JP2020174482A - Motor and driving device - Google Patents

Abstract

To provide a motor and a driving device including a structure capable of improving the cooling efficiency of a stator.SOLUTION: A motor 2 includes a rotor, a stator 30 facing the rotor radially through a gap, a motor housing that houses oil O inside, a reservoir 10 located on the upper side of the stator 30 in the vertical direction and storing oil O, and a supply oil channel that supplies oil O to the reservoir 10. The stator 30 includes a stator core 32 and a plurality of coils. The reservoir 10 includes a first oil passage portion 11 extending in the axial direction a second oil passage portion 12 extending in the axial direction and sandwiching a motor shaft with the first oil passage portion 11 when viewed along the vertical direction, third oil passage portions 13A and 13B that connect the first oil passage portion 11 and the second oil passage portion 12. The first oil passage portion 11 includes a first oil supply port that supplies oil O to the stator from the upper side in the vertical direction. The second oil passage portion 12 includes a second oil supply port that supplies oil O to the stator 30 from the upper side in the vertical direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a motor and a driving device.

A motor having a structure for cooling the stator is known. For example, Patent Document 1 describes a motor that supplies oil to a coil to cool a stator.

International Publication No. 2012/043307

In a motor having a structure for cooling the stator as described above, further improvement in cooling efficiency of the stator has been required.

In view of the above circumstances, one of the objects of the present invention is to provide a motor and a driving device having a structure capable of improving the cooling efficiency of the stator.

One aspect of the motor of the present invention is a rotor that rotates about a motor shaft extending in a horizontal direction orthogonal to the vertical direction, a stator that faces the rotor in the radial direction with a gap, and the rotor and the rotor inside. A motor accommodating portion for accommodating a stator and accommodating oil inside, a reservoir located on the upper side in the vertical direction of the stator for accommodating the oil, and a supply oil passage for supplying the oil to the reservoir. To be equipped. The stator has a stator core and a plurality of coils attached to the stator core along the circumferential direction. The reservoir includes a first oil passage portion extending in the axial direction, a second oil passage portion extending in the axial direction, and sandwiching the motor shaft between the first oil passage portion when viewed along the vertical direction. It has a third oil passage portion that connects the first oil passage portion and the second oil passage portion. The first oil passage portion has a first oil supply port for supplying the oil to the stator from the upper side in the vertical direction. The second oil passage portion has a second oil supply port for supplying the oil to the stator from the upper side in the vertical direction.

One aspect of the motor of the present invention is a rotor that rotates about a motor shaft extending in a horizontal direction orthogonal to the vertical direction, a stator that faces the rotor in the radial direction with a gap, and the rotor and the rotor inside. A motor accommodating portion for accommodating a stator and accommodating oil inside, a reservoir located on the upper side in the vertical direction of the stator for accommodating the oil, and a supply oil passage for supplying the oil to the reservoir. To be equipped. The stator has a stator core and a plurality of coils attached to the stator core along the circumferential direction. The reservoir has a first oil passage that extends axially. The first oil passage portion has a first oil supply port for supplying the oil to the stator core from the upper side in the vertical direction. A plurality of the first oil supply ports are provided along the direction in which the first oil passage portion extends.

One embodiment of the drive device of the present invention includes the above-mentioned motor and a transmission device connected to the above-mentioned motor. One aspect of the drive device of the present invention is mounted on a vehicle.

According to one aspect of the present invention, the cooling efficiency of the stator can be improved in the motor and the driving device.

FIG. 1 is a schematic configuration diagram schematically showing a driving device of the first embodiment. FIG. 2 is a perspective view showing a part of the motor of the first embodiment. FIG. 3 is a view of a part of the motor of the first embodiment as viewed from above. FIG. 4 is a perspective view showing a second reservoir of the first embodiment. FIG. 5 is a cross-sectional view showing a part of the motor of the first embodiment, and is a VV cross-sectional view in FIG. FIG. 6 is a cross-sectional view showing a part of the motor of the first embodiment, and is a sectional view taken along line VI-VI in FIG. FIG. 7 is a perspective view showing a part of the motor in the modified example of the first embodiment. FIG. 8 is a diagram showing a part of the motor in the modified example of the first embodiment, and is a cross-sectional view taken along the line VIII-VIII of FIG. FIG. 9 is a perspective view showing a part of the motor of the second embodiment. FIG. 10 is a view of a part of the motor of the second embodiment as viewed from above. FIG. 11 is a perspective view showing a second reservoir of the second embodiment. FIG. 12 is a cross-sectional view showing a part of the motor of the second embodiment, and is a cross-sectional view of XII-XII in FIG.

In the following description, the vertical direction will be defined and described based on the positional relationship when the drive device of the embodiment shown in each figure is mounted on a vehicle located on a horizontal road surface. Further, in the drawings, the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate. 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 upper side in the vertical direction is simply referred to as "upper side", and the lower side in the vertical direction 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 the vehicle on which the drive 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 the left-right direction of the vehicle, that is, the 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. In the following embodiments, the right side corresponds to one side in the axial direction, and the left side corresponds to the other side in the axial direction. 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 of 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.

The motor shaft J1 shown in each figure extends in the Y-axis direction, that is, in the left-right direction of the vehicle. In the following description, unless otherwise specified, the direction parallel to the motor shaft J1 is simply referred to as the "axial direction", the radial direction centered on the motor shaft J1 is simply referred to as the "radial direction", and the motor shaft J1 is referred to as the motor shaft J1. The circumferential direction around the center, that is, the circumference of the motor shaft J1 is simply called the "circumferential direction". In the present specification, the "parallel direction" includes a substantially parallel direction, and the "orthogonal direction" also includes a substantially orthogonal direction.

<First Embodiment>
The drive device 1 of the present embodiment shown in FIG. 1 is mounted on a vehicle powered by a motor, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and an electric vehicle (EV), and is used as the power source thereof. Will be done. As shown in FIG. 1, the drive device 1 includes a motor 2, a transmission device 3 including a speed reducer 4 and a differential device 5, a housing 6, and an inverter unit 8.

The housing 6 has a motor accommodating portion 81, a gear accommodating portion 82, and a partition wall 61c. The motor accommodating portion 81 is a portion accommodating the rotor 20 and the stator 30, which will be described later, inside. The gear accommodating portion 82 is a portion accommodating the transmission device 3 inside. The gear accommodating portion 82 is located on the left side of the motor accommodating portion 81. The bottom portion 81a of the motor accommodating portion 81 is located above the bottom portion 82a of the gear accommodating portion 82. The partition wall 61c axially partitions the inside of the motor accommodating portion 81 and the inside of the gear accommodating portion 82. The partition wall 61c is provided with a partition wall opening 68. The partition wall opening 68 connects the inside of the motor accommodating portion 81 and the inside of the gear accommodating portion 82.

Oil O is housed inside the motor housing part 81 and inside the gear housing part 82. An oil reservoir P in which the oil O is accumulated is provided in the lower region inside the gear accommodating portion 82. The oil O in the oil sump P is sent to the inside of the motor accommodating portion 81 by the oil passage 90 described later. The oil O sent to the inside of the motor accommodating portion 81 collects in the lower region inside the motor accommodating portion 81. At least a part of the oil O accumulated inside the motor accommodating portion 81 moves to the gear accommodating portion 82 via the partition wall opening 68 and returns to the oil sump P.

In addition, in this specification, "oil is stored inside a certain part" means that the oil is located inside a certain part at least in a part while the motor is being driven, and the motor The oil does not have to be located inside a part when is stopped. For example, in the present embodiment, the fact that the oil O is stored inside the motor housing portion 81 means that the oil O is located inside the motor housing portion 81 at least in a part while the motor 2 is being driven. However, when the motor 2 is stopped, all the oil O inside the motor accommodating portion 81 may have moved to the gear accommodating portion 82 through the partition wall opening 68. A part of the oil O sent to the inside of the motor accommodating portion 81 by the oil passage 90 described later may remain inside the motor accommodating portion 81 when the motor 2 is stopped.

The oil O circulates in the oil passage 90 described later. The oil O is used for lubricating the speed reducer 4 and the differential device 5. Further, the oil O is used for cooling the motor 2. As the oil O, it is preferable to use an oil equivalent to that of an automatic transmission fluid (ATF) having a relatively low viscosity in order to perform the functions of the lubricating oil and the cooling oil.

In the present embodiment, the motor 2 is an inner rotor type motor. The motor 2 includes a rotor 20, a stator 30, a motor accommodating portion 81, and bearings 26 and 27. The rotor 20 rotates about a motor shaft J1 extending in the horizontal direction. The rotor 20 includes a shaft 21 and a rotor body 24. Although not shown, the rotor body 24 has 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 21 extends along the axial direction about the motor shaft J1. The shaft 21 rotates about the motor shaft J1. The shaft 21 is a hollow shaft provided with a hollow portion 22 inside. The shaft 21 is provided with a communication hole 23. The communication hole 23 extends in the radial direction and connects the hollow portion 22 and the outside of the shaft 21.

The shaft 21 extends across the motor housing portion 81 and the gear housing portion 82 of the housing 6. The left end of the shaft 21 projects into the gear accommodating portion 82. A first gear 41, which will be described later, of the transmission device 3 is fixed to the left end of the shaft 21. The shaft 21 is rotatably supported by bearings 26 and 27.

The stator 30 faces the rotor 20 in the radial direction with a gap. More specifically, the stator 30 is located radially outward of the rotor 20. The stator 30 has a stator core 32 and a coil assembly 33. The stator core 32 is fixed to the inner peripheral surface of the motor accommodating portion 81. As shown in FIGS. 2 and 3, the stator core 32 has a stator core main body 32a and a fixing portion 32b. Although not shown, the stator core 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 fixing portion 32b projects radially outward from the outer peripheral surface of the stator core main body 32a. The fixing portion 32b is a portion fixed to the motor accommodating portion 81. As shown in FIG. 2, a plurality of fixing portions 32b are provided at intervals along the circumferential direction. One of the fixing portions 32b projects upward from the stator core main body 32a. The fixing portion 32b has a through hole 32c that penetrates the fixing portion 32b in the axial direction. Although not shown, the stator 30 is fixed to the housing 6 by tightening the screw passed through the through hole 32c into the motor accommodating portion 81.

As shown in FIG. 1, the coil assembly 33 has a plurality of coils 31 attached to the stator core 32 along the circumferential direction. The plurality of coils 31 are respectively mounted on each tooth of the stator core 32 via an insulator (not shown). The plurality of coils 31 are arranged along the circumferential direction. More specifically, the plurality of coils 31 are arranged at equal intervals over one circumference along the circumferential direction. Although not shown, the coil assembly 33 may have a binding member or the like that binds each coil 31, or may have a crossover connecting the coils 31 to each other.

The coil assembly 33 has coil ends 33a and 33b that project axially from the stator core 32. The coil end 33a is a portion protruding to the right from the stator core 32. The coil end 33b is a portion protruding to the left from the stator core 32. The coil end 33a includes a portion of each coil 31 included in the coil assembly 33 that protrudes to the right side of the stator core 32. The coil end 33b includes a portion of each coil 31 included in the coil assembly 33 that protrudes to the left side of the stator core 32. In the present embodiment, the coil ends 33a and 33b are annular around the motor shaft J1. Although not shown, the coil ends 33a and 33b may include a binding member or the like that binds the coils 31, or may include a crossover connecting the coils 31 to each other.

Bearings 26 and 27 rotatably support the rotor 20. The bearings 26 and 27 are, for example, ball bearings. As shown in FIG. 1, the bearing 26 is a bearing that rotatably supports a portion of the rotor 20 located on the right side of the stator core 32. In the present embodiment, the bearing 26 supports a portion of the shaft 21 located on the right side of the portion to which the rotor body 24 is fixed. The bearing 26 is held by a wall portion of the motor accommodating portion 81 that covers the right side of the rotor 20 and the stator 30.

The bearing 27 is a bearing that rotatably supports a portion of the rotor 20 located on the left side of the stator core 32. In the present embodiment, the bearing 27 supports a portion of the shaft 21 located on the left side of the portion to which the rotor body 24 is fixed. The bearing 27 is held by the partition wall 61c.

The transmission device 3 is housed in the gear housing portion 82 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 21. The transmission device 3 includes a speed reducer 4 and a differential device 5. The torque output from the motor 2 is transmitted to the differential device 5 via the speed reducer 4.

The speed reducer 4 is connected to the motor 2. The speed reduction device 4 reduces the rotation speed of the motor 2 and increases the torque output from the motor 2 according to the reduction ratio. The speed reducing device 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 45.

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

The torque output from the motor 2 is transmitted to the ring gear 51 of the differential device 5 via the shaft 21, the first gear 41, the second gear 42, the intermediate shaft 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 the required reduction ratio. In the present embodiment, the speed reducer 4 is a parallel shaft gear type speed reducer in which the shaft cores of the gears are arranged in parallel.

The differential device 5 is connected to the motor 2 via the speed reducer 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. The differential device 5 includes a ring gear 51, a gear housing (not shown), a pair of pinion gears (not shown), a pinion shaft (not shown), and a pair of side gears (not shown). The ring gear 51 rotates about a differential shaft J3 parallel to the motor shaft J1. The torque output from the motor 2 is transmitted to the ring gear 51 via the speed reducer 4.

The motor 2 is provided with an oil passage 90 in which the oil O circulates inside the housing 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 leads the oil O to the oil sump P again. The oil passage 90 is provided so as to straddle the inside of the motor accommodating portion 81 and the inside of the gear accommodating portion 82.

In addition, in this specification, "oil passage" means an oil route. Therefore, the "oil passage" is a concept that includes not only a "flow path" that constantly creates a flow of oil in one direction, but also a path for temporarily retaining oil and a path for oil to drip. The route 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 the oil O inside the housing 6, respectively. The first oil passage 91 has a scooping path 91a, a shaft supply path 91b, an in-shaft path 91c, and an in-rotor path 91d. Further, a first reservoir 93 is provided in the path of the first oil passage 91. The first reservoir 93 is provided in the gear accommodating portion 82.

The scooping path 91a is a path in which the oil O is scooped up from the oil sump P by the rotation of the ring gear 51 of the differential device 5 and the oil O is received in the first reservoir 93. The first reservoir 93 opens upward. The first reservoir 93 receives the oil O scooped up by the ring gear 51. Further, when the liquid level of the oil sump P is high, such as immediately after the motor 2 is driven, the first reservoir 93 is pumped up by the second gear 42 and the third gear 43 in addition to the ring gear 51. Also receives O.

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

In the in-shaft path 91c, centrifugal force is applied to the oil O inside the rotor 20 as the rotor 20 rotates. As a result, the oil O continuously scatters radially outward from the rotor 20. Further, as the oil O scatters, the path inside the rotor 20 becomes negative pressure, the oil O accumulated 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 that has reached the stator 30 takes heat from the stator 30. The oil O that has cooled the stator 30 is dropped on the lower side and accumulated in the lower region in the motor accommodating portion 81. The oil O accumulated in the lower region in the motor accommodating portion 81 moves to the gear accommodating portion 82 through the partition wall opening 68 provided in the partition wall 61c. 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 pulled up from the oil sump P to the upper side of the stator 30 and supplied to the stator 30. That is, the second oil passage 92 supplies the oil O to the stator 30 from above the stator 30. The second oil passage 92 is provided with an oil pump 96, a cooler 97, and a second reservoir 10. The second oil passage 92 has a first flow path 92a, a second flow path 92b, and a third flow path 92c.

The first flow path 92a, the second flow path 92b, and the third flow path 92c are provided on the 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 extends upward from the cooler 97. The third flow path 92c is provided on the wall portion of the motor accommodating portion 81. That is, the motor 2 includes a third flow path 92c. As shown in FIGS. 2 and 3, the third flow path 92c has a supply port 92ca that opens inside the motor accommodating portion 81 on the upper side of the stator 30. The supply port 92ca supplies oil O to the inside of the motor accommodating portion 81.

The oil pump 96 is an electric pump driven by electricity. As shown in FIG. 1, the oil pump 96 sucks oil O from the oil sump P through the first flow path 92a, and sucks up oil O from the second flow path 92b, the cooler 97, the third flow path 92c, and the second flow path 92c. Oil O is supplied to the motor 2 through the reservoir 10.

The cooler 97 cools the oil O passing through the second oil passage 92. A first flow path 92a and a second flow path 92b are connected to the cooler 97. The first flow path 92a and the second flow path 92b are connected via the internal flow path of the cooler 97. A cooling water pipe 97j for passing cooling water cooled by a radiator (not shown) is connected to the cooler 97. The oil O passing through the inside of the cooler 97 is cooled by exchanging heat with the cooling water passing through the cooling water pipe 97j. An inverter unit 8 is provided in the path of the cooling water pipe 97j. The cooling water passing through the cooling water pipe 97j cools the inverter unit 8.

The second reservoir 10 constitutes a part of the second oil passage 92. The second reservoir 10 is located inside the motor accommodating portion 81. The second reservoir 10 is located above the stator 30. As shown in FIG. 2, the second reservoir 10 is supported from below by the stator 30 and is provided in the motor 2. That is, the motor 2 includes a second reservoir 10. The second reservoir 10 is made of, for example, a resin material.

In the following description, for a certain object, the side close to the center of the stator 30 in the axial direction may be referred to as "inward in the axial direction", and the side far from the center of the stator 30 in the axial direction is referred to as "axial direction". Sometimes called "outside".

In the present embodiment, the second reservoir 10 has a gutter shape that opens upward and extends in a substantially rectangular frame shape when viewed along the vertical direction. The second reservoir 10 stores the oil O. In the present embodiment, the second reservoir 10 stores the oil O supplied into the motor accommodating portion 81 via the third flow path 92c. That is, in the present embodiment, the third flow path 92c corresponds to the supply oil passage for supplying the oil O to the second reservoir 10. In the present embodiment, since the second reservoir 10 has a gutter shape that opens upward, it is easy to flow the oil O from the third flow path 92c on the upper side of the second reservoir 10 to the second reservoir 10. Oil O can be supplied to the gutter. As shown in FIGS. 2 to 4, the second reservoir 10 includes a first oil passage portion 11, a second oil passage portion 12, a pair of third oil passage portions 13A and 13B, and a first fixing portion 18. And the support ribs 16a and 16b.

The first oil passage portion 11 and the second oil passage portion 12 extend in the axial direction. The first oil passage portion 11 and the second oil passage portion 12 are arranged at intervals in the front-rear direction. As shown in FIG. 3, the second oil passage portion 12 sandwiches the motor shaft J1 with the first oil passage portion 11 when viewed along the vertical direction. The first oil passage portion 11 is located on the front side of the motor shaft J1. The second oil passage portion 12 is located on the rear side of the motor shaft J1.

The pair of third oil passage portions 13A and 13B extend in the front-rear direction. The pair of third oil passage portions 13A and 13B are arranged at intervals in the axial direction. The pair of third oil passage portions 13A and 13B connect the first oil passage portion 11 and the second oil passage portion 12, respectively. In the present embodiment, one of the pair of third oil passages 13A and 13B, the third oil passage portion 13A, has a right end portion of the first oil passage portion 11 and a right end portion of the second oil passage portion 12. Connect. In the present embodiment, the other third oil passage portion 13B of the pair of third oil passage portions 13A and 13B includes the left end portion of the first oil passage portion 11 and the left end portion of the second oil passage portion 12. Connect. The first oil passage portion 11, the second oil passage portion 12, and the pair of third oil passage portions 13A and 13B each have a gutter shape having a substantially U-shaped cross section that opens upward.

The first oil passage portion 11 is located above the stator core 32. In the present embodiment, the first oil passage portion 11 is located on the front side of the fixing portion 32b protruding upward from the fixing portion 32b. The first oil passage portion 11 has a first bottom wall portion 11a and a pair of first side wall portions 11b and 11c.

The first bottom wall portion 11a extends in the axial direction. The first bottom wall portion 11a has a plate shape in which the plate surface faces in the vertical direction. As shown in FIG. 5, the first bottom wall portion 11a faces the outer peripheral surface of the stator core main body 32a via a gap. The upper surface of the first bottom wall portion 11a has a flat portion 11aa and inclined portions 11ab, 11ac. The flat portion 11aa is a flat portion orthogonal to the vertical direction. The flat portion 11aa is provided on a portion of the upper surface of the first bottom wall portion 11a that is closer to the left side than the center in the axial direction.

The inclined portions 11ab and 11ac are portions inclined with respect to the flat portion 11aa. The inclined portion 11ab extends to the right from the flat portion 11aa. The inclined portion 11ab is located downward from the flat portion 11aa toward the right side. The inclined portion 11ac extends to the left from the flat portion 11aa. The inclined portion 11ac is located on the lower side from the flat portion 11aa toward the left side. The axial dimension of the inclined portion 11ab is larger than the axial dimension of the inclined portion 11ac.

As shown in FIG. 2, the first side wall portion 11b projects upward from the rear edge portion of the first bottom wall portion 11a. The first side wall portion 11c projects upward from the front edge portion of the first bottom wall portion 11a. The pair of first side wall portions 11b, 11c extend in the axial direction. The pair of first side wall portions 11b and 11c have a plate shape in which the plate surfaces face in the front-rear direction. The upper end portion of the first side wall portion 11b is located above the upper end portion of the first side wall portion 11c.

The first oil passage portion 11 is located below the supply port 92ca. As a result, the first oil passage portion 11 receives the oil O supplied into the motor accommodating portion 81 from the supply port 92ca. In the present embodiment, the supply port 92ca is arranged at a position separated inward in the axial direction from the ends on both sides in the axial direction of the first oil passage portion 11. As shown in FIG. 3, the supply port 92ca overlaps the left side portion of the first bottom wall portion 11a when viewed along the vertical direction. More specifically, the supply port 92ca overlaps the flat portion 11aa when viewed along the vertical direction.

As shown in FIGS. 3 to 5, the first oil passage portion 11 has a first oil supply port 17a that supplies oil O to the stator 30 from above. In the present embodiment, the first oil supply port 17a is a through hole that penetrates the first bottom wall portion 11a in the axial direction. The first oil supply port 17a has, for example, a circular shape. The first oil supply port 17a is located above the stator 30. More specifically, the first oil supply port 17a is located away from the upper side of the stator core 32. As shown in FIG. 5, a part of the oil O supplied to the first oil passage portion 11 flows out to the lower side of the first oil passage portion 11 through the first oil supply port 17a, and is upper to the stator core 32. Supplied from. As described above, in the present embodiment, the first oil supply port 17a supplies the oil O to the stator core 32 from above.

In the present embodiment, a plurality of first oil supply ports 17a are provided along the axial direction in which the first oil passage portion 11 extends. In this embodiment, for example, three first oil supply ports 17a are provided. More specifically, the first oil supply port 17a is provided on the flat portion 11aa and two on the inclined portion 11ab, respectively. As shown in FIG. 3, the first oil supply port 17a provided in the flat portion 11aa overlaps with the supply port 92ca when viewed along the vertical direction.

As shown in FIG. 2, the second oil passage portion 12 is located above the stator core 32. In the present embodiment, the second oil passage portion 12 is located on the rear side of the fixing portion 32b protruding upward from the fixing portion 32b. Therefore, the first oil passage portion 11 and the second oil passage portion 12 are arranged so as to sandwich the fixing portion 32b protruding upward among the fixing portions 32b in the front-rear direction. The size of the second oil passage portion 12 in the front-rear direction is smaller than the dimension of the first oil passage portion 11 in the front-rear direction. The lower end of the second oil passage 12 is located below the lower end of the first oil passage 11. The second oil passage portion 12 has a second bottom wall portion 12a and a pair of second side wall portions 12b and 12c.

The second bottom wall portion 12a extends in the axial direction. The upper surface of the second bottom wall portion 12a is located below the upper surface of the first bottom wall portion 11a. The right end of the upper surface of the second bottom wall portion 12a is an inclined surface 12d located on the lower side toward the inside in the axial direction. As shown in FIG. 6, the second bottom wall portion 12a faces the outer peripheral surface of the stator core main body 32a via a gap. The shape of the second bottom wall portion 12a in the cross section orthogonal to the axial direction is a substantially V shape that opens upward except for the portion where the inclined surface 12d is provided. Therefore, the oil O can be easily held on the second bottom wall portion 12a, and the oil O flowing into the second oil passage portion 12 can be prevented from leaking to the outside of the second oil passage portion 12.

The second bottom wall portion 12a has a front side portion 12aa and a rear side portion 12ab. The shape of the front side portion 12aa in the cross section orthogonal to the axial direction is a shape extending diagonally upward from the rear side portion 12ab along the outer peripheral surface of the stator core main body 32a. The rear portion 12ab is connected to the rear end of the front portion 12aa. The shape of the rear side portion 12ab in the cross section orthogonal to the axial direction is a shape extending diagonally upward from the rear end portion of the front side portion 12aa.

The second side wall portion 12b projects upward from the front edge portion of the second bottom wall portion 12a. More specifically, the second side wall portion 12b projects upward from the front edge of the front side portion 12aa. The second side wall portion 12c projects upward from the rear edge portion of the second bottom wall portion 12a. More specifically, the second side wall portion 12c projects upward from the posterior edge of the posterior portion 12ab. The upper end portion of the second side wall portion 12c is located above the upper end portion of the second side wall portion 12b. As shown in FIG. 2, the pair of second side wall portions 12b and 12c extend in the axial direction. The pair of second side wall portions 12b and 12c have a plate shape in which the plate surfaces face in the front-rear direction.

The first fixing portion 18 is provided in the second oil passage portion 12. The first fixing portion 18 is provided in a portion of the second oil passage portion 12 that is closer to the left side than the center in the axial direction. The first fixing portion 18 projects upward from the second oil passage portion 12. The rear end of the first fixing portion 18 projects rearward of the second oil passage portion 12. In the present embodiment, the first fixing portion 18 has a substantially rectangular parallelepiped shape. The first fixing portion 18 has a through hole 18a that penetrates the first fixing portion 18 in the axial direction. Although not shown, a screw to be tightened into the motor accommodating portion 81 is passed through the through hole 18a. The first fixing portion 18 is fixed to the housing 6 by a screw passed through the through hole 18a. A cylindrical metal member that opens on both sides in the axial direction may be embedded in the through hole 18a. In this case, the screw for fixing the first fixing portion 18 is passed through the metal member.

As shown in FIG. 6, the lower end portion of the first fixing portion 18 is connected across the second side wall portion 12b and the second side wall portion 12c. The first fixing portion 18 closes a part of the upper opening of the second oil passage portion 12. The lower end of the first fixing portion 18 has a portion located inside the second oil passage portion 12. A recess 18b recessed upward is provided in a portion of the first fixing portion 18 located inside the second oil passage portion 12. Therefore, it is easy to secure the internal flow path area in the portion of the second oil passage portion 12 where the first fixing portion 18 is provided.

As shown in FIGS. 3 and 4, the second oil passage portion 12 has second oil supply ports 17b and 17e for supplying oil O to the stator 30 from above. In the present embodiment, the second oil supply ports 17b and 17e are through holes that penetrate the second bottom wall portion 12a in the axial direction. The second oil supply ports 17b and 17e are provided at the connecting portion between the front side portion 12aa and the rear side portion 12ab. The second oil supply port 17b has, for example, a circular shape. The second oil supply port 17e has, for example, a rectangular shape.

The second oil supply ports 17b and 17e are located above the stator 30. More specifically, the second oil supply ports 17b and 17e are located above the stator core 32. At least a part of the oil O supplied to the second oil passage portion 12 flows out to the lower side of the second oil passage portion 12 through the second oil supply ports 17b and 17e, and is supplied to the stator core 32 from the upper side. .. In this way, in the present embodiment, the second oil supply ports 17b and 17e supply the oil O to the stator core 32 from above.

In the present embodiment, a plurality of second oil supply ports 17b are provided along the axial direction in which the second oil passage portion 12 extends. In this embodiment, for example, five second oil supply ports 17b are provided. More specifically, there are three second oil supply ports 17b in the portion of the second bottom wall portion 12a located on the right side of the first fixing portion 18, and the first fixing portion of the second bottom wall portion 12a. Two are provided in the portion located on the left side of 18. As shown in FIG. 4, the second oil supply port 17e is provided in a portion of the second bottom wall portion 12a located below the first fixing portion 18.

As shown in FIG. 3, the third oil passage portion 13A is located on the right side of the stator core 32. The third oil passage portion 13A is located above the coil end 33a. The third oil passage portion 13B is located on the left side of the stator core 32. The third oil passage portion 13B is located above the coil end 33b. In the present embodiment, the third oil passage portion 13A and the third oil passage portion 13B have substantially the same configuration except that they are arranged substantially symmetrically in the axial direction. Therefore, in the following description, only the third oil passage portion 13A may be described on behalf of the third oil passage portion 13A and the third oil passage portion 13B.

The third oil passage portion 13A has a third bottom wall portion 13Aa and a pair of third side wall portions 13Ab and 13Ac. The third bottom wall portion 13Aa extends in the front-rear direction. The third bottom wall portion 13Aa has a plate shape in which the plate surface faces in the vertical direction. The front end of the third bottom wall 13Aa is connected to the right end of the first bottom wall 11a. The rear end of the third bottom wall 13Aa is connected to the right end of the second bottom wall 12a. As shown in FIGS. 2 and 4, the central portion of the third bottom wall portion 13Aa in the front-rear direction is curved in an arc shape that is convex upward along the outer peripheral surface on the upper side of the coil end 33a. The rear end of the third bottom wall 13Aa is located below the front end of the third bottom wall 13Aa.

As shown in FIG. 2, the third side wall portion 13Ab projects upward from the axially inner (left side) edge portion of the third bottom wall portion 13Aa. The third side wall portion 13Ac projects upward from the axially outer (right side) edge of the third bottom wall portion 13Aa. The pair of third side wall portions 13Ab and 13Ac extend in the front-rear direction. The pair of third side wall portions 13Ab and 13Ac have a plate shape in which the plate surfaces face in the axial direction. The front end of the third side wall 13Ab is connected to the right end of the first side wall 11b. The rear end of the third side wall 13Ab is connected to the right end of the second side wall 12b.

The third side wall portion 13Ab has a second fixing portion 13Ad at a central portion in the front-rear direction. The second fixing portion 13Ad projects upward. The second fixing portion 13Ad has a through hole 13Ag that penetrates the second fixing portion 13Ad in the axial direction. The through hole 13Ag overlaps with the through hole 32c of the fixing portion 32b protruding upward among the fixing portions 32b when viewed along the axial direction. The through hole 32c and the through hole 13Ag are arranged concentrically. The inner diameter of the through hole 13Ag is larger than the inner diameter of the through hole 32c.

Although not shown, the second fixing portion 13Ad has a metal member embedded in the through hole 13Ag. The metal member is a cylindrical member that opens on both sides in the axial direction. A screw for fixing the stator core 32 to the motor accommodating portion 81 is passed through the inside of the metal member and the through hole 13Ag from the right side. The screw that fixes the stator core 32 to the motor accommodating portion 81 is fixed by tightening the second fixing portion 13Ad together with the stator core 32 to the motor accommodating portion 81. As described above, in the present embodiment, the first fixing portion 18 and the second fixing portion 13Ad are screwed to the motor accommodating portion 81, so that the second reservoir 10 is fixed to the housing 6. As a result, the second reservoir 10 can be firmly fixed.

The front end of the third side wall 13Ac is connected to the right end of the first side wall 11c. The rear end of the third side wall 13Ac is connected to the right end of the second side wall 12c. The front end of the third side wall 13Ac is a curved portion 13Ai that curves toward the first side wall 11c and is smoothly connected. The rear end of the third side wall portion 13Ac is a curved portion 13Aj that curves toward the second side wall portion 12c and is smoothly connected. In the present embodiment, the curved portions 13Ai and 13Aj are curved with a uniform radius of curvature when viewed along the vertical direction.

The curved portion 13Ai has a convex portion 13Ae protruding upward. Although not shown, the upper end of the convex portion 13Ae comes into contact with, for example, the upper surface of the inner wall surface of the motor accommodating portion 81. As a result, it is possible to prevent the oil O flowing into the third oil passage portion 13A from overcoming the curved portion 13Ai, and it is possible to prevent the oil O from leaking from the third oil passage portion 13A.

As shown in FIGS. 3 and 4, the third oil passage portion 13A has a third oil supply port 17c that supplies oil O to the stator 30 from above. In the present embodiment, the third oil supply port 17c is a through hole that penetrates the third bottom wall portion 13Aa in the axial direction. The third oil supply port 17c has, for example, a circular shape. The third oil supply port 17c is located above the stator 30. More specifically, the third oil supply port 17c is located above the coil end 33a. A part of the oil O supplied to the third oil passage portion 13A flows out to the lower side of the third oil passage portion 13A through the third oil supply port 17c, and is supplied to the coil end 33a from the upper side. In this way, in the present embodiment, the third oil supply port 17c supplies the oil O to the coil end 33a from above.

In the present embodiment, a plurality of third oil supply ports 17c are provided along the direction in which the third oil passage portion 13A extends, that is, in the front-rear direction. In the present embodiment, for example, six third oil supply ports 17c are provided in the third oil passage portion 13A. More specifically, the third oil passage portion 13A is provided with a total of six third oil supply ports 17c arranged in two rows in the axial direction, which are arranged at intervals in the front-rear direction.

As shown in FIG. 3, the third oil passage portion 13A has a bearing oil supply portion 13Af protruding outward (right side) in the axial direction. The bearing oil supply portion 13Af is located at the center of the third oil passage portion 13A in the front-rear direction. The bearing oil supply unit 13Af is located above the bearing 26. The bearing oil supply unit 13Af has a recessed groove portion 13Ah and a fifth oil supply port 17d. That is, the second reservoir 10 has a recessed groove portion 13Ah and a fifth oil supply port 17d. The concave groove portion 13Ah is provided on the outer edge portion in the axial direction of the upper surface of the third bottom wall portion 13Aa. The concave groove portion 13Ah is recessed downward and extends in the front-rear direction. The fifth oil supply port 17d is provided on the bottom surface of the groove portion 13Ah. The fifth oil supply port 17d is a through hole that axially penetrates the third bottom wall portion 13Aa. The fifth oil supply port 17d is located above the bearing 26. The fifth oil supply port 17d supplies the oil O in the concave groove portion 13Ah to the bearing 26 from above. Therefore, oil O can be supplied to the bearing 26 as lubricating oil via the second reservoir 10.

As shown in FIG. 2, the third oil passage portion 13B has a third bottom wall portion 13Ba and a pair of third side wall portions 13Bb and 13Bc. The third side wall portion 13Bb does not have the second fixed portion 13Ad unlike the third side wall portion 13Ab. The front end of the third side wall 13Bc is a curved portion 13Bi that is curved toward the first side wall 11c and smoothly connected. The rear end of the third side wall portion 13Bc is a curved portion 13Bj that is curved toward the second side wall portion 12c and smoothly connected. The curved portion 13Bi has a convex portion 13Be protruding upward. The upper end of the convex portion 13Be is located below the upper end of the convex portion 13Ae. Although not shown, the upper end of the convex portion 13Be comes into contact with, for example, the upper surface of the inner wall surface of the motor accommodating portion 81. As a result, it is possible to prevent the oil O flowing into the third oil passage portion 13B from overcoming the curved portion 13Bi, and it is possible to prevent the oil O from leaking from the third oil passage portion 13B.

The third oil passage portion 13B has a bearing oil supply portion 13Bf. As shown in FIG. 3, the bearing oil supply portion 13Bf has a recessed groove portion 13Bh and a fifth oil supply port 17d. The fifth oil supply port 17d of the bearing oil supply unit 13Bf supplies oil O to the bearing 27 from above. Therefore, oil O can be supplied to the bearing 27 as lubricating oil via the second reservoir 10. The third oil passage portion 13B has a plurality of third oil supply ports 17c, similarly to the third oil passage portion 13A. The third oil supply port 17c provided in the third oil passage portion 13B supplies the oil O to the coil end 33b from above.

As shown in FIGS. 2 and 3, the third oil passage portion 13B has a guide wall portion 13Bd. The guide wall portion 13Bd projects upward from the upper surface of the third bottom wall portion 13Ba. More specifically, the guide wall portion 13Bd projects upward from the axially inner (right side) edge of the concave groove portion 13Bh in the upper surface of the third bottom wall portion 13Ba. The guide wall portion 13Bd extends linearly from the curved portion 13Bi to the rear side. As shown in FIG. 3, the rear end of the guide wall portion 13Bd is located in front of the fifth oil supply port 17d of the bearing oil supply portion 13Bf. The guide wall portion 13Bd guides the oil O that has flowed into the third oil passage portion 13B from the first oil passage portion 11 to the rear side.

As shown in FIGS. 2 and 4, the support rib 16a projects downward from the first bottom wall portion 11a. In the present embodiment, a plurality of support ribs 16a are provided at intervals in the axial direction. For example, three support ribs 16a are provided. The support rib 16a has a support surface 16c that faces downward. The support surface 16c is curved along the outer peripheral surface of the stator core main body 32a and comes into contact with the outer peripheral surface of the stator core main body 32a.

The support rib 16b projects downward from the second bottom wall portion 12a. In the present embodiment, a plurality of support ribs 16b are provided at intervals in the axial direction. For example, three support ribs 16b are provided. The support rib 16b has a support surface 16d that faces downward. The support surface 16d is curved along the outer peripheral surface of the stator core main body 32a and comes into contact with the outer peripheral surface of the stator core main body 32a. As a result, the second reservoir 10 is supported on the upper side of the stator core 32 via the support ribs 16a and 16b.

As shown by the broken line arrow in FIGS. 2 and 5, the oil O supplied from the third flow path 92c to the first oil passage portion 11 via the supply port 92ca has the length of the first oil passage portion 11. It branches and flows on both sides in the direction, that is, on both sides in the axial direction. More specifically, the oil O supplied from the supply port 92ca to the flat portion 11aa flows along the inclined portions 11ab and 11ac located on both sides of the flat portion 11aa in the axial direction. Since the inclined portions 11ab and 11ac are located on the lower side as they are separated from the flat portion 11aa in the axial direction, the oil O supplied to the flat portion 11aa can be suitably flowed to both sides in the axial direction along the inclined portions 11ab and 11ac. ..

A part of the oil O supplied to the first oil passage portion 11 is supplied to the stator core 32 from above via the first oil supply port 17a. The other part of the oil O supplied to the first oil passage portion 11 flows into the third oil passage portions 13A and 13B.

A part of the oil O that has flowed into the third oil passage portions 13A and 13B is supplied to the coil ends 33a and 33b from above via the third oil supply port 17c. The other part of the oil O that has flowed into the third oil passage portions 13A and 13B flows into the recessed groove portions 13Ah and 13Bh and is supplied to the bearings 26 and 27 from above via the fifth oil supply port 17d. Still another part of the oil O that has flowed into the third oil passages 13A and 13B flows into the second oil passage 12 from both sides in the axial direction.

Here, at the right end of the second bottom wall portion 12a, an inclined surface 12d located on the lower side toward the left side is provided. Therefore, the oil O flowing into the second oil passage portion 12 from the rear end portion of the third oil passage portion 13A can flow along the inclined surface 12d. As a result, the oil O in the third oil passage portion 13A can easily flow into the second oil passage portion 12.

Further, the third oil passage portion 13B is provided with a guide wall portion 13Bd that guides the oil O that has flowed into the third oil passage portion 13B from the first oil passage portion 11 to the rear side. Therefore, the oil O that has flowed into the third oil passage portion 13B can easily flow in the front-rear direction along the third oil passage portion 13B, and the oil O can easily flow from the third oil passage portion 13B to the second oil passage portion 12.

The oil O that has flowed into the second oil passage portion 12 flows inward in the axial direction from each of the third oil passage portions 13A and 13B. The oil O that has flowed into the second oil passage portion 12 is supplied to the stator core 32 from above via the second oil supply ports 17b and 17e.

The oil O supplied from the second reservoir 10 to the stator 30 and the bearings 26 and 27 is dropped downward and accumulated in the lower region in the motor accommodating portion 81. The oil O accumulated in the lower region in the motor accommodating portion 81 moves to the gear accommodating portion 82 through the partition wall opening 68 provided in the partition wall 61c. As described above, the second oil passage 92 supplies the oil O to the stator 30 and the bearings 26 and 27.

According to the present embodiment, the second reservoir 10 has a first oil passage portion 11 and a second oil passage portion 12 arranged so as to sandwich the motor shaft J1 when viewed along the vertical direction. The first oil passage portion 11 has a first oil supply port 17a for supplying oil O to the stator 30 from above, and the second oil passage portion 12 has a second oil supply port 17b for supplying oil O to the stator 30 from above. , 17e. Therefore, the oil O can be suitably supplied to both side portions of the stator 30 in the front-rear direction via the first oil supply port 17a and the second oil supply ports 17b and 17e. As a result, the stator 30 can be suitably cooled. Therefore, according to this embodiment, the cooling efficiency of the stator 30 can be improved.

Further, the second reservoir 10 has third oil passage portions 13A and 13B connecting the first oil passage portion 11 and the second oil passage portion 12. Therefore, regardless of whether the oil O is supplied to the second reservoir 10 from any of the first oil passage portion 11, the second oil passage portion 12, and the third oil passage portions 13A and 13B, the oil O is first supplied. It can flow into the oil passage portion 11 and the second oil passage portion 12. In the present embodiment, the oil O supplied to the first oil passage portion 11 can be flowed to the second oil passage portion 12 via the third oil passage portions 13A and 13B. As a result, the oil O is supplied to the stator 30 from the first oil supply port 17a and the second oil supply ports 17b and 17e without separately supplying the oil O to the first oil passage portion 11 and the second oil passage portion 12. Can be supplied. Therefore, it is possible to prevent the second oil passage 92 from becoming complicated.

Further, according to the present embodiment, the first oil supply port 17a and the second oil supply ports 17b, 17e supply the oil O to the stator core 32 from above. Therefore, the stator core 32 can be suitably cooled via the first oil supply port 17a and the second oil supply ports 17b and 17e.

Further, according to the present embodiment, a plurality of first oil supply ports 17a are provided along the axial direction in which the first oil passage portion 11 extends, and the second oil supply ports 17b and 17e are provided in the second oil passage portion 12 A plurality of oils are provided along the axial direction in which the oils extend. Therefore, the oil O can be supplied to a plurality of locations along the axial direction of the stator 30 via the plurality of first oil supply ports 17a and the plurality of second oil supply ports 17b and 17e. As a result, the oil O can be supplied to the stator 30 in a wide range along the axial direction. Therefore, it is easy to cool the entire stator 30, and the cooling efficiency of the stator 30 can be further improved.

Further, according to the present embodiment, the third oil passage portions 13A and 13B have a third oil supply port 17c that supplies oil O to the coil ends 33a and 33b from above. Therefore, the oil O supplied to the second reservoir 10 can be supplied to the coil ends 33a and 33b. As a result, the stator 30 can be cooled more preferably, and the cooling efficiency of the stator 30 can be further improved.

Further, according to the present embodiment, a plurality of third oil supply ports 17c are provided along the front-rear direction in which the third oil passage portions 13A and 13B extend. Therefore, the oil O can be supplied to a plurality of coil ends 33a and 33b along the front-rear direction through the plurality of third oil supply ports 17c. As a result, the oil O can be supplied to the coil ends 33a and 33b in a wide range along the front-rear direction. Therefore, it is easy to cool the entire coil ends 33a and 33b, and the cooling efficiency of the stator 30 can be further improved.

Further, according to the present embodiment, the second reservoir 10 has a pair of third oil passage portions 13A and 13B arranged at intervals in the axial direction. Therefore, the oil O can be easily moved between the first oil passage portion 11 and the second oil passage portion 12 via the pair of third oil passage portions 13A and 13B. As a result, when the oil O is supplied to the first oil passage portion 11 as in the present embodiment, the oil O can easily flow into the second oil passage portion 12 from the first oil passage portion 11. Therefore, the oil O can be more preferably supplied to the stator 30 from the first oil supply port 17a of the first oil passage portion 11 and the second oil supply ports 17b and 17e of the second oil passage portion 12. Therefore, the cooling efficiency of the stator 30 can be further improved.

Further, the third oil passage portion 13A connects the right end portion of the first oil passage portion 11 and the right end portion of the second oil passage portion 12, and the third oil passage portion 13B is the first oil passage portion. The left end of the 11 and the left end of the second oil passage 12 are connected. Therefore, the shape of the second reservoir 10 can be made into a substantially rectangular frame shape. As a result, the oil O in the first oil passage portion 11 can be easily flowed into the second oil passage portion 12, and the oil O can be easily flowed in the entire second reservoir 10.

(Modified example of the first embodiment)
As shown in FIG. 7, in the second reservoir 210 of the motor 202 of this modified example, the third side wall portion 213Ab of the third oil passage portion 213A has the second fixed portion 13Ad unlike the third side wall portion 13Ab described above. I don't have it. The third side wall portion 213Ab has a recessed portion 213Ag that is recessed downward. The recess 213Ag penetrates the third side wall portion 213Ab in the axial direction. The inner edge of the recess 213Ag has an arc shape that is concave downward when viewed along the axial direction. The recess 213Ag is provided at the center of the third side wall portion 213Ab in the front-rear direction. The inside of the recess 213Ag overlaps with the through hole 32c when viewed along the axial direction.

The third bottom wall portion 213Aa has a first portion 213Ap, a second portion 213Aq, and a third portion 213Ar. The first portion 213Ap, the second portion 213Aq, and the third portion 213Ar are arranged in this order from the front side to the rear side. The first portion 213Ap is a portion connected to the first bottom wall portion 11a. As shown in FIG. 8, the first portion 213Ap has a plate shape extending rearward from the right end portion of the first bottom wall portion 11a. The upper surface of the first portion 213Ap is a flat surface orthogonal to the vertical direction.

The second portion 213Aq is connected to the first portion 213Ap. The second portion 213Aq has a plate shape extending from the rear end portion of the first portion 213Ap to the rear side. Here, the flow direction of the oil O in the third oil passage portion 213A is the front-rear direction, and the oil O flows from the front side to the rear side in the third oil passage portion 213A. That is, in the direction in which the oil O flows in the third oil passage portion 213A, the front side is the upstream side and the rear side is the downstream side. Therefore, in the present embodiment, the second portion 213Aq is connected to the downstream side of the first portion 213Ap in the flow direction of the oil O in the third oil passage portion 213A.

The second portion 213Aq is curved along the outer peripheral surface of the coil end 33a on the upper side of the coil end 33a. The upper surface of the second portion 213Aq is an arcuate curved surface along the outer peripheral surface of the coil end 33a. The front portion of the second portion 213Aq is a connecting portion 213As connected to the first portion 213Ap, and is located on the upper side from the first portion 213Ap toward the rear side. That is, the portion of the second portion 213Aq connected to the first portion 213Ap is located on the upper side toward the downstream side in the flow direction of the oil O. The rear portion of the second portion 213Aq is located on the lower side toward the rear side.

The third portion 213Ar has a plate shape extending from the rear end portion of the second portion 213Aq to the rear side. The upper surface of the third portion 213Ar is a flat surface orthogonal to the vertical direction. The third portion 213Ar is located below the first portion 213Ap.

As shown in FIG. 7, in the present modification, the third oil passage portion 213A has a circular supply port 217c and an extension supply port 217f as the third oil supply port. The circular supply port 217c has a circular shape like the third oil supply port 17c described above. Two circular supply ports 217c are provided in each of the first portion 213Ap and the second portion 213Aq. The two circular supply ports 217c provided in the first portion 213Ap are arranged side by side in the axial direction. The two circular supply ports 217c provided in the second portion 213Aq are arranged side by side in the axial direction.

The extension supply port 217f extends along the front-rear direction in which the third oil passage portion 213A extends. The extension supply port 217f penetrates the third bottom wall portion 213Aa in the vertical direction. The extension supply port 217f is, for example, a rectangular hole long in the front-rear direction. In this modification, the stretch supply port 217f is located at the same position in the front-rear direction as the fixing portion 32b protruding upward from the fixing portion 32b. The stretch supply port 217f is provided so as to straddle the first portion 213Ap and the second portion 213Aq. The extension supply port 217f is located between the two circular supply ports 217c provided in the first portion 213Ap and the two circular supply ports 217c provided in the second portion 213Aq in the front-rear direction.

The opening area of the stretched supply port 217f is larger than the opening area of the circular supply port 217c. The axial dimension of the stretch supply port 217f is at least twice the inner diameter of the circular supply port 217c. The size of the stretched supply port 217f in the front-rear direction is four times or more the inner diameter of the circular supply port 217c. As shown in FIG. 8, the rear end of the stretch supply port 217f is located at the rear end of the connecting portion 213As. In other words, the rear end of the stretch supply port 217f is located at the uppermost portion of the third bottom wall portion 213Aa. The extension supply port 217f is located on the front side of the protruding wall portion 81b provided in the motor accommodating portion 81, that is, on the upstream side in the oil O flow direction in the third oil passage portion 213A.

The protruding wall portion 81b is provided on an upper portion of the inner side surface of the motor accommodating portion 81. The protruding wall portion 81b is a wall portion that protrudes downward. Although not shown, the protruding wall portion 81b extends in the axial direction. The protruding wall portion 81b has a portion located above the third oil passage portion 213A. More specifically, the protruding wall portion 81b is located above the rear portion of the second portion 213Aq. The protruding wall portion 81b faces the rear portion of the second portion 213Aq in the vertical direction through a gap.

In the portion where the protruding wall portion 81b is provided, the axial gap between the motor accommodating portion 81 and the second reservoir 210 is narrowed. Therefore, a part of the oil O is blocked by the protruding wall portion 81b, and the oil O becomes difficult to flow in the portion of the third oil passage portion 213A facing the protruding wall portion 81b. The oil O blocked by the protruding wall portion 81b may overflow from the third oil passage portion 213A on both sides in the axial direction and may be difficult to be supplied to the stator 30. Therefore, a part of the oil O supplied to the second reservoir 210 may not be supplied to the stator 30, and the cooling efficiency of the stator 30 may decrease.

On the other hand, according to the present modification, the extension supply port 217f is located upstream of the protruding wall portion 81b in the flow direction of the oil O in the third oil passage portion 213A. The extension supply port 217f extends along the direction in which the third oil passage portion 213A extends. Therefore, as shown in FIG. 8, a relatively large amount of oil O among the oil O flowing in the third oil passage portion 213A is pushed downward through the extension supply port 217f before flowing to the position of the protruding wall portion 81b. It can be drained and supplied to the coil end 33a. As a result, the amount of oil O flowing downstream of the stretch supply port 217f can be relatively small. Therefore, the flow rate of the oil O flowing into the portion of the third oil passage portion 213A located below the protruding wall portion 81b can be relatively reduced. Therefore, the oil O flowing in the third oil passage portion 213A is less likely to be blocked by the protruding wall portion 81b, and it is possible to prevent the oil O from overflowing on both sides of the third oil passage portion 213A in the axial direction. As a result, it is possible to prevent a part of the oil O supplied to the second reservoir 210 from being supplied to the stator 30, and it is possible to prevent the cooling efficiency of the stator 30 from being lowered.

Further, since it is possible to prevent the oil O from being blocked by the protruding wall portion 81b, it is easy to smooth the flow of the oil O flowing from the third oil passage portion 213A to the second oil passage portion 12. As a result, the oil O can be easily flowed from the third oil passage portion 213A to the second oil passage portion 12. Therefore, the oil O can be suitably supplied to the stator core 32 through the second oil supply ports 17b and 17e provided in the second oil passage portion 12.

In this modification, the connecting portion 213As connected to the first portion 213Ap of the second portion 213Aq is located on the upper side toward the downstream side in the flow direction of the oil O. Therefore, the oil O flowing from the first portion 213Ap to the second portion 213Aq needs to overcome the connecting portion 213As connected to the first portion 213Ap of the second portion 213Aq. Therefore, the oil O may receive resistance from the connecting portion 213As to the front side, and the flow of the oil O in the third oil passage portion 213A may be obstructed.

On the other hand, according to this modification, the stretch supply port 217f is provided so as to straddle the first portion 213Ap and the second portion 213Aq. Therefore, a part of the extension supply port 217f is provided in a part of the connecting portion 213As connected to the first portion 213Ap in the second portion 213Aq. As a result, the resistance received by the oil O from the connecting portion 213As can be reduced. Therefore, it is possible to prevent the flow of oil O in the third oil passage portion 213A from being obstructed.

Further, the portion of the extension supply port 217f provided at the connection portion 213As is located on the upper side toward the downstream side in the flow direction of the oil O. Therefore, the oil O flowing from the upper side of the first portion 213Ap to the downstream side tends to flow out from the portion of the extension supply port 217f provided in the connection portion 213As. Therefore, it is easy to preferably increase the amount of oil O flowing out from the extension supply port 217f, and it is possible to further suppress the oil O from being blocked by the protruding wall portion 81b.

The third oil passage portion 213B has the same configuration as the third oil passage portion 213A except that it is symmetrical in the axial direction. The third oil passage portion 213B has a stretch supply port 217 g as a third oil supply port. The structure of the stretch supply port 217g is the same as that of the stretch supply port 217f except that it is provided on the third bottom wall portion 213Ba of the third oil passage portion 213B.

If the extension supply port 217f provided in the third oil passage portion 213A is located on the upstream side of the protruding wall portion 81b, it may not be provided across the first portion 213Ap and the second portion 213Aq. Good. The entire extension supply port 217f may be provided in the first portion 213Ap. The same applies to the extension supply port 217g provided in the third oil passage portion 213B.

Further, the third oil passage portions 213A and 213B may be provided with a plurality of extension supply ports 217f and 217g. The shape of the extension supply ports 217f and 217g is not particularly limited as long as the third oil passage portions 213A and 213B extend along the extending direction. The stretch supply ports 217f and 217g may have an elliptical shape, an oval shape, or a polygonal shape other than a quadrangular shape. Either one of the stretch supply ports 217f and 217g may not be provided.

<Second Embodiment>
As shown in FIGS. 9 to 11, in the motor 102 of the present embodiment, the second reservoir 110 includes a first oil passage portion 111, a second oil passage portion 112, a third oil passage portion 113, and a support rib. It has 118a, 118b, and 118c. In the present embodiment, the third oil passage portion 113 includes a fourth oil passage portion 114, a fifth oil passage portion 115, and a sixth oil passage portion 116. The first oil passage portion 111, the second oil passage portion 112, and the fourth oil passage portion 114 have a gutter shape that opens upward and extends in the axial direction. The fifth oil passage portion 115 and the sixth oil passage portion 116 have a gutter shape that opens upward and extends in the front-rear direction.

The fourth oil passage portion 114 is located between the first oil passage portion 111 and the second oil passage portion 112 when viewed along the vertical direction. In the present embodiment, the fourth oil passage portion 114 overlaps with the motor shaft J1 when viewed along the vertical direction. The fifth oil passage portion 115 connects the right end portion of the fourth oil passage portion 114 and the right end portion of the first oil passage portion 111. The sixth oil passage portion 116 connects the right end portion of the fourth oil passage portion 114 and the right end portion of the second oil passage portion 112. In the present embodiment, the second reservoir 110 is E-shaped when viewed along the vertical direction.

The first oil passage portion 111 is located so as to straddle the upper side of the stator core 32 and the coil ends 33a and 33b. More specifically, the ends of the first oil passage portion 111 on both sides in the axial direction are located above the coil ends 33a and 33b, respectively. The portion of the first oil passage portion 111 excluding the ends on both sides in the axial direction is located above the stator core 32. The first oil passage portion 111 includes a first bottom wall portion 111a, a pair of first side wall portions 111b and 111c, a closed wall portion 111d and 111e, and an insertion portion 111f.

The first bottom wall portion 111a has a plate shape extending in the axial direction and having a plate surface facing in the vertical direction. The upper surface of the first bottom wall portion 111a is a flat surface. The first side wall portion 111b projects upward from the rear edge portion of the first bottom wall portion 111a. The first side wall portion 111c projects upward from the front edge portion of the first bottom wall portion 111a. The pair of first side wall portions 111b, 111c extend in the axial direction. The pair of first side wall portions 111b and 111c have a plate shape in which the plate surfaces face in the front-rear direction. As shown in FIG. 12, the upper end portion of the first side wall portion 111b is located above the upper end portion of the first side wall portion 111c.

As shown in FIG. 9, the closing wall portion 111d closes the left end portion of the first oil passage portion 111. The closed wall portion 111d has a plate shape in which the plate surface faces the axial direction. The closed wall portion 111d extends upward from the left end portion of the first bottom wall portion 111a. The closed wall portion 111d connects the left end portion of the first side wall portion 111b and the left end portion of the first side wall portion 111c. The closing wall portion 111e closes the right end of the first oil passage portion 111. The closed wall portion 111e has a plate shape in which the plate surface faces the axial direction. The closed wall portion 111e extends upward from the right end of the first bottom wall portion 111a. The closed wall portion 111e connects the right end portion of the first side wall portion 111c and the front end portion of the fifth side wall portion 115c described later.

The insertion portion 111f projects to the left from the upper end of the closed wall portion 111d. The insertion portion 111f has a plate shape in which the plate surface faces in the vertical direction. Although not shown, the insertion portion 111f is inserted into a recess provided on the inner wall surface of the motor accommodating portion 81.

As shown in FIG. 10, the first oil passage portion 111 has a first oil supply port 117a that supplies oil O to the stator 30 from above. The plurality of first oil supply ports 117a are provided on the first bottom wall portion 111a. As shown in FIG. 12, the first oil supply port 117a has a recess 117f and a hole 117g. The recess 117f is recessed downward from the upper surface of the first bottom wall portion 111a. The recess 117f is formed, for example, by plastically deforming a part of the plate-shaped first bottom wall portion 111a downward by press working or the like. Therefore, a convex portion 117e projecting downward is provided on the lower surface of the portion of the first bottom wall portion 111a where the concave portion 117f is provided. The hole portion 117g is provided on the bottom surface of the recess 117f. The hole portion 117g penetrates the first bottom wall portion 111a in the vertical direction. The hole portion 117g opens on the lower surface of the convex portion 117e.

As shown in FIG. 10, a plurality of first oil supply ports 117a are provided in the present embodiment along the axial direction in which the first oil passage portion 111 extends. For example, four first oil supply ports 117a are provided. Of the four first oil supply ports 117a, two first oil supply ports 117a are provided at both ends in the axial direction of the first bottom wall portion 111a, and are located above the coil ends 33a and 33b, respectively. Therefore, the two first oil supply ports 117a provided at the ends of the first bottom wall portion 111a on both sides in the axial direction supply the oil O to the coil ends 33a and 33b from above. Of the four first oil supply ports 117a, the other two first oil supply ports 117a are located above the stator core 32 and supply oil O to the stator core 32 from above.

The second oil passage portion 112 is located so as to straddle the upper side of the stator core 32 and the coil ends 33a and 33b. More specifically, the ends of the second oil passage portion 112 on both sides in the axial direction are located above the coil ends 33a and 33b, respectively. The portion of the second oil passage portion 112 excluding the ends on both sides in the axial direction is located above the stator core 32. The second oil passage portion 112 has a second bottom wall portion 112a, a pair of second side wall portions 112b and 112c, a closed wall portion 112d and 112e, and an insertion portion 112f. The second bottom wall portion 112a has a plate shape extending in the axial direction and having a plate surface facing in the vertical direction. The upper surface of the second bottom wall portion 112a is a flat surface. As shown in FIG. 12, the second bottom wall portion 112a is located above the first bottom wall portion 111a. The dimensions of the second bottom wall portion 112a in the front-rear direction are, for example, the same as the dimensions of the first bottom wall portion 111a in the front-rear direction.

The second side wall portion 112b projects upward from the front edge portion of the second bottom wall portion 112a. The second side wall portion 112c projects upward from the rear edge portion of the second bottom wall portion 112a. As shown in FIG. 9, the pair of second side wall portions 112b and 112c extend in the axial direction. The pair of second side wall portions 112b and 112c have a plate shape in which the plate surfaces face in the front-rear direction. As shown in FIG. 12, the upper end portion of the second side wall portion 112b is located above the upper end portion of the second side wall portion 112c. The upper end portion of the second side wall portions 112b, 112c is located above the upper end portion of the first side wall portions 111b, 111c.

As shown in FIG. 9, the closing wall portion 112d closes the left end of the second oil passage portion 112. The closed wall portion 112d has a plate shape in which the plate surface faces the axial direction. The closed wall portion 112d extends upward from the left end of the second bottom wall portion 112a. The closed wall portion 112d connects the left end portion of the second side wall portion 112b and the left end portion of the second side wall portion 112c. The closing wall portion 112e closes the right end of the second oil passage portion 112. The closed wall portion 112e has a plate shape in which the plate surface faces the axial direction. The closed wall portion 112e extends upward from the right end of the second bottom wall portion 112a. The closed wall portion 112e connects the right end portion of the second side wall portion 112c and the rear end portion of the sixth side wall portion 116c described later.

The insertion portion 112f projects to the left from the upper end of the closed wall portion 112d. The insertion portion 112f has a plate shape in which the plate surface faces in the vertical direction. Although not shown, the insertion portion 112f is inserted into a recess provided on the inner wall surface of the motor accommodating portion 81.

As shown in FIG. 10, the second oil passage portion 112 has a second oil supply port 117b that supplies oil O to the stator 30 from above. The second oil supply port 117b is provided on the second bottom wall portion 112a. The second oil supply port 117b has the same shape as the first oil supply port 117a. In the present embodiment, a plurality of second oil supply ports 117b are provided along the axial direction in which the second oil passage portion 112 extends. For example, four second oil supply ports 117b are provided. Of the four second oil supply ports 117b, two second oil supply ports 117b are provided at both ends in the axial direction of the second bottom wall portion 112a, and are located above the coil ends 33a and 33b, respectively. Therefore, the two second oil supply ports 117b provided at the ends of the second bottom wall portion 112a on both sides in the axial direction supply the oil O to the coil ends 33a and 33b from above. Of the four second oil supply ports 117b, the other two second oil supply ports 117b are located above the stator core 32 and supply oil O to the stator core 32 from above.

The fourth oil passage portion 114 is located so as to straddle the upper side of the stator core 32 and the coil ends 33a and 33b. More specifically, the ends of the fourth oil passage portion 114 on both sides in the axial direction are located above the coil ends 33a and 33b, respectively. The portion of the fourth oil passage portion 114 excluding the ends on both sides in the axial direction is located above the stator core 32. The fourth oil passage portion 114 includes a fourth bottom wall portion 114a, a pair of fourth side wall portions 114b and 114c, closed wall portions 114d and 114e, an insertion portion 114f, and a partition wall portion 114i.

The fourth bottom wall portion 114a extends in the axial direction. The fourth bottom wall portion 114a has a plate shape in which the plate surface faces in the vertical direction. The upper surface of the fourth bottom wall portion 114a is a flat surface. As shown in FIG. 12, the fourth bottom wall portion 114a is located above the first bottom wall portion 111a and the second bottom wall portion 112a. The dimensions of the fourth bottom wall portion 114a in the front-rear direction are larger than the dimensions of the first bottom wall portion 111a in the front-rear direction and the dimensions of the second bottom wall portion 112a in the front-rear direction.

As shown in FIG. 9, the fourth side wall portion 114b projects upward from the rear edge portion of the fourth bottom wall portion 114a. The fourth side wall portion 114c projects upward from the front edge portion of the fourth bottom wall portion 114a. The pair of fourth side wall portions 114b, 114c extend in the axial direction. The pair of fourth side wall portions 114b and 114c have a plate shape in which the plate surfaces face in the front-rear direction. As shown in FIG. 12, the upper end portion of the fourth side wall portion 114b and the upper end portion of the fourth side wall portion 114c are located at the same position in the axial direction. The upper end portions of the fourth side wall portions 114b and 114c are located above the first side wall portions 111b and 111c and the second side wall portions 112b and 112c.

As shown in FIG. 9, the closing wall portion 114d closes the left end of the fourth oil passage portion 114. The closed wall portion 114d has a plate shape in which the plate surface faces the axial direction. The closed wall portion 114d extends upward from the left end of the fourth bottom wall portion 114a. The closed wall portion 114d connects the left end portion of the fourth side wall portion 114b and the left end portion of the fourth side wall portion 114c. The closed wall portion 114d has a recess 114h that is recessed downward from the upper end portion of the closed wall portion 114d. As shown in FIG. 12, the inner edge of the recess 114h has an arc shape that is recessed downward when viewed along the axial direction.

The supply port 192ca of the third flow path 192c is connected to the closed wall portion 114d. In the present embodiment, the supply port 192ca opens to the right side in the axial direction. The lower end of the supply port 192ca opens inside the fourth oil passage 114 through the recess 114h. The oil O discharged to the right from the supply port 192ca of the third flow path 192c is supplied to the fourth oil passage portion 114. That is, in the present embodiment, the third flow path 192c corresponds to the supply oil passage for supplying the oil O to the second reservoir 110, and supplies the oil O to the fourth oil passage portion 114. More specifically, the third flow path 192c supplies the oil O to the left end of the fourth oil passage 114.

As shown in FIG. 9, the closing wall portion 114e closes the right end of the fourth oil passage portion 114. The closed wall portion 114e has a plate shape in which the plate surface faces the axial direction. The closed wall portion 114e extends upward from the right end of the fourth bottom wall portion 114a. The closed wall portion 114e connects the rear end portion of the fifth side wall portion 115c described later and the front end portion of the sixth side wall portion 116c described later.

The insertion portion 114f projects to the left from the lower end of the closed wall portion 114d. The insertion portion 114f has a plate shape with the plate surface facing in the vertical direction. Although not shown, the insertion portion 114f is inserted into a recess provided on the inner wall surface of the motor accommodating portion 81. In this way, the insertion portions 111f, 112f, 114f are inserted into the recesses provided on the inner wall surface of the motor accommodating portion 81, so that the left end portion of the second reservoir 110 can be supported by the housing 6. it can. Therefore, the second reservoir 110 can be stably held above the stator 30.

The partition wall portion 114i projects upward from the central portion in the front-rear direction of the fourth bottom wall portion 114a. The partition wall portion 114i has a plate shape in which the plate surface faces the front-rear direction. The partition wall portion 114i extends in the axial direction. More specifically, the partition wall portion 114i extends linearly in the axial direction from a position distant from the closed wall portion 114d to the right side to the closed wall portion 114e. As shown in FIG. 12, the upper end portion of the partition wall portion 114i is located below the upper end portion of the fourth side wall portions 114b and 114c. The upper end of the partition wall portion 114i is located above the lower end of the inner edge of the recess 114h.

As shown in FIG. 9, the left end portion of the upper edge portion of the partition wall portion 114i is an inclined portion located on the lower side toward the left side. That is, the left end portion of the partition wall portion 114i is a portion in which the height of protrusion from the fourth bottom wall portion 114a decreases toward the left side. The partition wall portion 114i partitions the inside of the portion of the fourth oil passage portion 114 located on the right side of the left end portion to which the oil O is supplied in the front-rear direction orthogonal to both the axial direction and the vertical direction.

In the following description, of the portion of the fourth oil passage portion 114 partitioned by the partition wall portion 114i, the portion located on the front side is referred to as the front side oil passage portion 114j. Further, a portion of the fourth oil passage portion 114 partitioned by the partition wall portion 114i, which is located on the rear side, is referred to as a rear oil passage portion 114k. The front-rear dimension of the front oil passage portion 114j and the front-rear dimension of the rear oil passage portion 114k are, for example, the same as each other. The anteroposterior dimension of the front oil passage portion 114j and the anteroposterior dimension of the rear oil passage portion 114k are, for example, the anteroposterior dimension of the first oil passage portion 111 and the front-rear dimension of the second oil passage portion 112. Is the same as.

As shown in FIG. 10, the fourth oil passage portion 114 has a third oil supply port 117c and a fourth oil supply port 117d. That is, the third oil passage portion 113 has a third oil supply port 117c and a fourth oil supply port 117d. The third oil supply port 117c and the fourth oil supply port 117d are provided on the fourth bottom wall portion 114a. The third oil supply port 117c and the fourth oil supply port 117d have the same shape as the first oil supply port 117a.

In this embodiment, a plurality of third oil supply ports 117c are provided. For example, three third oil supply ports 117c are provided. More specifically, there is one third oil supply port 117c in the portion of the fourth bottom wall portion 114a located on the left side of the partition wall portion 114i, and the third oil supply port 117c on the right side of the fourth bottom wall portion 114a of the front oil passage portion 114j. One is provided at the end and one is provided at the right end of the fourth bottom wall 114a of the rear oil passage 114k. The third oil supply port 117c provided on the left side of the partition wall portion 114i is located above the coil end 33b, and supplies oil O to the coil end 33b from above. The third oil supply port 117c provided in the front oil passage portion 114j and the third oil supply port 117c provided in the rear oil passage portion 114k are located above the coil end 33a and oil from above to the coil end 33a. Supply O.

The fourth oil supply port 117d is located above the stator core 32, and supplies oil O to the stator core 32 from above. In this embodiment, a plurality of fourth oil supply ports 117d are provided. For example, four fourth oil supply ports 117d are provided. More specifically, the fourth oil supply port 117d is provided on the fourth bottom wall portion 114a of the front oil passage portion 114j and two on the fourth bottom wall portion 114a of the rear oil passage portion 114k, respectively. .. The two fourth oil supply ports 117d provided in the front oil passage portion 114j are arranged at intervals along the axial direction in which the front oil passage portion 114j extends. The two fourth oil supply ports 117d provided in the rear oil passage portion 114k are arranged at intervals along the axial direction in which the rear oil passage portion 114k extends.

One of the fourth oil supply ports 117d provided in the front oil passage portion 114j and one of the fourth oil supply ports 117d provided in the rear oil passage portion 114k are located at the same positions in the axial direction. And is arranged at the same position in the axial direction as one of the first oil supply port 117a and one of the second oil supply port 117b. The other one of the fourth oil supply port 117d provided in the front oil passage portion 114j and the other one of the fourth oil supply port 117d provided in the rear oil passage portion 114k are in the axial direction. Are arranged at the same position with each other, and are arranged at the same position in the axial direction with the other one of the first oil supply port 117a and the other one of the second oil supply port 117b.

In the present embodiment, the fifth oil passage portion 115 extends from the right end portion of the front oil passage portion 114j to the right end portion of the first oil passage portion 111. The fifth oil passage portion 115 is located above the coil end 33a. The fifth oil passage portion 115 is located on the outer side (right side) in the axial direction with respect to the stator core 32. The axial dimensions of the fifth oil passage portion 115 are the front-rear dimension of the first oil passage portion 111, the front-rear dimension of the second oil passage portion 112, the front-rear dimension of the front oil passage portion 114j, and the rear. It is larger than the size of the side oil passage portion 114k in the front-rear direction.

The fifth oil passage portion 115 has a fifth bottom wall portion 115a and a pair of fifth side wall portions 115b and 115c. The fifth bottom wall portion 115a extends in the front-rear direction. The fifth bottom wall portion 115a has a plate shape in which the plate surface faces in the vertical direction. The rear end of the fifth bottom wall 115a is connected to the right end of the fourth bottom wall 114a in the front oil passage 114j. The front end of the fifth bottom wall 115a is connected to the right end of the first bottom wall 111a. As shown in FIG. 9, the upper surface of the fifth bottom wall portion 115a is an inclined surface located on the lower side from the front oil passage portion 114j toward the front side. The axial dimension of the fifth bottom wall portion 115a is larger than the front-rear dimension of the first bottom wall portion 111a and the front-rear dimension of the second bottom wall portion 112a.

The fifth side wall portion 115b projects upward from the axially inner (left side) edge of the fifth bottom wall portion 115a. The fifth side wall portion 115c projects upward from the axially outer (right side) edge of the fifth bottom wall portion 115a. The pair of fifth side wall portions 115b and 115c extend in a direction slightly obliquely inclined in the vertical direction with respect to the front-rear direction. More specifically, the pair of fifth side wall portions 115b, 115c extend toward the lower side toward the front side. The pair of fifth side wall portions 115b and 115c have a plate shape in which the plate surfaces face in the axial direction. The fifth side wall portion 115b connects the right end portion of the fourth side wall portion 114c and the right end portion of the first side wall portion 111b. The fifth side wall portion 115c connects the front end portion of the closing wall portion 114e and the rear end portion of the closing wall portion 111e.

A third fixing portion 115d is provided on the fifth side wall portion 115b. The third fixing portion 115d projects upward from the front end portion of the fifth side wall portion 115b. The third fixed portion 115d has a pair of pillar portions 115e and 115f arranged at intervals in the front-rear direction. The pair of pillar portions 115e and 115f have recesses that open on the side where the other pillar portion is located. The washer 100 is held by the third fixing portion 115d. The washer 100 is held by fitting the edges on both sides in the front-rear direction into the recesses of the pillar portions 115e and 115f. A screw for fixing the washer 100 to the housing 6 is passed through the washer 100. As a result, the third fixing portion 115d is fixed to the housing 6 via the washer 100.

In the present embodiment, the sixth oil passage portion 116 extends from the right end portion of the rear oil passage portion 114k to the right end portion of the second oil passage portion 112. The sixth oil passage portion 116 is located above the coil end 33a. The axial dimensions of the sixth oil passage 116 are the front-rear dimension of the first oil passage 111, the front-rear dimension of the second oil passage 112, the front-rear dimension of the front oil passage 114j, and the rear. It is larger than the size of the side oil passage portion 114k in the front-rear direction. The axial dimension of the sixth oil passage portion 116 is, for example, the same as the axial dimension of the fifth oil passage portion 115.

The sixth oil passage portion 116 has a sixth bottom wall portion 116a and a pair of sixth side wall portions 116b and 116c. The sixth bottom wall portion 116a has a plate shape extending in the front-rear direction and having a plate surface facing in the vertical direction. The front end of the sixth bottom wall 116a is connected to the right end of the fourth bottom wall 114a in the rear oil passage 114k. The rear end of the sixth bottom wall 116a is connected to the right end of the second bottom wall 112a. As shown in FIG. 9, the upper surface of the sixth bottom wall portion 116a is an inclined surface located on the lower side from the rear oil passage portion 114k toward the rear side. The axial dimension of the sixth bottom wall portion 116a is larger than the front-rear dimension of the first bottom wall portion 111a and the front-rear dimension of the second bottom wall portion 112a. The axial dimension of the sixth bottom wall portion 116a is, for example, the same as the axial dimension of the fifth bottom wall portion 115a.

The sixth side wall portion 116b projects upward from the axially inner (left side) edge of the sixth bottom wall portion 116a. The sixth side wall portion 116c projects upward from the axially outer (right side) edge of the sixth bottom wall portion 116a. The pair of sixth side wall portions 116b, 116c extend in a direction slightly obliquely inclined in the vertical direction with respect to the front-rear direction. More specifically, the pair of sixth side wall portions 116b, 116c extend toward the lower side toward the rear side. The pair of sixth side wall portions 116b and 116c have a plate shape in which the plate surfaces face in the axial direction. The sixth side wall 116b connects the right end of the fourth side wall 114b and the right end of the second side wall 112b. The sixth side wall portion 116c connects the rear end portion of the closing wall portion 114e and the front end portion of the closing wall portion 112e.

A fourth fixed portion 116d is provided on the sixth side wall portion 116b. The fourth fixed portion 116d projects upward from the front end of the sixth side wall portion 116b. The fourth fixed portion 116d has the same shape as the third fixed portion 115d. The fourth fixed portion 116d has a pair of pillar portions 116e and 116f for holding the washer 100. The second reservoir 110 of the present embodiment is fixed to the housing 6 by being screwed to the housing 6 via the third fixing portion 115d and the fourth fixing portion 116d. Therefore, the second reservoir 110 can be stably fixed to the housing 6.

As shown in FIG. 11, the support rib 118a projects downward from the first bottom wall portion 111a. Two support ribs 118a are provided, for example, at intervals in the axial direction. The support rib 118b projects downward from the second bottom wall portion 112a. Two support ribs 118b are provided, for example, at intervals in the axial direction. The support rib 118c projects downward from the fourth bottom wall portion 114a. For example, four support ribs 118c are provided. More specifically, the support ribs 118c are provided with two sets of a pair of support ribs 118c arranged at intervals in the front-rear direction and at intervals in the axial direction. As shown in FIG. 12, the support ribs 118a, 118b, 118c come into contact with the outer peripheral surface of the stator core main body 32a. As a result, the second reservoir 110 is supported on the upper side of the stator core 32 via the support ribs 118a, 118b, 118c.

As shown by the broken line arrow in FIG. 9, the oil O supplied from the third flow path 192c to the left end of the fourth oil passage portion 114 via the supply port 192ca is the front side oil passage portion 114j and the rear oil passage portion 114j. It branches to the side oil passage portion 114k and flows to the right along the axial direction. A part of the oil O supplied to the fourth oil passage portion 114 is supplied to the coil ends 33a and 33b from above via the third oil supply port 117c. The other part of the oil O supplied to the fourth oil passage portion 114 is supplied to the stator core 32 from above via the fourth oil supply port 117d. Still another part of the oil O supplied to the fourth oil passage 114 flows into the fifth oil passage 115 and the sixth oil passage 116.

Oil O flows into the fifth oil passage portion 115 from the front oil passage portion 114j. The oil O that has flowed into the fifth oil passage portion 115 flows forward along the fifth oil passage portion 115 and flows into the first oil passage portion 111. Here, since the upper surface of the fifth bottom wall portion 115a in the fifth oil passage portion 115 is an inclined surface located on the lower side toward the front side, the oil O flowing into the fifth oil passage portion 115 is the first. 1 Easy to flow into the oil passage portion 111.

The oil O that has flowed from the fifth oil passage portion 115 into the first oil passage portion 111 flows to the left along the first oil passage portion 111. The oil O that has flowed into the first oil passage portion 111 is supplied to the coil ends 33a and 33b and the stator core 32 from above via the first oil supply port 117a.

Oil O flows into the sixth oil passage portion 116 from the rear oil passage portion 114k. The oil O that has flowed into the sixth oil passage portion 116 flows to the rear side along the sixth oil passage portion 116 and flows into the second oil passage portion 112. Here, since the upper surface of the sixth bottom wall portion 116a in the sixth oil passage portion 116 is an inclined surface located on the lower side toward the rear side, the oil O flowing into the sixth oil passage portion 116 is introduced. It is easy to flow to the second oil passage portion 112.

The oil O that has flowed from the sixth oil passage portion 116 into the second oil passage portion 112 flows to the left along the second oil passage portion 112. The oil O that has flowed into the second oil passage portion 112 is supplied to the coil ends 33a and 33b and the stator core 32 from above via the second oil supply port 117b.

According to the present embodiment, the third oil passage portion 113 has a fourth oil passage portion 114 located between the first oil passage portion 111 and the second oil passage portion 112 when viewed along the vertical direction. Therefore, by providing the oil supply port in the fourth oil passage portion 114, between the first oil passage portion 111 and the second oil passage portion 112 when viewed along the vertical direction via the fourth oil passage portion 114. Oil O can also be supplied from above to the portion of the stator 30 located at. Therefore, the cooling efficiency of the stator 30 can be further improved.

In the present embodiment, the fourth oil passage portion 114 has a third oil supply port 117c. Therefore, a part of the oil O flowing through the fourth oil passage portion 114 can be supplied to the coil ends 33a and 33b from above through the third oil supply port 117c. Further, in the present embodiment, the fourth oil passage portion 114 has the fourth oil supply port 117d. Therefore, a part of the oil O flowing into the fourth oil passage portion 114 can be supplied to the stator core 32 from the upper side through the fourth oil supply port 117d.

Further, according to the present embodiment, a partition wall portion 114i for partitioning the inside of the portion of the fourth oil passage portion 114 located on the right side of the left end portion to which the oil O is supplied is provided in the front-rear direction. Therefore, immediately after the oil O is supplied to the fourth oil passage portion 114, the flow of the oil O flows through the front side oil passage portion 114j toward the fifth oil passage portion 115 and the first oil passage portion 111. It can be branched into a flow through the rear oil passage 114k and toward the sixth oil passage 116 and the second oil passage 112. Therefore, the oil O supplied to the fourth oil passage portion 114 can be easily flowed to both the first oil passage portion 111 and the second oil passage portion 112, and the stator 30 can be more preferably cooled. Therefore, the cooling efficiency of the stator 30 can be further improved.

The present invention is not limited to the above-described embodiment, and other configurations may be adopted. The second reservoir does not have to be gutter-shaped as long as it can store oil and supply the oil to the stator from above. The second reservoir may be, for example, tubular. Oil may be supplied to the second reservoir from any portion. The shape of the second reservoir is not particularly limited as long as it has a first oil passage portion, a second oil passage portion, and a third oil passage portion.

The second reservoir may not have at least one of a second oil passage and a third oil passage. In this case, a plurality of first oil supply ports are provided in the first oil passage portion of the second reservoir along the direction in which the first oil passage portion extends, and the plurality of first oil supply ports are above the stator core. Supply oil from. According to this configuration, oil can be directly supplied to the stator core through the first oil supply port, and oil can be easily supplied to a wide range of the stator core by providing a plurality of first oil supply ports. Therefore, the stator can be suitably cooled. Therefore, the cooling efficiency of the stator can be improved.

The number of the first oil supply ports provided in the first oil passage portion is not limited, and may be only one. The first oil supply port is not particularly limited as long as oil can be supplied to the stator from above. The number of the second oil supply ports provided in the second oil passage portion is not limited, and may be only one. The second oil supply port is not particularly limited as long as oil can be supplied to the stator from above.

The third oil passage portion is not particularly limited as long as it connects the first oil passage portion and the second oil passage portion. For example, in the first embodiment, at least one of the third oil passage portions 13A and 13B may connect the axial central portion of the first oil passage portion 11 and the axial central portion of the second oil passage portion 12. .. Further, for example, in the second embodiment, the fourth oil passage portion 114 in the third oil passage portion 113 does not have to have the partition wall portion 114i. The third oil passage portion may not be provided with the third oil supply port and the fourth oil supply port. The fifth oil supply port may not be provided.

The applications of the drive device and the motor described above are not particularly limited. The motor does not have to be provided in the drive unit. The motor may be provided in equipment other than the vehicle. The configurations described herein can be combined as appropriate to the extent that they do not contradict each other.

1 ... Drive device, 2,102 ... Motor, 3 ... Transmission device, 10,110 ... Second reservoir (reservoir), 11,111 ... First oil passage, 12,112 ... Second oil passage, 13A, 13B, 113 ... 3rd oil passage, 17a, 117a ... 1st oil supply port, 17b, 17e, 117b ... 2nd oil supply port, 17c, 117c ... 3rd oil supply port, 17d ... 5th oil supply port, 20 ... rotor, 26, 27 ... bearing, 30 ... stator, 31 ... coil, 32 ... stator core, 33 ... coil assembly, 33a, 33b ... coil end, 81 ... motor housing, 81b ... protruding wall, 92c, 192c ... 3rd flow path (supply oil passage), 114 ... 4th oil passage, 114i ... partition wall, 115 ... 5th oil passage, 116 ... 6th oil passage, 117d ... 4th oil supply port, 213Ap ... 1st part, 213Aq ... 2nd part, 217c ... Circular supply port (3rd oil supply port), 217f, 217g ... Stretch supply port (3rd oil supply port), J1 ... Motor shaft, O ... Oil

Claims (15)

A rotor that rotates around a motor shaft that extends in the horizontal direction that is orthogonal to the vertical direction,
A stator facing the rotor in the radial direction through a gap,
A motor accommodating portion for accommodating the rotor and the stator inside and oil for accommodating the inside.
A reservoir located on the upper side of the stator in the vertical direction and storing the oil,
A supply oil passage for supplying the oil to the reservoir and
With
The stator is
With the stator core
A plurality of coils attached to the stator core along the circumferential direction,
Have,
The reservoir
The first oil passage extending in the axial direction and
A second oil passage portion extending in the axial direction and sandwiching the motor shaft with the first oil passage portion when viewed along the vertical direction,
A third oil passage portion connecting the first oil passage portion and the second oil passage portion,
Have,
The first oil passage portion has a first oil supply port for supplying the oil to the stator from the upper side in the vertical direction.
The second oil passage portion is a motor having a second oil supply port for supplying the oil to the stator from the upper side in the vertical direction. The motor according to claim 1, wherein the first oil supply port and the second oil supply port supply the oil to the stator core from above in the vertical direction. A plurality of the first oil supply ports are provided along the direction in which the first oil passage portion extends.
The motor according to claim 1 or 2, wherein a plurality of the second oil supply ports are provided along the direction in which the second oil passage portion extends. The stator has a coil assembly having the plurality of coils.
The coil assembly has a coil end that projects axially from the stator core.
The motor according to any one of claims 1 to 3, wherein the third oil passage portion has a third oil supply port for supplying the oil to the coil end from the upper side in the vertical direction. The motor according to claim 4, wherein a plurality of the third oil supply ports are provided along the direction in which the third oil passage portion extends. A protruding wall portion that protrudes downward in the vertical direction is provided on a portion of the inner surface of the motor accommodating portion that is located on the upper side in the vertical direction.
The protruding wall portion has a portion located on the upper side in the vertical direction of the third oil passage portion.
The third oil supply port includes an extension supply port extending along the direction in which the third oil passage portion extends.
The motor according to claim 4 or 5, wherein the extension supply port is located on the upstream side of the protruding wall portion in the oil flow direction in the third oil passage portion. The bottom wall of the third oil passage is
The first part and
A second portion connected to the downstream side of the first portion in the flow direction,
Have,
The second portion is curved along the outer peripheral surface of the coil end on the upper side in the vertical direction of the coil end.
The portion of the second portion connected to the first portion is located on the upper side in the vertical direction toward the downstream side in the flow direction.
The motor according to claim 6, wherein the extension supply port is provided so as to straddle the first portion and the second portion. The reservoir has a pair of the third oil passages that are arranged at axial intervals.
The third oil passage portion of one of the pair of third oil passage portions has an end portion on one side in the axial direction of the first oil passage portion and an end portion on one side in the axial direction of the second oil passage portion. Connect,
The other third oil passage portion of the pair of third oil passage portions includes an end portion of the first oil passage portion on the other side in the axial direction and an end portion of the second oil passage portion on the other side in the axial direction. The motor according to any one of claims 1 to 7, which is connected. The third oil passage portion is
A fourth oil passage portion that extends in the axial direction and is located between the first oil passage portion and the second oil passage portion when viewed along the vertical direction.
A fifth oil passage portion connecting an end portion on one side in the axial direction of the fourth oil passage portion and an end portion on one side in the axial direction of the first oil passage portion, and a fifth oil passage portion.
A sixth oil passage portion connecting the end portion on one side in the axial direction of the fourth oil passage portion and the end portion on one side in the axial direction of the second oil passage portion, and
Have,
The motor according to any one of claims 1 to 7, wherein the supply oil passage supplies the oil to the fourth oil passage portion. The motor according to claim 9, wherein the fourth oil passage portion has a fourth oil supply port for supplying the oil to the stator core from the upper side in the vertical direction. The supply oil passage supplies the oil to the other end of the fourth oil passage portion in the axial direction.
The fourth oil passage portion has a partition wall portion extending in the axial direction, and has a partition wall portion extending in the axial direction.
The partition wall portion is orthogonal to both the axial direction and the vertical direction inside the portion of the fourth oil passage portion located on one side in the axial direction from the end on the other side in the axial direction to which the oil is supplied. The motor according to claim 9 or 10, which partitions in the direction of Further provided with bearings that rotatably support the rotor
The motor according to any one of claims 1 to 11, wherein the reservoir has a fifth oil supply port located on the upper side in the vertical direction of the bearing. The motor according to any one of claims 1 to 12, wherein the reservoir has a gutter shape that opens upward in the vertical direction. A rotor that rotates around a motor shaft that extends in the horizontal direction that is orthogonal to the vertical direction,
A stator facing the rotor in the radial direction through a gap,
A motor accommodating portion for accommodating the rotor and the stator inside and oil for accommodating the inside.
A reservoir located on the upper side of the stator in the vertical direction and storing the oil,
A supply oil passage for supplying the oil to the reservoir and
With
The stator is
With the stator core
A plurality of coils attached to the stator core along the circumferential direction,
Have,
The reservoir has a first oil passage that extends in the axial direction.
The first oil passage portion has a first oil supply port for supplying the oil to the stator core from the upper side in the vertical direction.
A plurality of the first oil supply ports are provided along the direction in which the first oil passage portion extends. The motor according to any one of claims 1 to 14.
The transmission device connected to the motor and
A drive unit that is mounted on the vehicle.

Images