CN113285562A - Drive device - Google Patents

Abstract

The present invention provides a driving device, which is provided with: a motor having a rotor rotatable about a motor shaft and a stator located radially outside the rotor; a first oil injection part and a second oil injection part having injection ports for injecting oil toward the stator; and an oil supply passage connected to both the first oil jet unit and the second oil jet unit. The motor has: a first bearing rotatably supporting one axial side of the rotor; and a second bearing rotatably supporting the other axial side of the rotor. The first oil injection portion has a first supply port that supplies oil to the first bearing. The second oil jet portion has a second supply port for supplying oil to the second bearing.

Description

Drive device

Technical Field

The present invention relates to a drive device.

Background

There is known a structure in which an oil jet portion that jets oil to cool a stator has a supply port that supplies the oil to a bearing that rotatably supports a rotor. For example, patent document 1 describes a pipe as such an oil jet part.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-259644

Disclosure of Invention

Problems to be solved by the invention

A plurality of bearings rotatably supporting the rotor are provided. Therefore, a plurality of supply ports are required to supply oil to the bearings. However, if a plurality of supply ports are provided in the oil jet portion, the pressure in the oil jet portion may be greatly reduced, and the potential of the oil jetted from the oil jet portion to the stator may be reduced.

In view of the above, an object of the present invention is to provide a drive device having a structure capable of suppressing a drop in the potential of oil injected to a stator.

Means for solving the problems

One aspect of the driving device of the present invention includes: a motor having a rotor rotatable about a motor shaft and a stator located radially outside the rotor; a first oil injection unit and a second oil injection unit having injection ports for injecting oil toward the stator; and an oil supply passage connected to both the first oil ejecting portion and the second oil ejecting portion. The motor comprises: a first bearing that rotatably supports one axial side of the rotor; and a second bearing that rotatably supports the other axial side of the rotor. The first oil injection portion has a first supply port for supplying oil to the first bearing. The second oil ejecting portion has a second supply port for supplying oil to the second bearing.

Effects of the invention

According to an aspect of the present invention, a drop in the potential of oil injected to the stator can be suppressed.

Drawings

Fig. 1 is a schematic configuration diagram schematically showing a driving device according to a first embodiment.

Fig. 2 is a perspective view showing the stator, the first oil squirter, and the second oil squirter of the first embodiment.

Fig. 3 is a view of the stator, the first oil squirter, and the second oil squirter of the first embodiment as viewed from above.

Fig. 4 is a perspective cross-sectional view showing the first oil jet unit, the oil passage unit, and a guide unit for guiding oil to the oil passage unit according to the first embodiment.

Fig. 5 is a cross-sectional view showing the first oil jet unit, the second oil jet unit, the oil path unit, and the guide unit for guiding oil to the oil path unit according to the first embodiment.

Fig. 6 is a cross-sectional view showing the first oil jet part and the first bearing according to the first embodiment.

Fig. 7 is a sectional view showing the second oil squirter and the second bearing according to the first embodiment.

Fig. 8 is a sectional view showing a part of the driving device of the first embodiment, and is a sectional view VIII-VIII of fig. 1.

Fig. 9 is a view of a part of the second oil squirting component of the first embodiment as viewed in the second direction.

Fig. 10 is a sectional view showing a first oil jet part and a first bearing according to a second embodiment.

Fig. 11 is a sectional view showing a second oil squirter and a second bearing according to a second embodiment.

Fig. 12 is a cross-sectional view showing the first oil jet unit, the oil passage unit, and a guide unit for guiding oil to the oil passage unit according to the third embodiment.

In the figure:

1-drive device, 2-motor, 6-housing, 11, 211, 311-first oil jet, 12, 212-second oil jet, 13a, 13b, 14a, 14 b-jet, 15a, 215a, 315 a-first supply port, 15b, 215 b-second supply port, 16a, 216 a-first through hole, 16b, 216 b-second through hole, 16 c-extension surface, 16D-inclined surface, 17a, 17 b-opening portion, 20-rotor, 26-first bearing, 27-second bearing, 30-stator, 94-oil supply path, 219-guide portion, D2-second direction, D3-third direction, J1-motor shaft, O-oil.

Detailed Description

In the following description, the vertical direction is defined based on the positional relationship when the drive device according to each embodiment is mounted on a vehicle on a horizontal road surface. That is, the relative positional relationship with respect to the vertical direction described in each of the embodiments below may satisfy at least a case where the drive device is mounted on a vehicle located on a horizontal road surface.

In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is the vertical direction. The + Z side is the upper side in the vertical direction, and the-Z side is the lower side in the vertical direction. In the following description, the vertical upper side is simply referred to as "upper side", and the vertical lower side is simply referred to as "lower side". The X-axis direction is a direction orthogonal to the Z-axis direction and is a front-rear direction of a vehicle on which the driving device is mounted. In the following embodiments, the + X side is the front side of the vehicle and the-X side is the rear side of the vehicle. The Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction, and is a vehicle lateral direction, i.e., a vehicle width direction. In the following embodiments, the + Y side is the left side of the vehicle and the-Y side is the right side of the vehicle. The front-back direction and the left-right direction are horizontal directions orthogonal to the vertical direction.

The positional relationship in the front-rear direction is not limited to the positional relationship in the following embodiments, and the + X side may be the rear side of the vehicle and the-X side may be the front side of the vehicle. In this case, the + Y side is the right side of the vehicle and the-Y side is the left side of the vehicle.

A motor shaft J1 shown in each figure as appropriate extends in a direction intersecting the vertical direction. More specifically, the motor shaft J1 extends in the Y-axis direction orthogonal to the vertical direction, i.e., in the lateral direction of the vehicle. In the following description, unless otherwise specified, a direction parallel to the motor shaft J1 is simply referred to as "axial direction", a radial direction centering on the motor shaft J1 is simply referred to as "radial direction", and a circumferential direction centering on the motor shaft J1, that is, an axis around the motor shaft J1 is simply referred to as "circumferential direction". In the present specification, the "parallel direction" also includes a substantially parallel direction, and the "orthogonal direction" also includes a substantially orthogonal direction. In the following embodiments, the + Y side, i.e., the left side, corresponds to one axial side, and the-Y side, i.e., the right side, corresponds to the other axial side. The axial direction corresponds to a predetermined first direction.

< first embodiment >

A drive device 1 of the present embodiment shown in fig. 1 is mounted on a vehicle having a motor as a power source, such as a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an Electric Vehicle (EV), and is used as a power source thereof. As shown in fig. 1, the drive device 1 includes a motor 2, a transmission device 3 including a reduction gear 4 and a differential 5, a casing 6, an oil pump 96, a cooler 97, a first oil jet unit 11, and a second oil jet unit 12. As shown in fig. 1 to 3, in the present embodiment, the motor 2 is an inner rotor type motor. The motor 2 has a rotor 20, a stator 30, a first bearing 26, and a second bearing 27. In the present embodiment, the drive device 1 does not include an inverter unit. In other words, the drive device 1 has a structure separate from the inverter unit.

The housing 6 accommodates the motor 2 and the transmission device 3 therein. The housing 6 has a motor accommodating portion 61, a gear accommodating portion 62, and a partition wall 63. The motor housing 61 is a portion that houses therein the rotor 20 and the stator 30, which will be described later. The gear housing 62 is a portion that houses the transmission device 3 therein. The gear housing 62 is located on the left side of the motor housing 61. The bottom portion 61a of the motor accommodating portion 61 is located above the bottom portion 62a of the gear accommodating portion 62. The partition wall 63 axially divides the inside of the motor housing 61 and the inside of the gear housing 62. The partition wall 63 is provided with a partition wall opening 63 a. The partition wall opening 63a connects the inside of the motor accommodating portion 61 and the inside of the gear accommodating portion 62. The partition wall 63 is located on the left side of the stator 30.

The casing 6 internally accommodates oil O as a refrigerant. In the present embodiment, oil O is contained in the motor containing section 61 and the gear containing section 62. An oil sump P for storing oil O is provided in a lower region inside the gear housing 62. The oil O in the oil sump P is fed to the inside of the motor housing 61 through an oil passage 90 described later. The oil O sent to the inside of the motor housing 61 is stored in a lower region of the inside of the motor housing 61. At least a part of the oil O stored in the motor housing 61 moves to the gear housing 62 through the partition opening 63a and returns to the oil reservoir P.

In the present specification, the phrase "oil is contained in a certain portion" means that the oil is only required to be contained in the certain portion at least in a part during driving of the motor, and the oil may not be contained in the certain portion when the motor is stopped. For example, in the present embodiment, the fact that the oil O is contained in the motor housing portion 61 means that the oil O may be located in the motor housing portion 61 at least in part during driving of the motor 2, and the oil O in the motor housing portion 61 may be entirely moved to the gear housing portion 62 through the partition wall opening 63a when the motor 2 is stopped. A part of the oil O fed to the inside of the motor housing portion 61 through an oil passage 90 described later may be left inside the motor housing portion 61 in a state where the motor 2 is stopped.

The oil O circulates in an oil passage 90 described later. The oil O is used for lubricating the reduction gear 4 and the differential 5. In addition, the oil O is used for cooling the motor 2. As the oil O, in order to function as a lubricating oil and a cooling oil, it is preferable to use an oil equivalent to an Automatic Transmission lubricating oil (ATF) having a low viscosity.

As shown in fig. 4 and 5, the housing 6 includes a support portion 64, a plurality of radial ribs 65, a first rib 66, and a second rib 67. That is, the driving device 1 includes the support portion 64, the plurality of radial ribs 65, the first rib 66, and the second rib 67. As shown in fig. 6, the support portion 64 protrudes rightward from the partition wall 63. The support portion 64 is located inside the motor housing portion 61. The support portion 64 is annular around the motor shaft J1. More specifically, the support portion 64 is a cylindrical shape that is open on both sides in the axial direction about the motor shaft J1. The support portion 64 supports the first bearing 26 on the inner side. The support portion 64 has a small diameter portion 64a and a large diameter portion 64 b.

The small diameter portion 64a is a left side portion of the support portion 64. The left end of the small diameter portion 64a is connected to the partition wall 63. The large diameter portion 64b is a right side portion of the support portion 64. The large diameter portion 64b has an inner diameter larger than that of the small diameter portion 64 a. The first bearing 26 is supported radially inward of the large diameter portion 64 b. A step 64h is provided on the inner circumferential surface of the support portion 64 between the small diameter portion 64a and the large diameter portion 64b in the axial direction. A step surface 64i of the step 64h toward the right supports the outer race of the first bearing 26 from the left side.

As shown in fig. 4, the support portion 64 has a through portion 64c that penetrates the support portion 64 from the outer surface to the inner surface. In the present embodiment, the through portion 64c is a groove that is recessed to the left side (+ Y side) and extends in the radial direction. The through portion 64c opens on the right side (Y side), and opens inside the motor housing portion 61. The through portion 64c is provided in an upper portion of the support portion 64. As shown in fig. 5, in the present embodiment, the through portion 64c extends in a direction inclined with respect to the vertical direction among the radial directions as viewed in the axial direction. The through portion 64c extends in a direction inclined obliquely forward to the lower side from the outer side surface of the support portion 64, for example.

The through portion 64c has an inner groove portion 64f and an outer groove portion 64 g. The inner groove portion 64f is provided in a radially inner portion of the support portion 64. The inner groove portion 64f is provided on the step surface 64 i. The outer groove portion 64g is provided on the radially outer portion of the support portion 64. The outer groove portion 64g penetrates the large diameter portion 64b in the axial direction and is provided to the small diameter portion 64 a. The outer groove portion 64g is continuous with the radially outer side of the inner groove portion 64 f. The groove bottom surface of the outer groove 64g is an inclined surface 64 e. As shown in fig. 4 and 6, the inclined surface 64e is located on the right side from the radially outer side toward the radially inner side. The radially inner end portion of the inclined surface 64e is connected to the radially outer end portion of the groove bottom surface of the inner groove portion 64 f. The inclined surface 64e is provided on the small diameter portion 64 a. The inclined surface 64e is located on the left side of the first bearing 26.

The plurality of radial ribs 65 protrude rightward from the partition wall 63. The protruding height of the radial ribs 65 is smaller than that of the support portion 64. That is, the right end of the radial rib 65 is located on the left side of the right end of the support portion 64. As shown in fig. 4 and 5, the radial ribs 65 extend radially outward from the outer surface of the support portion 64. The plurality of radial ribs 65 are arranged at intervals in the circumferential direction. Of the radial ribs 65, the radial rib 65 extending from the outer side surface of the support portion 64 to the upper side is continuous with the wall portion 61c located on the upper side among the wall portions of the motor accommodating portion 61.

The first rib 66 protrudes radially outward from the outer side surface of the support portion 64. In the present embodiment, the first rib 66 protrudes upward from an upper portion of the outer side surface of the support portion 64. More specifically, the first rib 66 protrudes diagonally rearward toward the upper side. As shown in fig. 5, the inclination of the first rib 66 with respect to the vertical direction in the direction in which it protrudes radially outward is smaller than the inclination of the through portion 64c with respect to the vertical direction in the direction in which it extends. The radially outer end of the first rib 66 is located radially inward of the radially outer end of the radial rib 65. The first rib 66 protrudes radially outward from the outer peripheral surface of a portion of the support portion 64 located above and forward of the portion where the through portion 64c is provided. The first rib 66 is disposed at a position separated from the through portion 64c in the circumferential direction.

As shown in fig. 4 and 6, the first rib 66 extends in the axial direction. The right end of the first rib 66 is located at the right end of the support portion 64. The end on the left side of the first rib 66 is connected to the radially inner end of one of the plurality of radial ribs 65. At least a portion of the first rib 66 is inserted inside the first coil end 33 a. Thereby, the partition wall 63 can be made closer to the first coil end 33a in the axial direction than in the case where the first rib 66 is not inserted inside the first coil end 33 a. Therefore, the drive device 1 can be easily downsized in the axial direction. As shown in fig. 6, in the present embodiment, the end portion of the first rib 66 on the right side is inserted inside the first coil end 33 a.

As shown in fig. 4 and 5, the second rib 67 projects radially outward from the peripheral edge of the through portion 64c on the outer surface of the support portion 64. More specifically, the second rib 67 protrudes radially outward from a rear portion of the peripheral edge portion of the through portion 64 c. The second rib 67 projects obliquely rearward toward the upper side, for example. As viewed in the axial direction, the inclination of the direction in which the second rib 67 protrudes radially outward with respect to the vertical direction is larger than the inclination of the direction in which the through portion 64c extends with respect to the vertical direction and the inclination of the direction in which the first rib 66 protrudes with respect to the vertical direction. The radially outer end of the second rib 67 is located radially inward of the radially outer end of the radial rib 65. The radial position of the radially outer end of the first rib 66 and the radial position of the radially outer end of the second rib 67 are, for example, the same as each other.

In the present embodiment, the second rib 67 protrudes radially outward from the outer peripheral surface of the portion of the support portion 64 located below and behind the portion where the first rib 66 is provided. The second rib 67 is disposed on the rear side of the first rib 66 so as to be separated in the circumferential direction. In the present embodiment, the circumferential position of the through portion 64c is between the circumferential position of the first rib 66 and the circumferential position of the second rib 67. In other words, the through portion 64c is provided in a portion of the support portion 64 between the portion provided with the first rib 66 and the portion provided with the second rib 67 in the circumferential direction.

As shown in fig. 4, the second rib 67 extends in the axial direction. The right end of the second rib 67 is located at the right end of the support portion 64. The end on the left side of the second rib 67 is connected to the radially inner end of one of the plurality of radial ribs 65. The radial rib 65 to which the second rib 67 is connected is a radial rib 65 different from the radial rib 65 to which the first rib 66 is connected. The radial ribs 65 to which the second ribs 67 are connected are located on the rear side of the radial ribs 65 to which the first ribs 66 are connected, and the radial ribs 65 to which the first ribs 66 are connected are arranged adjacent to each other with a space in the circumferential direction.

At least a portion of the second rib 67 is inserted inside the first coil end 33 a. In more detail, the end portion of the right side of the second rib 67 is inserted inside the first coil end 33 a. Of the two circumferential side surfaces of the second rib 67, the surface on the side facing the first rib 66 smoothly connects to the circumferential side surface of the outer groove portion 64g of the through portion 64 c. In the present embodiment, of the two circumferential side surfaces of the second rib 67, the surface on the side facing the first rib 66 is a surface that faces obliquely forward.

In the present embodiment, the housing 6 has an oil passage portion 68 and a guide portion 69. That is, the drive device 1 includes the oil passage portion 68 and the guide portion 69. In the present embodiment, the oil passage portion 68 is constituted by the through portion 64c and the second rib 67. That is, the oil passage portion 68 has the through portion 64c and the second rib 67. The oil passage portion 68 extends from the outside of the support portion 64 to the inside of the support portion 64. As shown in fig. 5, in the present embodiment, the oil passage portion 68 extends in a direction inclined with respect to the vertical direction as viewed in the axial direction of the motor shaft J1. In the present embodiment, the oil passage portion 68 extends in a direction toward the front (+ X direction) of the vehicle as it goes toward the lower side. The oil passage portion 68 has an upper opening portion 68a that opens outward and upward of the support portion 64. In the present embodiment, the edge portion of the upper opening 68a is constituted by the upper end of the through portion 64c and the upper end of the second rib 67.

The inner surface of the oil passage portion 68 includes the inner surface of the through portion 64 c. That is, the inner surface of the oil passage portion 68 has the inclined surface 64e of the outer groove portion 64 g. As shown in fig. 6, the inclined surface 64e is located on the right side as it goes radially inward from the upper opening 68 a. The inclined surface 64e approaches the first bearing 26 from the upper opening 68a toward the inside of the support portion 64. In the present embodiment, the inner surface of the oil passage portion 68 is constituted by the inner surface of the through portion 64c and the circumferential side surface of the second rib 67.

As shown in fig. 5, the guide portion 69 guides the oil O to the oil passage portion 68. The guide portion 69 is located around the upper opening portion 68 a. The guide portion 69 is provided adjacent to the front side of the upper opening portion 68a, for example. In the present embodiment, the guide portion 69 is constituted by the connecting portion 64d and the first rib 66. That is, the guide portion 69 has the connecting portion 64d and the first rib 66.

The connecting portion 64d is a portion of the outer side surface of the support portion 64 that connects the upper opening portion 68a and the first rib 66. The connection portion 64d is a peripheral edge portion of the through portion 64c in the outer surface of the support portion 64, and is a front portion of the peripheral edge portion of the through portion 64 c. The connecting portion 64d is located between the first rib 66 and the through portion 64c in the circumferential direction. In the present embodiment, the connection portion 64d is located on the lower side from the first rib 66 toward the upper opening portion 68 a. The connection portion 64d is, for example, an arc-shaped surface centered on the motor shaft J1.

As shown in fig. 7, the housing 6 has a support portion 164 and an oil passage portion 168. The support portion 164 protrudes leftward from a wall portion 61b of the wall portion of the motor housing portion 61 that covers the right side of the rotor 20 and the stator 30. The support portion 164 supports the second bearing 27. The support portion 164 has the same structure as the support portion 64 except for points that are provided at different positions and are arranged symmetrically in the axial direction, for example. The oil path portion 168 is provided in the support portion 164. The oil passage portion 168 has the same configuration as the oil passage portion 68 except for points that are provided at different positions and are arranged symmetrically in the axial direction, for example. Although not shown, the support portion 164 is provided with a guide portion for guiding the oil O to the oil passage portion 168, for example, similarly to the support portion 64.

The motor 2 of the motor 2 is an inner rotor type motor. The motor 2 has a rotor 20, a stator 30, and bearings 26 and 27. The rotor 20 is rotatable about a motor shaft J1 extending in the horizontal direction. The rotor 20 has a shaft body 21 and a rotor main body 24. Although not shown, the rotor body 24 includes a rotor core and a rotor magnet fixed to the rotor core. The torque of the rotor 20 is transmitted to the transmission device 3.

The shaft body 21 extends in the axial direction around the motor shaft J1. The shaft body 21 rotates about the motor shaft J1. The shaft body 21 is a hollow shaft body having a hollow portion 22 provided therein. The shaft body 21 is provided with a communication hole 23. The communication hole 23 extends in the radial direction to connect the hollow portion 22 and the outside of the shaft body 21.

The shaft body 21 extends across the motor housing 61 and the gear housing 62 of the housing 6. The left end of the shaft body 21 protrudes into the gear housing 62. A first gear 41 of the transmission device 3, which will be described later, is fixed to the left end of the shaft body 21. The shaft body 21 is rotatably supported by a first bearing 26 and a second bearing 27.

The stator 30 is opposed to the rotor 20 with a gap in the radial direction. In more detail, the stator 30 is located radially outside the rotor 20. The stator 30 has a stator core 32 and a coil block 31. The stator core 32 surrounds the rotor 20. The stator core 32 is fixed to the inner peripheral surface of the motor housing 61. As shown in fig. 2 and 3, the stator core 32 includes a stator core main body 32a and a fixing portion 32 b. Although not shown, the stator core main body 32a has a cylindrical core back extending in the axial direction and a plurality of teeth extending radially inward from the core back. The plurality of teeth are arranged at equal intervals along the circumferential direction over a circumference.

As shown in fig. 2, the fixing portion 32b protrudes radially outward from the outer peripheral surface of the stator core main body 32 a. The fixing portion 32b is a portion fixed to the housing 6. The plurality of fixing portions 32b are provided at intervals in the circumferential direction. For example, four fixing portions 32b are provided. The four fixing portions 32b are arranged at equal intervals along the circumferential direction.

One of the fixing portions 32b protrudes upward from the stator core main body 32 a. The other of the fixing portions 32b protrudes downward from the stator core main body 32 a. Still another one of the fixing portions 32b protrudes from the stator core main body 32a toward the front side (+ X side). The remaining one of the fixing portions 32b protrudes from the stator core main body 32a to the rear side (-X side).

The fixing portion 32b extends in the axial direction. The fixing portion 32b extends, for example, from an end portion on the left side (+ Y side) of the stator core main body 32a to an end portion on the right side (-Y side) of the stator core main body 32 a. The fixing portion 32b has a through hole 32c that penetrates the fixing portion 32b in the axial direction. Although not shown, a bolt extending in the axial direction is inserted into the through hole 32 c. The bolt is inserted through the through hole 32c from the right side (the (-Y side), for example, and screwed into a female screw hole provided in the partition wall 63. Thereby, the fixing portion 32b is fixed to the partition wall 63. Thus, the stator 30 is fixed to the housing 6 by bolts.

The coil block 31 is attached to the stator core 32. As shown in fig. 1, the coil assembly 31 has a plurality of coils 31a attached to the stator core 32 along the circumferential direction. The plurality of coils 31a are attached to the respective teeth of the stator core 32 via insulators not shown. The plurality of coils 31a are arranged along the circumferential direction. More specifically, the plurality of coils 31a are arranged at equal intervals along the circumferential direction over one circumference. Although not shown, the coil assembly 31 may have a binding member or the like for binding the coils 31a, or may have a jumper wire for connecting the coils 31a to each other.

The coil block 31 has coil ends 33 projecting from the stator core 32 in the axial direction. In the present embodiment, the coil end 33 includes a first coil end 33a and a second coil end 33 b. The first coil end 33a protrudes leftward from the stator core 32. The second coil end 33b protrudes from the stator core 32 to the right side. As shown in fig. 2, the first coil end 33a and the second coil end 33b are annular around the motor axis J1. More specifically, the first coil end 33a and the second coil end 33b are annular around the motor axis J1.

The first coil end 33a has a portion of the plurality of coils 31a that protrudes to the left side of the stator core 32. The second coil end 33b has a portion of the plurality of coils 31a that protrudes to the right side of the stator core 32. Although not shown, the first coil end 33a and the second coil end 33b may have a binding member or the like for binding the coils 31a, or may have a jumper wire for connecting the coils 31a to each other.

As shown in fig. 1, the first bearing 26 and the second bearing 27 rotatably support the rotor 20. The first bearing 26 and the second bearing 27 are, for example, ball bearings. The first bearing 26 is a bearing that rotatably supports a portion of the rotor 20 on the left side of the stator core 32. That is, the first bearing 26 rotatably supports the left side of the rotor 20. In the present embodiment, the first bearing 26 supports a portion of the shaft body 21 located on the left side of the portion to which the rotor body 24 is fixed. The first bearing 26 is held by a support portion 64 provided in the partition wall 63.

The second bearing 27 is a bearing that rotatably supports a portion of the rotor 20 located on the right side of the stator core 32. That is, the second bearing 27 rotatably supports the right side of the rotor 20. In the present embodiment, the second bearing 27 supports a portion of the shaft body 21 located on the right side of the portion to which the rotor body 24 is fixed.

The second bearing 27 is held by a support portion 164 provided on the wall portion 61 b.

The transmission device 3 is accommodated in the gear accommodating portion 62 of the housing 6. The transmission device 3 is connected to the motor 2. More specifically, the transmission device 3 is connected to the left end of the shaft body 21. The transmission device 3 has a reduction gear 4 and a differential device 5. The torque output from the motor 2 is transmitted to the differential device 5 via the reduction gear device 4.

The reduction gear 4 is connected to the motor 2. The reduction gear 4 reduces the rotation speed of the motor 2 and increases the torque output from the motor 2 in accordance with the reduction ratio. The reduction gear 4 transmits the torque output from the motor 2 to the differential device 5. The reduction gear 4 has a first gear 41, a second gear 42, a third gear 43, and an intermediate shaft body 45.

The first gear 41 is fixed to the outer peripheral surface of the left end of the shaft body 21. The first gear 41 rotates together with the shaft body 21 about the motor shaft J1. The intermediate shaft body 45 extends along an intermediate shaft J2 parallel to the motor shaft J1. The intermediate shaft body 45 rotates about the intermediate shaft J2. The second gear 42 and the third gear 43 are fixed to the outer peripheral surface of the intermediate shaft body 45. The second gear 42 and the third gear 43 are connected via an intermediate shaft body 45. The second gear 42 and the third gear 43 rotate about the intermediate shaft J2. The second gear 42 is meshed with the first gear 41. The third gear 43 meshes with a ring gear 51 of the differential device 5, which will be described later.

The torque output from the motor 2 is transmitted to the ring gear 51 of the differential device 5 via the shaft body 21, the first gear 41, the second gear 42, the intermediate shaft body 45, and the third gear 43 in this order. The gear ratio of each gear, the number of gears, and the like can be variously changed according to a required reduction ratio. In the present embodiment, the reduction gear 4 is a parallel-axis gear type reduction gear in which the axes of the gears are arranged in parallel.

The differential device 5 is connected to the motor 2 via the reduction gear 4. The differential device 5 is a device for transmitting the torque output from the motor 2 to the wheels of the vehicle. The differential device 5 transmits 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 turns. In this way, in the present embodiment, the transmission device 3 transmits the torque of the motor 2 to the axle 55 of the vehicle via the reduction gear 4 and the differential device 5. The differential device 5 includes a ring gear 51, a gear housing, a pair of pinions, a pinion shaft, and a pair of side gears. The ring gear 51 rotates about a differential shaft J3 parallel to the motor shaft J1. The torque output from the motor 2 is transmitted to the ring gear 51 via the reduction gear 4.

The motor 2 is provided with an oil passage 90 for circulating oil O inside the casing 6. The oil passage 90 is a path of the oil O that supplies the oil O from the oil sump P to the motor 2 and is guided to the oil sump P again. The oil passage 90 is provided across the inside of the motor housing 61 and the inside of the gear housing 62.

In addition, in this specification, "oil passage" refers to a path of oil. Therefore, the concept of the "oil passage" includes not only a "flow passage" for realizing a constant flow of oil in one direction but also a path for temporarily retaining the oil and a path for dropping the oil. The path for temporarily retaining the oil includes, for example, a reservoir for storing the oil.

The oil passage 90 has a first oil passage 91 and a second oil passage 92. The first oil passage 91 and the second oil passage 92 circulate oil O inside the casing 6. The first oil passage 91 has a lift path 91a, a shaft body supply path 91b, a shaft body inner path 91c, and a rotor inner path 91 d. Further, a first reservoir 93 is provided in a path of the first oil path 91. The first reservoir 93 is provided in the gear housing portion 62.

The lift path 91a is a path that lifts oil O from the oil sump P by rotation of the ring gear 51 of the differential device 5 and receives the oil O in the first reservoir 93. The first reservoir 93 opens to the upper side. The first reservoir 93 receives oil O kicked up by the ring gear 51. Further, in the case where the liquid level S of the oil sump P is high, for example, immediately after the motor 2 is driven, the first reservoir 93 receives the oil O raised by the second gear 42 and the third gear 43 in addition to the ring gear 51.

The shaft body supply path 91b guides the oil O from the first reservoir 93 to the hollow portion 22 of the shaft body 21. The inner shaft path 91c is a path through which the oil O passes in the hollow portion 22 of the shaft body 21. The inner rotor path 91d is a path through which the oil O passes from the communication hole 23 of the shaft body 21 through the inside of the rotor main body 24 and is scattered to the stator 30.

In the shaft body inner path 91c, a centrifugal force is applied to the oil O inside the rotor 20 as the rotor 20 rotates. Thereby, the oil O continuously scatters from the rotor 20 to the outside in the radial direction. Further, as the oil O is scattered, the path inside the rotor 20 becomes a negative pressure, the oil O stored in the first reservoir 93 is sucked into the rotor 20, and the path inside the rotor 20 is filled with the oil O.

The oil O reaching the stator 30 absorbs heat from the stator 30. The oil O that has cooled the stator 30 drips downward and is stored in the lower region in the motor housing 61. The oil O stored in the lower region of the motor housing 61 moves to the gear housing 62 through a partition opening 63a provided in the partition 63. As described above, the first oil passage 91 supplies the oil O to the rotor 20 and the stator 30.

In the second oil passage 92, the oil O is drawn from the oil sump P and supplied to the stator 30. Second oil passage 92 is provided with oil pump 96, cooler 97, first oil jet 11, and second oil jet 12. The second oil passage 92 has a first flow passage 92a, a second flow passage 92b, a third flow passage 92c, and an oil supply passage 94. Thus, the drive device 1 includes the oil supply passage 94.

The first flow path 92a, the second flow path 92b, and the third flow path 92c are provided in a wall portion of the housing 6. The first flow path 92a connects the oil sump P and the oil pump 96. The second flow path 92b connects the oil pump 96 and the cooler 97. The third flow path 92c connects the cooler 97 and the oil supply path 94. The third flow path 92c is provided, for example, in a front wall portion among the wall portions of the motor housing portion 61.

In the present embodiment, the oil supply passage 94 is provided in the partition wall 63. That is, the housing 6 has an oil supply passage 94. The oil supply passage 94 connects the first oil jet part 11 and the second oil jet part 12. That is, the oil supply passage 94 is connected to both the first oil squirter 11 and the second oil squirter 12. As shown in fig. 8, in the present embodiment, the oil supply passage 94 includes a first extending portion 94a, a second extending portion 94b, and a connecting portion 94 c. The first extension 94a extends upward from the end of the third flow path 92 c. The end of the third flow path 92c is located below and forward of the motor shaft J1. The first extension 94a passes through the front side of the motor shaft J1 and extends from a position below the motor shaft J1 to a position above the motor shaft J1. The first extending portion 94a extends linearly, for example, obliquely in the front-rear direction with respect to the vertical direction. The first extension 94a is located on the rear side, for example, as facing the upper side. The upper end of the first extending portion 94a is located above the shaft body 21. A connecting portion 94c is provided at an upper end of the first extending portion 94 a.

The second extension 94b is connected to an upper end of the first extension 94a via a connection portion 94 c. The second extension 94b extends rearward from the connecting portion 94 c. The second extending portion 94b extends linearly, for example, in parallel with the front-rear direction. The second extension 94b is located on the upper side than the motor shaft J1. The second extension 94b is located above the shaft body 21. The second extension 94b extends from a position forward of the motor shaft J1 to a position rearward of the motor shaft J1.

A hole portion 94d connected to the first oil squirting portion 11 and a hole portion 94e connected to the second oil squirting portion 12 are provided in a right side (-Y side) portion of the inner surface of the second extension portion 94 b. Thereby, the second extension 94b is connected to both the first oil squirting part 11 and the second oil squirting part 12. Hole 94d is located on the rear side of motor shaft J1. Hole 94e is located on the front side of motor shaft J1.

As shown in fig. 6, the hole portion 94d opens inside the motor housing portion 61. The hole portion 94d has a small-diameter hole portion 94f and a large-diameter hole portion 94 g. The small-diameter hole portion 94f opens inside the second extension portion 94 b. The large-diameter hole portion 94g is connected to the right side of the small-diameter hole portion 94 f. The large-diameter hole portion 94g opens inside the motor housing portion 61. The large-diameter hole portion 94g has an inner diameter larger than that of the small-diameter hole portion 94 f. The large diameter hole 94g is formed by, for example, a cylindrical portion 63b protruding from the partition wall 63 into the motor housing portion 61. The inside of the large-diameter hole portion 94g is the inside of the cylindrical portion 63 b. Although not shown, the hole 94e also has a small-diameter hole and a large-diameter hole, and opens into the motor housing 61, similarly to the hole 94 d.

As shown in fig. 8, the flow passage area of the first extension portion 94a and the flow passage area of the second extension portion 94b are, for example, the same as each other. The flow passage area of the connecting portion 94c is larger than the flow passage area of the first extending portion 94a and the flow passage area of the second extending portion 94 b. The oil O in the third flow path 92c flows into the lower end of the first extension 94 a. The oil O flowing into the first extension 94a flows upward along the first extension 94a and flows into the second extension 94b via the connection portion 94 c. The oil O flowing into the second extension 94b flows rearward and flows into the first oil jet part 11 and the second oil jet part 12 through the holes 94d and 94 e. The hole 94d and the first oil squirting component 11 are located on the downstream side of the hole 94e and the second oil squirting component 12 in the flow direction of the oil O in the second extension 94 b.

As shown in fig. 1, the first oil squirter 11 and the second oil squirter 12 are housed inside the housing 6. As shown in fig. 2, in the present embodiment, the first oil squirting part 11 and the second oil squirting part 12 are pipes extending in the axial direction. The first oil squirter 11 and the second oil squirter 12 are, for example, cylindrical shapes extending linearly in the axial direction.

In the present specification, the phrase "the first oil squirting part and the second oil squirting part extend linearly in the axial direction of the motor shaft" includes not only a case where the first oil squirting part and the second oil squirting part extend strictly linearly in the axial direction, but also a case where the first oil squirting part and the second oil squirting part extend substantially linearly in the axial direction. That is, in the present embodiment, as for "the first oil squirting part 11 and the second oil squirting part 12 extend linearly in the axial direction", for example, the first oil squirting part 11 and the second oil squirting part 12 may extend slightly obliquely with respect to the axial direction. In this case, the direction in which the first oil squirting part 11 is inclined with respect to the axial direction and the direction in which the second oil squirting part 12 is inclined with respect to the axial direction may be the same or different.

In the present embodiment, the first oil squirting part 11 and the second oil squirting part 12 extend in parallel directions with each other. The first oil squirting part 11 and the second oil squirting part 12 are arranged at intervals in the circumferential direction on the radially outer side of the stator 30. In the present embodiment, the first oil squirting component 11 and the second oil squirting component 12 are positioned above the stator 30 in the vertical direction.

Further, in the present specification, "an object is located on a predetermined direction side of another object" includes the following cases: when a certain object and another object are viewed from a predetermined direction side in a state where the driving device is disposed on a horizontal plane, the certain object and the another object overlap each other, and the certain object is located on a front side of the another object. That is, as shown in fig. 3, in the present embodiment, when the first oil squirting part 11, the second oil squirting part 12, and the stator 30 are viewed from the upper side in the vertical direction in a state in which the drive device 1 is disposed on a horizontal plane, the first oil squirting part 11, the second oil squirting part 12, and the stator 30 overlap each other, and the first oil squirting part 11 and the second oil squirting part 12 are located on the front side of the stator 30. In the present specification, the phrase "a state in which the driving device is disposed on a horizontal plane" includes a case in which a vehicle mounted with the driving device is disposed on a horizontal road surface.

In the present embodiment, the first oil ejecting portion 11 and the second oil ejecting portion 12 are disposed so as to sandwich the motor shaft J1 as viewed in the vertical direction. The first oil jet 11 is located on the rear side of the motor shaft J1. The second oil jet portion 12 is located on the front side of the motor shaft J1. The first oil squirter 11 and the second oil squirter 12 are disposed, for example, with a fixing portion 32b protruding upward from the stator core body 32a interposed therebetween in the front-rear direction and the circumferential direction.

As shown in fig. 5, the vertical position of the first oil squirting component 11 and the vertical position of the second oil squirting component 12 are, for example, the same as each other. The radial position of the first oil squirt 11 and the radial position of the second oil squirt 12 are, for example, the same as each other. In the present embodiment, the first oil squirting part 11 and the second oil squirting part 12 are disposed so as to sandwich the center line CL as viewed in the axial direction. The center line CL is an imaginary line that passes through the motor shaft J1 and extends in the vertical direction as viewed in the axial direction. The center line CL extends parallel to the vertical direction. The first oil squirting part 11 and the second oil squirting part 12 are arranged line-symmetrically with respect to the center line CL as viewed in the axial direction.

As shown in fig. 2, the left end of the first oil squirting part 11 and the left end of the second oil squirting part 12 are open. The right end of the first oil squirting part 11 and the right end of the second oil squirting part 12 are closed. As shown in fig. 3, the dimension in the axial direction of the second oil squirting part 12 is, for example, larger than the dimension in the axial direction of the first oil squirting part 11. The axial position of the left end of the first oil squirt 11 and the axial position of the left end of the second oil squirt 12 are, for example, the same as each other. The right end of the second oil squirter 12 is located, for example, on the right side of the right end of the first oil squirter 11.

As shown in fig. 1, the left end of the first oil squirting component 11 and the left end of the second oil squirting component 12 are fixed to the partition wall 63. As shown in fig. 6, the left end of the first oil squirt part 11 is fixed to the partition wall 63 by, for example, being inserted into a hole 94d provided in the partition wall 63. More specifically, the left end of the first oil ejecting portion 11 is inserted into the large-diameter hole 94g inside the cylindrical portion 63 b. The left end of the second oil squirting component 12 is fixed to the partition wall 63 by, for example, being inserted into a hole 94e provided in the partition wall 63. The right end of the first oil ejecting portion 11 and the right end of the second oil ejecting portion 12 are fixed to the wall portion 61c located on the upper side among the wall portions of the motor housing portion 61, for example, via mounting portions not shown. Thus, the first oil squirting part 11 and the second oil squirting part 12 are fixed to the housing 6.

Here, the hole 94e is located on the upstream side of the hole 94d in the flow direction of the oil O in the second extension 94b of the oil supply passage 94. Thus, the portion of the oil supply passage 94 that connects the second oil jet 12 is located upstream of the portion of the oil supply passage 94 that connects the first oil jet 11 in the flow direction of the oil O in the oil supply passage 94.

In the present embodiment, the inner diameter of the first oil squirting part 11 and the inner diameter of the second oil squirting part 12 are the same as each other. That is, the flow passage area of the first oil squirting part 11 and the flow passage area of the second oil squirting part 12 are the same as each other. In the present embodiment, the flow passage area of the first oil squirting component 11 is the area inside the first oil squirting component 11 in the cross section perpendicular to the axial direction. In the present embodiment, the flow passage area of the second oil squirting component 12 is the area inside the second oil squirting component 12 in a cross section perpendicular to the axial direction.

In the present specification, "certain parameters are identical to each other" includes the case where certain parameters are substantially identical to each other, except that certain parameters are strictly identical to each other. That is, for example, "the flow passage area of the first oil squirter 11 and the flow passage area of the second oil squirter 12 are the same as each other" also includes a case where the flow passage area of the first oil squirter 11 and the flow passage area of the second oil squirter 12 are substantially the same as each other. "certain parameters are substantially the same as each other" includes, for example, a case where certain parameters are slightly deviated from each other within the range of tolerance.

As shown in fig. 5, in the present embodiment, the first oil squirting part 11 is disposed inside the recess 61d provided in the wall part 61 c. The second oil ejecting portion 12 is disposed inside the recess 61e provided in the wall portion 61 c. The recess 61d and the recess 61e are recessed upward. The recess 61d and the recess 61e are arranged apart in the front-rear direction. Each oil ejecting portion is disposed inside each recess, and a partition portion 61f that is a part of the wall portion 61c is provided between the first oil ejecting portion 11 and the second oil ejecting portion 12 in the front-rear direction. The first oil jet 11 is disposed apart from the inner surface of the recess 61 d. The second oil jet portion 12 is disposed apart from the inner surface of the recess 61 e.

As shown in fig. 3, the first oil squirter 11 has the ejection ports 13a, 14a and the first supply port 15 a. The second oil jet portion 12 has jet ports 13b, 14b and a second supply port 15 b. The injection ports 13a and 14a and the first supply port 15a are provided on the outer surface of the first oil jet part 11. The injection ports 13b and 14b and the second supply port 15b are provided on the outer surface of the second oil jet part 12. Each injection port and each supply port are circular, for example.

The oil O supplied from the oil supply passage 94 to the inside of the first oil jet part 11 and the inside of the second oil jet part 12 is jetted from each jet port and each supply port provided in the first oil jet part 11 and the second oil jet part 12. The injection ports 13a, 13b, 14a, 14b inject oil O to the stator 30. The first supply port 15a supplies the oil O to the first bearing 26. The second supply port 15b supplies the oil O to the second bearing 27.

The first oil ejecting portion 11 is not provided with a supply port for supplying the oil O to the second bearing 27. The second oil jet portion 12 is not provided with a supply port for supplying the oil O to the first bearing 26. That is, of the first oil jet part 11 and the second oil jet part 12, only the first oil jet part 11 has a supply port for supplying the oil O to the first bearing 26. In addition, of the first oil jet part 11 and the second oil jet part 12, only the second oil jet part 12 has a supply port for supplying the oil O to the second bearing 27.

In the present embodiment, each of the injection ports and each of the supply ports provided in the first oil squirting part 11 and the second oil squirting part 12 is an opening part that opens on the outer surface of each oil squirting part, among the opening parts of the through-holes that penetrate the wall part of each oil squirting part from the inner surface to the outer surface.

Specifically, as shown in fig. 5, the first supply port 15a is an opening portion that opens on the outer side surface of the first oil squirt part 11, among opening portions of the first through hole 16a that penetrates the wall portion of the first oil squirt part 11 from the inner side surface to the outer side surface. Thus, the first oil squirting part 11 has the first through hole 16 a. As shown in fig. 7, the second supply port 15b is an opening portion that opens on the outer side surface of the second oil squirt part 12, among opening portions of the second through hole 16b that penetrate the wall portion of the second oil squirt part 12 from the inner side surface to the outer side surface. Thus, the second oil ejecting portion 12 has the second through hole 16 b. By forming the first through-hole 16a and the second through-hole 16b, the first supply port 15a and the second supply port 15b can be easily formed. The first through hole 16a extends in a radial direction around the central axis of the first oil ejecting part 11. The second through hole 16b extends in a radial direction around the central axis of the second oil ejecting portion 12.

As shown in fig. 6, the axial position of the first through hole 16a is the same as the axial position of a part of the first bearing 26. The axial position of the first through hole 16a is, for example, the same as the axial position of the left end of the first bearing 26. As shown in fig. 7, the second through hole 16b is located on the left side of the second bearing 27. As shown in fig. 6 and 7, the opening area of the opening 17a of the opening of the first through hole 16a that opens to the inner surface of the first oil squirt part 11 and the opening area of the opening 17b of the opening of the second through hole 16b that opens to the inner surface of the second oil squirt part 12 are, for example, the same.

As shown in fig. 7, the inner surface of the second through hole 16b has an extended surface 16c and an inclined surface 16 d. In the present embodiment, the extended surface 16c and the inclined surface 16d are right portions of the inner surface of the second through hole 16 b. That is, the extended surface 16c and the inclined surface 16d face leftward.

The extension surface 16c extends from the inner surface of the second oil jet part 12 in a second direction D2 orthogonal to the axial direction. In the present embodiment, the second direction D2 is a direction inclined in the front-rear direction with respect to the vertical direction. The extension surface 16c extends obliquely rearward from the inner surface of the second oil squirt part 12 toward the lower side, for example. That is, the second direction D2 is a direction toward the rear side as it goes toward the lower side. The extension surface 16c is, for example, a curved surface.

In the present embodiment, the inclined surface 16d of the second through hole 16b extends from the tip of the extending surface 16c of the second through hole 16b to the outer surface of the second oil ejecting portion 12. In the present embodiment, the front end of the extended surface 16c is the end below the extended surface 16 c. The inclined surface 16D extends in a direction inclined to the axial direction with respect to the second direction D2. The inclined surface 16D is located on the right side as it faces the outer side surface of the second oil squirting component 12 in the second direction D2. Here, the second through hole 16b is located on the left side of the second bearing 27. Therefore, the inclined surface 16d approaches the second bearing 27 as it goes toward the outer side surface of the second oil squirting component 12. The inclined surface 16d is, for example, a curved surface. The inclined surface 16d is, for example, a part of a tapered surface whose inner diameter increases as it goes toward the outer surface of the second oil ejecting part 12.

As shown in fig. 9, the maximum width of the inclined surface 16D is, for example, equal to or less than the maximum width of the extended surface 16c in the third direction D3 perpendicular to both the axial direction and the second direction D2. In the present embodiment, the maximum width of the inclined surface 16d and the maximum width of the extended surface 16c are the same as each other. The maximum width of the inclined surface 16D in the third direction D3 is, for example, the same as the inner diameter of the opening 17b of the opening of the second through hole 16b that opens on the inner surface of the second oil ejecting portion 12. In the right portion of the inclined surface 16D, the width of the inclined surface 16D in the third direction D3 becomes smaller toward the right. The outer edge of the right portion of the inclined surface 16D is formed in an arc shape convex to the right as viewed in the second direction D2.

As shown in fig. 3, the injection ports 13a and 13b are located above the stator core 32. More specifically, the injection port 13a and the injection port 13b are located above the stator core main body 32 a. The injection ports 13a and 13b are disposed symmetrically with respect to the motor shaft J1 as viewed in the vertical direction. The oil O injected from the injection ports 13a and 13b is supplied to the stator core 32. The plurality of injection ports 13a and 13b are provided at intervals in the axial direction. For example, four ejection ports 13a and 13b are provided. The opening area of the ejection opening 13a and the opening area of the ejection opening 13b are, for example, the same as each other.

The ejection port 14a and the ejection port 14b are located above the coil end 33. The ejection ports 14a and 14b are provided in two numbers, respectively. One of the two injection ports 14a is located on the left side of the plurality of injection ports 13a in the first oil squirting part 11 and located above the first coil end 33 a. The other of the two injection ports 14a is located on the right side of the plurality of injection ports 13a in the first oil squirting part 11 and above the second coil end 33 b. One of the two injection ports 14b is located on the left side of the plurality of injection ports 13b in the second oil squirting part 12 and is located above the first coil end 33 a. The other of the two injection ports 14b is located on the right side of the plurality of injection ports 13b in the second oil squirting part 12 and above the second coil end 33 b.

The injection port 14a and the injection port 14b located above the first coil end 33a are symmetrically arranged with respect to the motor axis J1 as viewed in the vertical direction. The injection ports 14a and 14b located above the second coil end 33b are symmetrically arranged with respect to the motor axis J1 as viewed in the vertical direction. The oil O injected from the injection ports 14a and 14b is supplied to each coil end 33. The opening area of the ejection opening 14a and the opening area of the ejection opening 14b are, for example, the same as each other. The opening areas of the ejection openings 14a, 14b and the opening areas of the ejection openings 13a, 13b are, for example, the same as each other.

In the first oil jet portion 11, the first supply port 15a is located on the left side of the jet port 14a located above the first coil end 33 a. That is, the first supply port 15a is located on the left side of the ejection ports 13a and 14 a. The axial distance from the left end of the first oil squirting part 11 connected to the oil supply passage 94 to the first supply port 15a is smaller than the axial distance from the left end of the first oil squirting part 11 to the injection ports 13a, 14 a. Thus, the first supply port 15a is located on the upstream side of the injection ports 13a, 14a in the flow direction of the oil O flowing in the first oil jet part 11.

The first supply port 15a is provided at, for example, the left end of the first oil jet 11. The first supply port 15a is located on the left side of the first coil end 33 a. In the present embodiment, the first supply port 15a is located above the first bearing 26. As shown in fig. 5, in the present embodiment, the first supply port 15a opens in a direction inclined in the front-rear direction with respect to the vertical direction as viewed in the axial direction. More specifically, the first supply port 15a opens diagonally forward to the lower side. The first supply port 15a is opened, for example, substantially toward the motor shaft J1, i.e., radially inward. In addition, in the present specification, the "orientation of the supply port opening" includes an orientation along a normal line passing through the center of the supply port and perpendicular with respect to the center of the supply port. In addition, in the present specification, the "orientation of the ejection port opening" includes an orientation along a normal line passing through the center of the ejection port and perpendicular with respect to the center of the ejection port.

The first supply port 15a opens toward the guide portion 69. In the present embodiment, the first supply port 15a opens toward the connection portion 64 d. That is, the first supply port 15a opens to a part of the outer surface of the support portion 64. The first supply port 15a overlaps the oil passage portion 68 as viewed in the vertical direction. The first supply port 15a is located above the upper opening portion 68 a. In the present embodiment, the first supply port 15a is located above the second rib 67. More specifically, the first supply port 15a is located above a circumferential side surface of the second rib 67 that constitutes a part of the inner side surface of the oil passage portion 68. The opening area of the first supply port 15a is, for example, the same as the opening areas of the ejection ports 13a, 13b, 14a, and 14 b.

As shown in fig. 6, a part of the first supply port 15a is covered by a cylindrical portion 63b into which the left end of the first oil squirting component 11 is inserted. In the present embodiment, the left end of the first supply port 15a is covered by the right end of the cylindrical portion 63 b. That is, in the present embodiment, the right end of the cylindrical portion 63b is a covering portion 63c that covers a part of the first supply port 15 a. As described above, in the present embodiment, the housing 6 has the covering portion 63 c. The covering portion 63c covers a part of the first supply port 15a with the inner surface. The inner surface of the covering portion 63c is the inner surface of the large-diameter hole portion 94 g. In the present embodiment, the covering portion 63c closes a part of the first supply port 15 a.

As shown in fig. 5, the oil O injected from the first supply port 15a is blown to the guide portion 69 and guided to the oil passage portion 68 by the guide portion 69. Thereby, the oil O guided to the oil passage portion 68 flows to the inside of the support portion 64 via the oil passage portion 68. Thereby, the oil O injected from the first supply port 15a to the outer side surface of the support portion 64 is supplied to the first bearing 26 disposed inside the support portion 64.

As shown in fig. 3, in the second oil squirting part 12, the second supply port 15b is located on the right side of the ejection port 14b located above the second coil end 33 b. The second supply port 15b is provided at, for example, the right end of the second oil jet part 12. The second supply port 15b is located on the right side of the second coil end 33 b. In the present embodiment, the second supply port 15b is located slightly to the left of the second bearing 27. The axial position of the second supply port 15b is between the axial position of the second coil end 33b and the axial position of the second bearing 27.

The axial distance from the left end of the second oil squirting part 12 connected to the oil supply passage 94 to the second supply port 15b is greater than the axial distance from the left end of the first oil squirting part 11 connected to the oil supply passage 94 to the first supply port 15 a. In the present embodiment, the axial distance from the left end of the second oil squirting part 12 connected to the oil supply passage 94 to the second supply port 15b is the flow path length from the oil supply passage 94 to the second supply port 15 b. In the present embodiment, the axial distance from the left end of the first oil squirting component 11 connected to the oil supply passage 94 to the first supply port 15a is the flow path length from the oil supply passage 94 to the first supply port 15 a. That is, the flow path length from the oil supply passage 94 to the second supply port 15b is longer than the flow path length from the oil supply passage 94 to the first supply port 15 a.

Although not shown, in the present embodiment, the second supply port 15b opens in a direction inclined in the front-rear direction with respect to the vertical direction as viewed in the axial direction. More specifically, the second supply port 15b opens diagonally rearward in the downward direction. The second supply port 15b is opened, for example, substantially toward the motor shaft J1, i.e., radially inward. As shown in fig. 7, the inclined surface 16d is provided, so that the opening area of the second supply port 15b is larger than the opening area of the opening 17 b. In the present embodiment, the opening area of the second supply port 15b is larger than the opening area of the first supply port 15 a.

The oil O injected from the second supply port 15b is injected along the inclined surface 16d in a direction inclined to the right and the rear with respect to the direction directed directly downward. The oil O injected from the second supply port 15b flows to the inside of the support portion 164 via the oil passage portion 168. Thereby, the oil O injected from the second supply port 15b is supplied to the second bearing 27 disposed inside the support portion 164.

As described above, the first oil squirting part 11 and the second oil squirting part 12 squirt the oil O as the refrigerant to the stator 30 through the respective ejection ports. Thereby, the oil O can be supplied from the first oil jet part 11 and the second oil jet part 12 to the stator 30, and the stator 30 can be cooled. More specifically, the oil O can be supplied from the first oil squirting part 11 and the second oil squirting part 12 to the stator core 32, the first coil end 33a, and the second coil end 33b, and the stator core 32, the first coil end 33a, and the second coil end 33b can be cooled. The first oil jet 11 supplies the oil O to the first bearing 26 via the first supply port 15a, and the second oil jet 12 supplies the oil O to the second bearing 27 via the second supply port 15 b. This allows the oil O to be supplied as lubricating oil to the first bearing 26 and the second bearing 27.

The oil O supplied from the first oil jet part 11 and the second oil jet part 12 to the stator 30 drops downward and is stored in a lower region in the motor housing part 61. The oil O supplied to the first bearing 26 and the second bearing 27 may drip downward and be accumulated in a lower region in the motor housing 61. The oil O stored in the lower region of the motor housing 61 moves to the oil sump P of the gear housing 62 through the partition wall opening 63a provided in the partition wall 63. As described above, the second oil passage 92 supplies the oil O to the stator 30, the first bearing 26, and the second bearing 27.

The oil pump 96 shown in fig. 1 is a pump that conveys oil O as a refrigerant. In the present embodiment, the oil pump 96 is an electric pump driven by electric power. The oil pump 96 draws oil O from the oil sump P through the first flow path 92a, and supplies the oil O to the motor 2 through the second flow path 92b, the cooler 97, the third flow path 92c, the oil supply path 94, and the oil squirters of the first oil squirter 11 and the second oil squirter 12.

Cooler 97 shown in fig. 1 cools oil O passing through second oil passage 92. The cooler 97 is connected to the second flow path 92b and the third flow path 92 c. The second flow path 92b and the third flow path 92c are connected to each other via an internal flow path of the cooler 97. A cooling water pipe 98 through which cooling water cooled by a radiator, not shown, passes is connected to the cooler 97. The oil O passing through the cooler 97 is cooled by heat exchange with the cooling water passing through the cooling water pipe 98.

According to the present embodiment, the first oil jet 11 has the first supply port 15a for supplying the oil O to the first bearing 26, and the second oil jet 12 has the second supply port 15b for supplying the oil O to the second bearing 27. That is, a supply port for supplying the oil O to the first bearing 26 and a supply port for supplying the oil O to the second bearing 27 are provided in different oil ejecting portions. Therefore, the number of openings provided in the first oil ejecting portion 11 can be reduced as compared with the case where both the supply port for supplying the oil O to the first bearing 26 and the supply port for supplying the oil O to the second bearing 27 are provided in the first oil ejecting portion 11. In addition, the number of openings provided in the second oil ejecting portion 12 can be reduced as compared with the case where both the supply port for supplying the oil O to the first bearing 26 and the supply port for supplying the oil O to the second bearing 27 are provided in the second oil ejecting portion 12. This can suppress a decrease in the pressure in the first oil jet part 11 and the pressure in the second oil jet part 12. Therefore, the oil O can be supplied to the first bearing 26 and the second bearing 27 by the respective oil ejecting portions, and the potential of the oil O ejected from the ejection ports 13a, 13b, 14a, and 14b to the stator 30 can be suppressed from decreasing.

In addition, according to the present embodiment, the portion of the oil supply passage 94 that connects the second oil squirting part 12 is located on the upstream side in the flow direction of the oil O in the oil supply passage 94 than the portion of the oil supply passage 94 that connects the first oil squirting part 11. The flow path length from the oil supply passage 94 to the second supply port 15b is longer than the flow path length from the oil supply passage 94 to the first supply port 15 a. Therefore, the oil O flowing into the first oil jet part 11 after delaying the oil O flowing from the oil supply passage 94 into the second oil jet part 12 can be injected from the first supply port 15a located closer to the oil supply passage 94. Further, the oil O flowing into the second oil jet part 12 earlier than the oil O flowing into the first oil jet part 11 from the oil supply passage 94 can be injected from the second supply port 15b located farther from the oil supply passage 94. This makes it easy to make the path length of the oil O from the inside of the inflow oil supply passage 94 to the first supply port 15a and the path length of the oil O from the inside of the inflow oil supply passage 94 to the second supply port 15b approximately equal. Therefore, the potential of the oil O injected from the first supply port 15a and the potential of the oil O injected from the second supply port 15b are easily made to be the same. Therefore, the oil O is easily supplied to each bearing uniformly.

In addition, according to the present embodiment, the opening area of the opening portion 17a of the opening portion of the first through hole 16a that opens to the inner side surface of the first oil squirt part 11 and the opening area of the opening portion 17b of the opening portion of the second through hole 16b that opens to the inner side surface of the second oil squirt part 12 are the same as each other. Therefore, the amount of the oil O per unit time flowing from the inside of the first oil squirting component 11 into the first through hole 16a and the amount of the oil O per unit time flowing from the inside of the second oil squirting component 12 into the second through hole 16b can be made to be the same. This makes it possible to make the amount of oil O injected from the first supply port 15a per unit time and the amount of oil O injected from the second supply port 15b per unit time the same. Therefore, the oil O is easily supplied more uniformly to the bearings.

Further, according to the present embodiment, the inner surface of the second through hole 16b has the inclined surface 16d which is closer to the second bearing 27 as it goes toward the outer surface of the second oil ejecting portion 12. Therefore, for example, even when the second supply port 15b is disposed at a position axially separated from the second bearing 27 due to restrictions on the disposition of the second oil ejecting portion 12 in the housing 6, the oil O ejected from the second supply port 15b is likely to be splashed toward the second bearing 27 along the inclined surface 16 d. Thus, even when the second supply port 15b is disposed at a position axially separated from the second bearing 27, the oil O can be supplied from the second supply port 15b to the second bearing 27.

Further, according to the present embodiment, the extension surface 16c extending from the inner surface of the second oil ejecting portion 12 in the second direction D2 is provided, and the inclined surface 16D extends from the distal end of the extension surface 16c to the outer surface of the second oil ejecting portion 12. Therefore, the wall portion of the second oil squirting component 12 can be prevented from being thinned at the edge of the opening 17b of the second through hole 16b, as compared to the case where the inclined surface 16d extends from the inner surface of the second oil squirting component 12 to the outer surface of the second oil squirting component 12. This can increase the strength of the edge of the opening 17b, and can prevent damage to the edge of the opening 17 b. Therefore, variation in the amount of the oil O flowing from the inside of the second oil ejecting portion 12 into the second through hole 16b can be suppressed. Therefore, variation in the amount of oil O supplied from the second supply port 15b to the second bearing 27 can be suppressed. In addition, the edge of the opening 17b can be prevented from being partially damaged and separated. Therefore, the foreign matter can be suppressed from being mixed into the oil O.

In addition, according to the present embodiment, the maximum width of the inclined surface 16D is equal to or less than the maximum width of the extended surface 16c in the third direction D3. Therefore, compared to the case where the maximum width of the inclined surface 16D is larger than the maximum width of the extended surface 16c, the oil O injected from the extended surface 16c along the inclined surface 16D can be suppressed from scattering in the third direction D3 on the inclined surface 16D. This makes it easy to splash the oil O injected from the second supply port 15b along the inclined surface 16d in the direction in which the inclined surface 16d extends. Therefore, the oil O injected from the second supply port 15b is more easily supplied to the second bearing 27.

In addition, according to the present embodiment, the flow passage area of the first oil squirting part 11 and the flow passage area of the second oil squirting part 12 are the same as each other. Therefore, the pressure of the oil O flowing through the first oil jet 11 and the pressure of the oil O flowing through the second oil jet 12 are easily made to be the same. This makes it easier to equalize the momentum of the oil O injected from the first supply port 15a and the momentum of the oil O injected from the second supply port 15 b. Therefore, the oil O is easily supplied more uniformly to the bearings.

In addition, according to the present embodiment, the first oil squirting part 11 and the second oil squirting part 12 are pipes. Therefore, the first oil squirting part 11 and the second oil squirting part 12 can be easily manufactured, compared to a case where, for example, holes are provided in the wall portion of the housing 6 to manufacture the first oil squirting part 11 and the second oil squirting part 12. In addition, the first oil squirting part 11 and the second oil squirting part 12 are also easily removed from the housing 6 and replaced.

Further, according to the present embodiment, the first supply port 15a opens toward the guide portion 69 located around the upper opening portion 68a of the oil passage portion 68. Here, when the temperature of the oil O is high, the viscosity of the oil O becomes low, and the flow velocity of the oil O tends to increase. Therefore, the momentum of the oil O injected from the first supply port 15a easily becomes sufficiently large. In this case, as shown by the solid line in fig. 5, the oil O injected from the first supply port 15a is injected in the direction in which the first supply port 15a is open, and is blown onto the guide portion 69. This allows the potential of the injected oil O to be reduced by the guide portion 69, and then the oil O can be guided to the oil passage portion 68 through the guide portion 69. Therefore, the oil O injected from the first supply port 15a with sufficient momentum can be prevented from being directly blown to the oil passage portion 68. Therefore, the oil O can be prevented from splashing on the inner surface of the oil passage portion 68 and scattering to the outside of the oil passage portion 68. This can suppress a decrease in the amount of oil O supplied to the first bearing 26 via the oil passage portion 68.

Further, when the temperature of the oil O is low, the viscosity of the oil O becomes high, and the flow velocity of the oil O tends to be small. Therefore, the momentum of the oil O injected from the first supply port 15a tends to be insufficient. In this case, as shown by a broken line in fig. 5, the oil O is likely to drop from the first supply port 15a directly below in the vertical direction. In contrast, according to the present embodiment, the first supply port 15a is positioned above the upper opening portion 68a in the vertical direction. Therefore, the oil O dropped from the first supply port 15a directly below in the vertical direction can be supplied to the oil passage portion 68 from the upper opening portion 68 a. When the oil O drops from the first supply port 15a directly below the vertical direction, the momentum of the oil O is very small, and therefore even if the oil O is directly supplied to the oil passage portion 68, the oil O is less likely to splash on the inner surface of the oil passage portion 68. This can suppress a decrease in the amount of the oil O supplied to the first bearing 26 via the oil passage portion 68. Further, even if the temperature of the oil O is low and the flow velocity of the oil O is low, the oil O can be directly supplied to the oil passage portion 68, and therefore, the time for supplying the oil O from the first supply port 15a to the first bearing 26 is easily shortened. This can prevent the supply of the oil O to the first bearing 26 from becoming slow even when the temperature of the oil O is low.

Further, according to the present embodiment, the oil passage portion 68 has the inclined surface 64e that approaches the first bearing 26 as going from the upper opening portion 68a toward the inside of the support portion 64. Therefore, the oil O supplied to the oil passage portion 68 is easily guided to the first bearing 26 along the inclined surface 64 e. Thereby, the oil O can be appropriately supplied to the first bearing 26.

Further, according to the present embodiment, the guide portion 69 has the first rib 66 protruding radially outward from the outer side surface of the support portion 64. Therefore, by blocking the flow of the oil O with the first rib 66, the oil O can be easily guided to the oil passage portion 68. In the present embodiment, the guide portion 69 has a connecting portion 64d connecting the upper opening portion 68a and the first rib 66 in the outer side surface of the support portion 64, and the first supply port 15a opens toward the connecting portion 64 d. Therefore, as shown by the solid line in fig. 5, the oil O injected to the connection portion 64d can be blocked by the first rib 66 from flowing to the side opposite to the upper opening portion 68 a. This makes it possible to easily guide the oil O injected into the connecting portion 64d to the upper opening portion 68 a. Therefore, the oil O can be appropriately guided to the oil passage portion 68 by the guide portion 69. Therefore, the oil O can be appropriately supplied to the first bearing 26 via the oil passage portion 68.

Further, according to the present embodiment, the connection portion 64d is positioned on the lower side in the vertical direction from the first rib 66 toward the upper opening portion 68 a. Therefore, the oil O injected to the connection portion 64d is easily caused to flow along the connection portion 64d toward the upper opening portion 68a by gravity. Thus, the oil O can be guided to the oil passage portion 68 more appropriately by the guide portion 69. Therefore, the oil O can be supplied to the first bearing 26 more appropriately through the oil passage portion 68.

Further, according to the present embodiment, the oil passage portion 68 includes the through portion 64c and the second rib 67 protruding radially outward from the peripheral edge portion of the through portion 64 c. Therefore, when the through portion 64c is inclined with respect to the vertical direction as in the present embodiment, the second rib 67 can enlarge the upper opening portion 68a in the direction orthogonal to the vertical direction. Specifically, in the present embodiment, the second rib 67 projects obliquely rearward from the outer side surface of the support portion 64 toward the upper side, and can enlarge the upper opening portion 68a toward the rear side. Therefore, when the oil O drops from the first supply port 15a directly below in the vertical direction due to, for example, a low temperature of the oil O, the oil O is easily received through the upper opening portion 68 a. Therefore, the oil O dropped from the first supply port 15a is easily caused to flow into the oil passage portion 68. Therefore, the oil O can be supplied to the first bearing 26 more appropriately through the oil passage portion 68.

In addition, according to the present embodiment, the housing 6 has the support portion 64 and the covering portion 63c that covers a part of the first supply port 15 a. Therefore, as shown in fig. 6, a part of the oil O injected from the first supply port 15a can be made to follow the inner wall surface of the casing 6 from the coating portion 63 c. This allows the oil O to be guided to the oil passage portion 68 along the inner wall surface of the housing 6. In the present embodiment, a part of the oil O injected from the first supply port 15a flows from the coating portion 63c into the oil passage portion 68 from the upper opening portion 68a along the wall surface of the partition wall 63. Therefore, the oil O can be supplied to the oil passage portion 68 more appropriately. Therefore, the oil O can be supplied to the first bearing 26 more appropriately through the oil passage portion 68.

Further, according to the present embodiment, the oil passage portion 68 extends in a direction inclined with respect to the vertical direction as viewed in the axial direction of the motor shaft J1. Therefore, for example, by providing the second ribs 67 as described above, the upper opening portion 68a can be easily enlarged in the direction orthogonal to the vertical direction. In the present embodiment, the oil passage portion 68 extends in a direction toward the front of the vehicle as it goes toward the vertically lower side. Therefore, when the vehicle travels downhill, the entire drive device 1 is inclined, and the direction in which the oil passage portion 68 extends approaches the vertical direction. Thus, the oil O flowing into the oil passage portion 68 from the upper opening portion 68a easily flows toward the inside of the support portion 64 in the oil passage portion 68, and the oil O can be more easily supplied to the first bearing 26 via the oil passage portion 68. Particularly, when the vehicle travels downhill, the speed of the vehicle tends to increase, and the rotation speed of the rotor 20 also tends to increase. Therefore, the oil O can be easily supplied to the first bearing 26, and the rotor 20 rotating at a high speed can be appropriately supported by the first bearing 26.

Further, according to the present embodiment, the first supply port 15a is located on the upstream side of the injection ports 13a, 14a in the flow direction of the oil O flowing in the first oil jet portion 11. Therefore, the flow path length from the oil supply passage 94 to the first supply port 15a becomes short, and the potential of the oil O injected from the first supply port 15a tends to be strong. Even in such a case, according to the present embodiment, as described above, since the oil O is received by the guide portion 69 and then guided to the oil passage portion 68, the oil O can be prevented from splashing in the oil passage portion 68. In this way, the effect of suppressing the splashing of the oil O is more effectively obtained in the structure in which the first supply port 15a is located on the upstream side of the injection ports 13a and 14 a.

< second embodiment >

As shown in fig. 10 and 11, the first oil squirting part 211 and the second oil squirting part 212 of the present embodiment are tubes as in the first embodiment. As shown in fig. 10, in the first oil squirting part 211, the first supply port 215a is located on the right side of the first bearing 26. The first supply port 215a is an opening portion that opens on the outer side surface of the first oil squirt part 211, among opening portions of the first through hole 216a that penetrates the wall portion of the first oil squirt part 211 from the inner side surface to the outer side surface.

In the present embodiment, the first through hole 216a is located on the upstream side in the flow direction of the oil O in the first oil ejecting portion 211 from the inner side surface toward the outer side surface of the first oil ejecting portion 211. That is, the first through hole 216a is located on the left side from the inner surface toward the outer surface of the first oil ejecting portion 211. Accordingly, the inner surface of the first through hole 216a has an inclined surface that approaches the first bearing 26 as it goes toward the outer surface of the first oil ejecting portion 211. In the present embodiment, the entire inner surface of the first through hole 216a is the inclined surface. Since the first through hole 216a has such an inclined surface, even if the first supply port 215a is disposed apart from the first bearing 26 in the axial direction, the oil O can be ejected toward the first bearing 26 as shown in fig. 10. This makes it easy to supply the oil O injected from the first supply port 215a to the first bearing 26.

In the present embodiment, first oil squirting portion 211 has a protrusion 218 provided on the inner surface of first oil squirting portion 211. The protrusion 218 is located on the inner surface of the first oil ejecting portion 211 at a portion on the downstream side in the flow direction of the oil O in the first oil ejecting portion 211, in the peripheral edge portion of the first through hole 216 a. The surface of the protrusion 218 on the upstream side in the flow direction of the oil O in the first oil ejecting portion 211 is a vertical surface 218a orthogonal to the axial direction. In the present embodiment, the vertical surface 218a is a surface on the left side of the protrusion 218. The surface of the protrusion 218 on the downstream side in the flow direction of the oil O in the first oil squirting portion 211 is an inclined surface 218b located on the downstream side as it faces the inner surface of the first oil squirting portion 211. In the present embodiment, the inclined surface 218b is a surface on the right side of the protrusion 218.

As described above, in the present embodiment, the first through hole 216a is located on the upstream side in the flow direction of the oil O in the first oil squirting part 211 from the inner side surface toward the outer side surface of the first oil squirting part 211. Therefore, the oil O flowing in the first through hole 216a flows toward the upstream side in the flow direction of the oil O in the first oil ejecting portion 211 in the axial direction. In other words, the axial direction of the oil O flowing through the first through hole 216a is opposite to the axial direction of the oil O flowing through the first oil ejecting portion 211. In contrast, in the present embodiment, the projection 218 is provided, so that a part of the oil O flowing in the first oil ejecting portion 211 can be blocked and easily guided into the first through hole 216 a. This makes it possible to easily inject the oil O from the first supply port 215 a. Specifically, in the present embodiment, a part of the oil O flowing from the left side to the right side in the first oil ejecting portion 211 flows into the left side while being blocked by the vertical surface 218a, and flows into the first through hole 216 a.

As shown in fig. 11, in the present embodiment, the second supply port 215b overlaps the oil passage portion 168 as viewed in the vertical direction. The second supply port 215b is located above the upper opening 168a of the oil passage portion 168. A part of the second supply port 215b is offset and disposed on the left side of the oil passage portion 168 and the second bearing 27. The second supply port 215b is an opening portion that opens on the outer surface of the second oil squirt part 212, among opening portions of the second through hole 216b that penetrate the wall portion of the second oil squirt part 212 from the inner surface to the outer surface. The second through hole 216b extends in a radial direction around the central axis of the second oil ejecting portion 212. Although not shown, the second supply port 215b opens toward the guide portion located around the upper opening portion 168 a. The second supply port 215b is open obliquely rearward to the lower side, for example.

The second oil jet part 212 includes a guide part 219 for guiding the oil O to the second bearing 27 in a peripheral edge part of the second supply port 215 b. Therefore, the oil O injected from the second supply port 215b can be appropriately supplied to the second bearing 27 via the guide portion 219. The guide part 219 protrudes in the direction in which the second through hole 216b extends. The guide part 219 protrudes diagonally rearward to the lower side.

The guide part 219 has an inclined surface 219a extending from the edge of the second supply port 215b to the top 219b of the guide part 219. The inclined surface 219a is located on the right side as it faces outward in the radial direction around the center axis of the second oil ejecting portion 212. That is, the inclined surface 219a approaches the wall portion 61b holding the second bearing 27 as it goes outward in the radial direction around the center axis of the second oil ejecting portion 212. In the present embodiment, the top 219b is the radially outer end portion centered on the central axis of the second oil squirting part 212, out of the right-hand end portions of the guide part 219. The top 219b is located above the upper opening 168 a.

As shown in fig. 11, at least a part of the oil O injected from the second supply port 215b flows to the top 219b along the inclined surface 219a of the guide part 219. The oil O reaching the top part 219b drops vertically downward, and flows into the oil passage part 168 through the upper opening part 168 a. Thereby, at least a part of the oil O injected from the second supply port 215b is supplied to the second bearing 27 via the oil passage portion 168. Therefore, even when a part of the second supply port 215b is disposed offset from the oil passage portion 168 as in the present embodiment and when the entire second supply port 215b is disposed apart from the oil passage portion 168 in the axial direction, the oil O injected from the second supply port 215b can be appropriately supplied to the second bearing 27 by disposing the apex portion 219b above the oil passage portion 168.

The other structure of the first oil squirting part 211 of the present embodiment can be the same as the other structure of the first oil squirting part 11 of the first embodiment. Other configurations of the second oil squirting part 212 of the present embodiment can be the same as those of the second oil squirting part 12 of the first embodiment.

< third embodiment >

As shown in fig. 12, the oil passage portion 368 of the present embodiment extends in the vertical direction when viewed in the axial direction. The upper opening portion 368a of the oil passage portion 368 opens directly upward in the vertical direction. The guide portion 369 of the present embodiment has a first rib 366 and a recessed portion 364 j. In the present embodiment, the first rib 366 is provided on the outer side surface of the support portion 64 at a position spaced rearward from the oil passage portion 368.

The concave portion 364j is provided on the outer surface of the support portion 64. More specifically, the concave portion 364j is provided in the peripheral edge portion of the upper opening 368a in the outer surface of the support portion 64. In the present embodiment, the recess 364j is located on the rear side of the upper opening 368 a. The concave portion 364j is recessed radially inward. More specifically, the concave portion 364j is concave in the direction toward which the first supply port 315a of the present embodiment faces. The concave portion 364j is, for example, recessed obliquely rearward toward the lower side. The inner surface of the recess 364j connects the upper opening 368a and the first rib 366.

In the present embodiment, the first oil jet portion 311 is located above the oil passage portion 368. The first supply port 315a of the first oil jet portion 311 overlaps the oil passage portion 368 as viewed in the vertical direction. The first supply port 315a is located above the upper opening 368 a. The first supply port 315a opens diagonally rearward to the lower side. The first supply port 315a opens toward the recess 364 j. Therefore, the oil O injected from the first supply port 315a with sufficient momentum is blown to the concave portion 364 j. Thereby, the potential of the oil O injected from the first supply port 315a can be reduced by the concave portion 364 j. By providing the concave portion 364j in the guide portion 369, the oil O injected from the first supply port 315a can be easily received. Therefore, the oil O injected into the guide portion 369 can be suppressed from scattering, and the oil O can be easily guided to the oil passage portion 368 by the guide portion 369. Therefore, the oil O injected from the first supply port 315a can be easily supplied to the first bearing 26.

As shown by the broken line in fig. 12, when the oil O drops from the first supply port 315a directly downward due to, for example, a low temperature of the oil O, the oil O dropped from the first supply port 315a flows into the oil passage portion 368 through the upper opening portion 368a that opens directly upward in the vertical direction. In the present embodiment, since the oil passage portion 368 extends in the vertical direction, the speed of the oil O flowing toward the inside of the support portion 64 in the oil passage portion 368 can be easily increased as compared with the case where the oil passage portion 368 is inclined with respect to the vertical direction. Thus, even when the temperature of the oil O is low and the speed of the oil O is low, the oil O dropped from the first supply port 315a can be easily supplied to the first bearing 26 in a short time.

Other configurations of the first oil squirting part 311 of the present embodiment can be the same as those of the first oil squirting part 11 of the first embodiment. The other structure of the oil passage portion 368 can be the same as that of the oil passage portion 68 of the first embodiment.

The present invention is not limited to the above-described embodiments, and other configurations can be adopted within the scope of the technical idea of the present invention. The relative positional relationship between the first supply port and the first bearing is not particularly limited. The relative positional relationship between the second supply port and the second bearing is not particularly limited. The orientation of the first supply port opening and the orientation of the second supply port opening are not particularly limited. The first supply port may also be open toward the first rib in the guide portion that guides the oil O to the oil passage portion. The first supply port may not be opened to a guide portion that guides the oil O to the oil passage portion.

The first oil ejecting portion may be provided with a plurality of first supply ports for supplying the oil O to the first bearing. A plurality of second supply ports for supplying the oil O to the second bearing may be provided in the second oil ejecting portion. The number of the first supply ports and the number of the second supply ports may be the same as or different from each other.

The opening area of the first supply port and the opening area of the second supply port may be the same as each other. In this configuration, the pressure of the oil O injected from the first supply port and the pressure of the oil O injected from the second supply port can be more easily equalized. In the case where a plurality of first supply ports and a plurality of second supply ports are provided, the total opening area obtained by adding the opening areas of the plurality of first supply ports and the total opening area obtained by adding the opening areas of the second supply ports may be the same as or different from each other. In the case where the total opening area of the first supply port and the total opening area of the second supply port are the same as each other, it is easy to make the pressure of the oil O injected from the first supply port and the pressure of the oil O injected from the second supply port more equal. One of the first supply port and the second supply port may be provided only one, and the other of the first supply port and the second supply port may be provided in plurality. In this case, the opening area of one of the supply ports and the total opening area obtained by adding the opening areas of the plurality of supply ports may be the same as or different from each other.

When the first oil squirting component and the second oil squirting component are pipes, each pipe may be a polygonal tubular pipe. The first oil squirter and the second oil squirter may not be pipes. The first oil ejecting portion and the second oil ejecting portion may be oil passages provided in the housing. As long as the injection ports of the first oil injection portion and the second oil injection portion inject the oil O toward the stator, the oil O may be injected to any portion of the stator. The injection port of the first oil injection portion may not include the injection port that injects the oil O to the coil end, or may not include the injection port that injects the oil O to the stator core. The injection port of the second oil injection portion may not include the injection port that injects the oil O to the coil end, or may not include the injection port that injects the oil O to the stator core.

The first through-hole may have the same configuration as the second through-hole 16b in the first embodiment. That is, the inner surface of the first through hole may have an extension surface extending from the inner surface of the first oil ejecting portion in a second direction orthogonal to the first direction in which the first oil ejecting portion extends, and an inclined surface extending from a tip end of the extension surface of the first through hole to the outer surface of the first oil ejecting portion. According to this configuration, the wall portion of the first oil squirting part 11 can be prevented from being thinned at the edge of the opening portion that opens inside the first oil squirting part, among the opening portions of the first through hole. Therefore, similarly to the second through-holes 16b of the first embodiment, variation in the amount of oil O flowing into the first through-holes can be suppressed. Further, the edge portion of the opening of the first through-hole can be prevented from being partially damaged and separated, and foreign matter can be prevented from being mixed into the oil O.

The first oil ejecting portion may include a guide portion for guiding the oil O to the first bearing in a peripheral edge portion of the first supply port. According to this configuration, the oil O injected from the first supply port can be appropriately supplied to the first bearing via the guide portion, similarly to the second oil injection portion 212 of the second embodiment described above. The first oil squirting part may have a guide part that guides the oil O to the first bearing at a peripheral edge of the first supply port, and the second oil squirting part may have a guide part that guides the oil O to the second bearing at a peripheral edge of the second supply port. According to this structure, oil can be easily and efficiently supplied to both the first bearing and the second bearing.

The oil passage portion is not particularly limited as long as it has an upper opening portion and extends from the outside to the inside of the support portion. The oil passage portion may be free of the second rib. In this case, when the oil O drops from the first supply port, for example, when the temperature of the oil O is low, the oil O may be directly introduced into the through portion provided in the oil passage portion. The inclined surface of the inner surface of the oil passage portion, which is closer to the bearing as it goes from the upper opening portion toward the inside of the support portion, may be inclined in any direction. The oil passage portion may not be provided. The structure of the guide portion that guides the oil O to the oil passage portion is not particularly limited. The guide portion that guides the oil O to the oil passage portion may be free of the first rib. The guide portion for guiding the oil O to the oil passage portion may not be provided.

The oil supply path connecting the first oil squirting component and the second oil squirting component may be of any shape or may be provided at any position.

The driving device is not particularly limited as long as it can move the object to be driven using a motor as a power source. The drive device may not include a transmission mechanism. The torque of the motor may be directly output from the shaft of the motor to the target. In this case, the driving device corresponds to the motor itself. The direction in which the motor shaft extends is not particularly limited. The motor shaft may also extend in a direction inclined with respect to the horizontal direction. In the present specification, the phrase "the motor shaft extends in the horizontal direction orthogonal to the vertical direction" includes a case where the motor shaft extends in the substantially horizontal direction, in addition to a case where the motor shaft extends strictly in the horizontal direction. That is, in the present specification, the "motor shaft extends in the horizontal direction orthogonal to the vertical direction", and the motor shaft may be slightly inclined with respect to the horizontal direction. In the above-described embodiment, the case where the driving device does not include the inverter unit has been described, but the present invention is not limited thereto. The drive device may also include an inverter unit. In other words, the drive device may be configured integrally with the inverter unit.

The use of the driving device is not particularly limited. The drive device may not be mounted on the vehicle. The structures described in this specification can be combined as appropriate within a range not contradictory to each other.

Claims (14)

1. A drive device is characterized by comprising:

a motor having a rotor rotatable about a motor shaft and a stator located radially outward of the rotor;

a first oil injection unit and a second oil injection unit having injection ports for injecting oil toward the stator; and

an oil supply passage connected to both the first oil ejecting portion and the second oil ejecting portion,

the motor comprises:

a first bearing that rotatably supports one axial side of the rotor; and

a second bearing rotatably supporting the other side of the rotor in the axial direction,

the first oil injection part has a first supply port for supplying oil to the first bearing,

the second oil ejecting portion has a second supply port for supplying oil to the second bearing.

2. The drive device according to claim 1,

a portion of the oil supply passage to which the second oil ejecting portion is connected is located upstream of a portion of the oil supply passage to which the first oil ejecting portion is connected in the flow direction of the oil in the oil supply passage,

the length of the flow path from the oil supply passage to the second supply port is longer than the length of the flow path from the oil supply passage to the first supply port.

3. The drive device according to claim 1 or 2,

the opening area of the first supply port and the opening area of the second supply port are the same.

4. The drive device according to any one of claims 1 to 3,

the first oil ejecting portion has a first through hole that penetrates a wall portion of the first oil ejecting portion from an inner side surface to an outer side surface,

the second oil ejecting portion has a second through hole penetrating a wall portion of the second oil ejecting portion from an inner side surface to an outer side surface,

the first supply port is an opening portion that opens on an outer side surface of the first oil ejecting portion among the opening portions of the first through hole,

the second supply port is an opening portion that opens on an outer surface of the second oil ejecting portion, among opening portions of the second through hole.

5. The drive device according to claim 4,

an opening area of an opening portion of the first through hole that opens to the inner side surface of the first oil ejecting portion and an opening area of an opening portion of the second through hole that opens to the inner side surface of the second oil ejecting portion are the same.

6. The drive device according to claim 4 or 5,

an inner surface of the first through hole has an inclined surface that approaches the first bearing as the inclined surface faces an outer surface of the first oil ejecting portion.

7. The drive device according to claim 6,

the first oil ejecting portion extends in a predetermined first direction,

an inner surface of the first through hole has an extension surface extending from the inner surface of the first oil ejecting portion in a second direction orthogonal to the first direction,

the inclined surface of the first through hole extends from a tip end of the extending surface of the first through hole to an outer surface of the first oil ejecting portion.

8. The drive device according to any one of claims 4 to 7,

an inner surface of the second through hole has an inclined surface that approaches the second bearing as the inclined surface faces an outer surface of the second oil ejecting portion.

9. The drive device according to claim 8,

the second oil ejecting portion extends in a predetermined first direction,

an inner surface of the second through hole has an extended surface extending from the inner surface of the second oil ejecting portion in a second direction orthogonal to the first direction,

the inclined surface of the second through hole extends from a distal end of the extending surface of the second through hole to an outer surface of the second oil ejecting portion.

10. The drive device according to claim 7 or 9,

in a third direction orthogonal to both the first direction and the second direction, a maximum width of the inclined surface is equal to or less than a maximum width of the extended surface.

11. The drive device according to any one of claims 1 to 10,

the flow path area of the first oil squirting component and the flow path area of the second oil squirting component are the same.

12. The drive device according to any one of claims 1 to 11,

the first oil jet portion includes a guide portion that guides oil to the first bearing at a peripheral edge portion of the first supply port.

13. The drive device according to any one of claims 1 to 12,

the second oil ejecting portion includes a guide portion that guides oil to the second bearing at a peripheral edge portion of the second supply port.

14. The drive device according to any one of claims 1 to 13,

further comprises a housing for accommodating the motor therein,

the first oil squirting part and the second oil squirting part are pipes fixed to the housing,

the housing has the oil supply passage.

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