g. The second seal portion 12 is disposed in the second groove 6 h.

In the above-described embodiment, the adhesive as the sealant is filled between the through hole 10 a of the bus bar support member 10 and the first extending portion 9 a of the bus bar 9. However, the present invention is not limited to this. The sealant may have sealing properties, and may be a liquid other than an adhesive, a gel, or the like. Further, although a plurality of through holes 10 a are provided in the bus bar support member 10, only one through hole 10 a may be provided in the bus bar support member 10. In this case, the plurality of first extending portions 9a are inserted into the through holes 10a.

In addition, without departing from the spirit of the present invention, each configuration (component) described in the above-described embodiment, modification, and note may be combined, and addition, omission, replacement, and other configurations can be made. Changes are possible. Moreover, this invention is not limited by embodiment mentioned above, It is limited only by the claim.

DESCRIPTION OF SYMBOLS 1 ... Motor unit, 2 ... Motor, 6 ... Housing, 6a ... Motor accommodation part, 6c ... 1st opening hole, 10f ... 2nd groove part, 7 ... Inverter, 8 ... Inverter case, 8c ... 2nd opening hole, 9 ... Bus bar 9a: first extension portion 9b: second extension portion 10: bus bar support member 10d: convex portion 10e: first groove portion 10g: projection portion 10h: flat portion 11: first seal portion 12 ... 2nd seal part, J2 ... motor shaft

Claims

Motor,
An inverter for supplying power to the motor;
A bus bar having a first extending portion extending in a first direction and connecting the motor and the inverter;
A housing having a first opening through which the first extension portion passes, the housing containing the motor;
An inverter case having a second opening that faces the first opening and the first direction and through which the first extending portion passes, and the inverter is accommodated;
A bus bar support member that supports the bus bar and is inserted across the first opening and the second opening;
It is disposed between the inner peripheral surface of the first opening and the outer peripheral surface of the bus bar support member facing the inner peripheral surface, and is in contact with the inner peripheral surface of the first opening and the outer peripheral surface of the bus bar support And a first seal portion.
The motor unit according to claim 1,
The bus bar support member has a first groove in a portion of the outer peripheral surface of the bus bar support member facing the inner peripheral surface of the first opening.
The first groove portion has an annular shape extending along the inner peripheral surface of the first opening, as viewed in the first direction;
The motor unit, wherein the first seal portion is disposed in the first groove portion.
A motor unit according to claim 1 or 2, wherein
It is disposed between the inner peripheral surface of the second opening and the outer peripheral surface of the bus bar support member facing the inner peripheral surface, and is in contact with the inner peripheral surface of the second opening and the outer peripheral surface of the bus bar support A motor unit comprising a second seal portion.
The motor unit according to claim 3,
The bus bar support member has a second groove in a portion of the outer peripheral surface of the bus bar support member facing the inner peripheral surface of the second opening,
The second groove has an annular shape extending along the inner circumferential surface of the second opening, as viewed in the first direction;
The motor unit, wherein the second seal portion is disposed in the second groove portion.
The motor unit according to any one of claims 1 to 4, wherein
The bus bar support member has a convex portion protruding in a direction intersecting the first direction from an outer peripheral surface of the bus bar support member,
The motor unit is disposed between the housing and the inverter case in the first direction and in contact with the housing and the inverter case.
The motor unit according to claim 5, wherein
The motor unit according to claim 1, wherein the protrusion includes a protrusion protruding from the end surface in the first direction on at least one of both end surfaces of the protrusion facing the first direction.
The motor unit according to claim 6, wherein
An end face of the convex portion facing the first direction one side contacts the housing,
The motor unit protrudes from an end face of the convex portion facing the other side in the first direction and contacts the inverter case.
The motor unit according to claim 7, wherein
The motor unit, wherein the convex portion has a flat portion in contact with the housing on an end face of the convex portion facing the first direction on one side.
A motor unit according to any one of claims 6 to 8, wherein
The motor unit, wherein the protrusion is a rib extending in a direction in which the protrusion protrudes from an outer peripheral surface of the bus bar support member.
The motor unit according to any one of claims 6 to 9, wherein
The motor unit, wherein the protrusion has a smaller cross-sectional area perpendicular to the first direction as the protrusion separates in the first direction from an end face of the protrusion facing the first direction.
The motor unit according to any one of claims 5 to 10, wherein
When viewed from the first direction, a plurality of the convex portions are provided on the outer peripheral surface of the bus bar support member at intervals.
The motor unit according to any one of claims 5 to 11, wherein
When viewed from the first direction, the bus bar support member has a length in a second direction orthogonal to the first direction smaller than a length in a third direction orthogonal to the first direction and the second direction,
The motor unit, wherein the convex portion is disposed in a portion of the outer peripheral surface of the bus bar support member facing the second direction.
A motor unit according to claim 12, wherein
The motor unit, wherein the convex portions are disposed at both ends of the outer peripheral surface of the bus bar support member facing the second direction.
The motor unit according to any one of claims 1 to 13, wherein
The motor unit, wherein the bus bar has a second extending portion extending in a direction intersecting the first direction from the first extending portion inside the housing.
The motor unit according to any one of claims 1 to 14, wherein
The housing has a motor accommodating portion for accommodating the motor.
A motor shaft of the motor extends in a direction orthogonal to the first direction;
The motor unit, wherein the inverter case is disposed adjacent to the motor housing portion in the radial direction of the motor shaft.
The motor unit according to claim 15.
A motor unit in which the inverter case and the motor accommodating portion are horizontally adjacent to each other.