CN112564386B

CN112564386B - Driving device

Info

Publication number: CN112564386B
Application number: CN202011025916.4A
Authority: CN
Inventors: 中村圭吾; 高田响
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2019-09-25
Filing date: 2020-09-25
Publication date: 2024-06-04
Anticipated expiration: 2040-09-25
Also published as: JP7342568B2; JP2021052522A; CN112564386A

Abstract

The present invention provides a driving device, which comprises: a motor; and a housing that houses the motor therein. The housing has a wall portion provided with a refrigerant flow path through which a refrigerant flows. The refrigerant flow path has: a 1 st flow path portion; a branching portion connected to the 1 st flow path portion; and a 2 nd flow path portion and a 3 rd flow path portion branched from the branching portion and extending with respect to the 1 st flow path portion. The branch portion has an opening portion that opens to one side in the thickness direction of the wall portion. The opening is closed by a plug member.

Description

Driving device

Technical Field

The present invention relates to a driving device.

Background

Rotary electric machines having a plurality of flow paths through which a refrigerant passes are known. For example, patent document 1 describes a rotary electric machine as follows: cooling oil is supplied from a plurality of pipes to the stator core body to cool the stator.

Patent document 1: japanese patent application laid-open No. 2019-9967

In the rotating electrical machine described above, for example, it is conceivable to provide a plurality of flow paths by laying pipes or the like on the outside of the casing of the rotating electrical machine. Specifically, for example, in patent document 1, it is considered to provide a path for supplying cooling oil to a plurality of pipes by laying pipes or the like on the outside of a casing of a rotating electrical machine. However, in this case, there is a problem that the entire rotating electrical machine is easily enlarged.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a drive device having a motor and a structure capable of suppressing an increase in size.

The drive device according to one embodiment of the present invention includes: a motor; and a housing that houses the motor therein. The housing has a wall portion provided with a refrigerant flow path through which a refrigerant flows. The refrigerant flow path has: a 1 st flow path portion; a branching portion connected to the 1 st flow path portion; and a2 nd flow path portion and a 3 rd flow path portion branched from the branching portion and extending with respect to the 1 st flow path portion. The branch portion has an opening portion that opens to one side in the thickness direction of the wall portion. The opening is closed by a plug member.

According to one aspect of the present invention, the drive device having the motor can be prevented from being enlarged.

Drawings

Fig. 1 is a perspective view showing a driving device according to the present embodiment.

Fig. 2 is a schematic configuration diagram schematically showing the driving device of the present embodiment.

Fig. 3 is a perspective view showing the stator, the 1 st tube, and the 2 nd tube of the present embodiment.

Fig. 4 is a cross-sectional view showing a part of the driving device of the present embodiment, and is an IV-IV cross-sectional view of fig. 2.

Fig. 5 is a cross-sectional view showing a part of the driving device of the present embodiment, and is a V-V cross-sectional view of fig. 2.

Fig. 6 is a perspective view showing a part of the housing and the latch member of the present embodiment.

Fig. 7 is a cross-sectional view showing a part of the housing and the plug member of the present embodiment.

Fig. 8 is a perspective view showing a part of the case of the present embodiment, and is a view as seen in a direction in which the 2 nd branch flow path portion extends from the branch portion.

Fig. 9 is a perspective view showing the 1 st pipe of the present embodiment.

Description of the reference numerals

1: A driving device; 2: a motor; 3: a transfer device; 6: a housing; 11: a 1 st tube; 12: a 2 nd tube; 13: a 1 st oil supply port (refrigerant supply port); 14: a 2 nd oil supply port (refrigerant supply port); 15: a3 rd oil supply port (refrigerant supply port); 20: a rotor; 30: a stator; 55: an axle; 61: a motor housing (1 st housing); 62: a gear housing (2 nd housing); 63: a partition wall (wall portion); 63c: an internal thread portion; 64: a bolt member; 64b: a bolt head; 65: a sealing part; 94: a 4 th flow path (refrigerant flow path); 94a: an inflow channel section (1 st channel section); 94b: a branching portion; 94c: a 1 st branch flow path portion (a 2 nd flow path portion); 94f: a 2 nd branch flow path portion (3 rd flow path portion); 94g: an opening portion; j1: a motor axis; o: oil (refrigerant).

Detailed Description

In the following description, the vertical direction is defined based on the positional relationship of the case where the driving device 1 of the present embodiment shown in each figure is mounted on a vehicle on a horizontal road surface, and the description will be made. In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is the vertical direction. The +Z side is the upper side in the vertical direction, and the-Z side is the lower side in the vertical direction. In the following description, the upper side in the vertical direction will be simply referred to as "upper side", and the lower side in the vertical direction will be simply referred to as "lower side". The X-axis direction is a direction perpendicular to the Z-axis direction, and is a front-rear direction of a vehicle on which the drive device 1 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 perpendicular to both the X-axis direction and the Z-axis direction, and is a left-right direction of the vehicle, that is, a vehicle width direction. In the following embodiments, the +y side is the left side of the vehicle, and the-Y side is the right side of the vehicle. The front-rear direction and the left-right direction are horizontal directions perpendicular to the vertical direction. In the following embodiments, the left side corresponds to one axial side.

The positional relationship in the front-rear direction is not limited to the positional relationship in the following embodiment, 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 axis J1 appropriately shown in each figure extends in the Y-axis direction, i.e., the left-right direction of the vehicle. In the following description, unless otherwise specified, a direction parallel to the motor axis J1 is simply referred to as an "axial direction", a radial direction centered on the motor axis J1 is simply referred to as a "radial direction", and a circumferential direction centered on the motor axis J1, that is, a direction around the motor axis J1 is simply referred to as a "circumferential direction". In the present specification, "parallel direction" also includes a substantially parallel direction, and "perpendicular direction" also includes a substantially perpendicular direction.

The drive device 1 of the present embodiment shown in fig. 1 is mounted on a vehicle such as a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an Electric Vehicle (EV) using a motor as a power source, and is used as a power source for these vehicles. As shown in fig. 2, the driving device 1 includes a motor 2, a transmission device 3 including a reduction gear 4 and a differential device 5, a housing 6, an oil pump 96, a cooler 97, and a pipe 10. In the present embodiment, the drive device 1 does not include an inverter unit. In other words, the driving device 1 and the inverter unit are of a split structure.

The housing 6 houses the motor 2 and the transmission 3 therein. The housing 6 includes a motor housing portion 61, a gear housing portion 62, and a partition wall 63. The motor housing 61 is a portion that houses the rotor 20 and the stator 30, which will be described later, inside. The gear housing 62 is a portion that houses the transmission device 3 inside. The gear housing 62 is located on the left side of the motor housing 61. The bottom 61f of the motor housing 61 is located above the bottom 62c of the gear housing 62. The partition wall 63 axially divides the inside of the motor housing portion 61 and the inside of the gear housing portion 62. The partition wall 63 is provided with a partition wall opening 68. The partition wall opening 68 connects the inside of the motor housing portion 61 with the inside of the gear housing portion 62. The partition wall 63 is located at the left side of the stator 30.

The casing 6 accommodates oil O as a refrigerant therein. In the present embodiment, the oil O is stored in the motor storage 61 and the gear storage 62. An oil reservoir P for storing the oil O is provided in a lower region of the inside of the gear housing 62. The oil O in the oil reservoir P is transported into the motor housing 61 by an oil passage 90 described later. The oil O delivered to the inside of the motor housing 61 is stored in a lower region of the inside of the motor housing 61. At least a part of the oil O stored in the motor housing 61 moves toward the gear housing 62 through the partition wall opening 68, and returns to the oil reservoir P.

In the present specification, the term "oil is stored in a certain portion" means that at least a part of the oil is located in a certain portion during driving of the motor, and the oil may not be located in a certain portion when the motor is stopped. For example, in the present embodiment, the phrase "oil O is stored in the motor storage portion 61" means that at least a part of the oil O is located in the motor storage portion 61 during driving of the motor 2, and the oil O in the motor storage portion 61 may be moved to the gear storage portion 62 through the partition wall opening 68 when the motor 2 is stopped. A part of the oil O that is fed into the motor housing 61 through the oil passage 90 described later may remain in the motor housing 61 in a state where the motor 2 is stopped.

The oil O circulates in an oil passage 90 described later. The oil O is used for lubrication of the reduction gear unit 4 and the differential unit 5. In addition, the oil O is used for cooling the motor 2. As the oil O, it is preferable to use an oil equivalent to a lubricating oil (ATF: automatic Transmission Fluid) for an automatic transmission having a relatively low viscosity to realize the functions of lubricating oil and cooling oil.

As shown in fig. 1, in the present embodiment, the case 6 is configured by fixing three members, i.e., a case body 6a, a 1 st cover member 61b, and a2 nd cover member 62b, in the axial direction. The housing main body 6a has a 1 st portion 61a and a2 nd portion 62a connected to the left (+y side) end of the 1 st portion 61 a. The 1 st portion 61a has a cylindrical shape extending in the axial direction and opening to the right side (-Y side). The 1 st portion 61a accommodates the motor 2 therein. The 2 nd portion 62a extends in the front-rear direction, protruding to the rear side (-X side) than the 1 st portion 61 a. The 2 nd portion 62a is opened to the left.

The 1 st cover member 61b is fixed to the right side (-Y side) of the housing main body 6 a. The 1 st cover member 61b closes the opening on the right side of the 1 st portion 61 a. The 2 nd cover member 62b is fixed to the left side (+y side) of the housing main body 6 a. The 2 nd cover member 62b closes the opening on the left side of the 2 nd portion 62a. In the present embodiment, the motor housing portion 61 is constituted by the 1 st portion 61a and the 1 st cover member 61 b. In the present embodiment, the gear housing 62 is constituted by the 2 nd portion 62a and the 2 nd cover member 62 b. The inside of the 1 st portion 61a and the inside of the 2 nd portion 62a are divided by a partition wall 63. In the present embodiment, the motor housing 61 corresponds to the 1 st housing for housing the motor 2 therein. The gear housing 62 corresponds to the 2 nd housing for housing the transmission device 3 therein.

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

The shaft 21 extends in the axial direction about the motor axis J1. The shaft 21 rotates around the motor axis 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, connecting the hollow portion 22 with the outside of the shaft 21.

The shaft 21 extends across the motor housing 61 and the gear housing 62 of the housing 6. The left end of the shaft 21 protrudes into the gear housing 62. A1 st gear 41 of the transmission device 3, which will be described later, is fixed to the left end of the shaft 21. The shaft 21 is rotatably supported by bearings 26 and 27.

The stator 30 and the rotor 20 are opposed to each other with a gap therebetween in the radial direction. In more detail, the stator 30 is located radially outside the rotor 20. The stator 30 has a stator core 32 and a coil assembly 33. The stator core 32 is fixed to the inner peripheral surface of the motor housing 61. As shown in fig. 3 and 4, the stator core 32 has a stator core main body 32a and a fixing portion 32b. As shown in fig. 4, the stator core main body 32a has a cylindrical core back portion 32d extending in the axial direction and a plurality of teeth 32e extending radially inward from the core back portion 32 d. The plurality of teeth 32e are arranged at equal intervals over the entire circumference in the circumferential direction.

The fixing portion 32b protrudes radially outward from the outer peripheral surface of the stator core main body 32 a. The fixing portion 32b is a portion fixed to the housing 6. The fixing portions 32b are provided in plurality at intervals in the circumferential direction. The fixing portions 32b are provided with four, for example. The four fixing portions 32b are disposed at equal intervals over the entire circumferential direction.

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

In the following description, the fixing portion 32b protruding upward from the stator core main body 32a is simply referred to as "upper fixing portion 32b", and the fixing portion 32b protruding forward from the stator core main body 32a is simply referred to as "front fixing portion 32b".

As shown in fig. 3, the fixing portion 32b extends in the axial direction. The fixing portion 32b extends from, for example, an end portion on the left side (+y side) of the stator core main body 32a to an end portion on the right side (-Y side) of the stator core main body 32 a. The fixing portion 32b has a through hole 32c penetrating the fixing portion 32b in the axial direction. As shown in fig. 4, the bolt 34 extending in the axial direction passes through the through hole 32c. The bolt 34 passes through the through hole 32c from the right side (-Y side) and is screwed into the female screw hole 35 shown in fig. 5. The female screw hole 35 is provided in the partition wall 63. The fixing portion 32b is fixed to the partition wall 63 by screwing the bolt 34 into the female screw hole 35. Thus, the stator 30 is fixed to the housing 6 by the bolts 34.

As shown in fig. 2, the coil assembly 33 has a plurality of coils 31 mounted to the stator core 32 in the circumferential direction. The plurality of coils 31 are mounted on the respective teeth 32e of the stator core 32 via insulation members not shown. The plurality of coils 31 are arranged in the circumferential direction. More specifically, the plurality of coils 31 are arranged at equal intervals in the circumferential direction over the entire circumference. Although not shown, the coil assembly 33 may have a binding member or the like for binding the coils 31, or may have a bonding wire for connecting the coils 31 to each other.

The coil block 33 has coil ends 33a, 33b protruding in the axial direction from the stator core 32. The coil ends 33a are portions protruding rightward from the stator core 32. The coil end 33b is a portion protruding leftward from the stator core 32. The coil end 33a includes a portion of each coil 31 included in the coil assembly 33 protruding rightward from the stator core 32. The coil end 33b includes a portion of each coil 31 included in the coil assembly 33 protruding leftward from the stator core 32. As shown in fig. 3, in the present embodiment, the coil ends 33a and 33b have an annular shape centered on the motor axis J1. Although not shown, the coil ends 33a and 33b may include a binding member for binding the coils 31, or may include a bonding wire for connecting the coils 31 to each other.

As shown in fig. 2, bearings 26 and 27 rotatably support the rotor 20. The bearings 26, 27 are, for example, ball bearings. The bearing 26 is a bearing that rotatably supports a portion of the rotor 20 on the right side of the stator core 32. In the present embodiment, the bearing 26 supports a portion of the shaft 21 on the right side of the portion to which the rotor main body 24 is fixed. The bearing 26 is held by a1 st cover member 61b in the motor housing 61 that covers the rotor 20 and the stator 30 on the right side.

The bearing 27 is a bearing that rotatably supports a portion of the rotor 20 on the left side of the stator core 32. In the present embodiment, the bearing 27 supports a portion of the shaft 21 on the left side of the portion to which the rotor main body 24 is fixed. The bearing 27 is held by the partition wall 63.

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

The reduction gear 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 reduction gear 4 transmits the torque output from the motor 2 to the differential gear 5. The reduction gear 4 has a1 st gear 41, a2 nd gear 42, a3 rd gear 43, and an intermediate shaft 45.

The 1 st gear 41 is fixed to the outer peripheral surface of the left end portion of the shaft 21. The 1 st gear 41 rotates together with the shaft 21 about the motor axis J1. The intermediate shaft 45 extends along an intermediate axis J2 parallel to the motor axis J1. The intermediate shaft 45 rotates about the intermediate axis J2. The 2 nd gear 42 and the 3 rd gear 43 are fixed to the outer peripheral surface of the intermediate shaft 45. The 2 nd gear 42 and the 3 rd gear 43 are connected via an intermediate shaft 45. The 2 nd gear 42 and the 3 rd gear 43 rotate about the intermediate axis J2. The 2 nd gear 42 is meshed with the 1 st gear 41. The 3 rd gear 43 meshes with a ring gear 51 of the differential device 5, which will be described later.

The torque output from the motor 2 is transmitted to the ring gear 51 of the differential device 5 via the shaft 21, the 1 st gear 41, the 2 nd gear 42, the intermediate shaft 45, and the 3 rd 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 reduction ratio required. In the present embodiment, the reduction gear 4 is a parallel axis gear type reduction gear in which the axes of the gears are arranged in parallel.

The differential device 5 is connected to the motor 2 via the reduction device 4. The differential device 5 is a device for transmitting torque output from the motor 2 to wheels of the vehicle. The differential device 5 transmits the same torque to the left and right axles 55 while absorbing the speed difference between the left and right wheels when the vehicle turns. As described above, in the present embodiment, the transmission device 3 transmits the torque of the motor 2 to the axle 55 of the vehicle via the reduction device 4 and the differential device 5. Thereby, the drive device 1 rotates the axle 55 of the vehicle.

The differential device 5 has a ring gear 51, a gear box not shown, a pair of pinion gears not shown, a pinion shaft not shown, and a pair of side gears not shown. The ring gear 51 rotates about a differential axis J3 parallel to the motor axis J1. The torque output from the motor 2 is transmitted to the ring gear 51 via the reduction gear 4.

The motor 2 is provided with an oil passage 90 through which the oil supply O circulates inside the housing 6. The oil passage 90 is a path for supplying the oil O from the oil reservoir P to the motor 2 and guiding the oil O to the oil reservoir P again. The oil passage 90 is provided across the inside of the motor housing 61 and the inside of the gear housing 62.

In the present specification, the "oil passage" refers to a path of oil. Therefore, the "oil passage" is a concept as follows: the "flow path" that generates a flow of oil stably directed in one direction is included, as well as a path where the oil supply temporarily stays and a path where the oil supply drops. The path in which the oil supply temporarily stays includes, for example, a reservoir for storing the oil.

The oil passage 90 has a1 st oil passage 91 and a2 nd oil passage 92. The 1 st oil passage 91 and the 2 nd oil passage 92 supply oil O respectively to circulate inside the casing 6. The 1 st oil passage 91 includes a lift path 91a, a shaft supply path 91b, an in-shaft path 91c, and an in-rotor path 91d. Further, a1 st reservoir 93 is provided in the path of the 1 st oil passage 91. The 1 st reservoir 93 is provided in the gear housing 62.

The lifting path 91a lifts the oil O from the oil reservoir P by the rotation of the ring gear 51 of the differential device 5, and receives the oil O by the 1 st reservoir 93. The 1 st reservoir 93 is open at the upper side. The 1 st reservoir 93 receives the oil O lifted by the ring gear 51. In addition, in a case where the liquid surface S of the oil reservoir P is high immediately after the motor 2 is driven, the 1 st reservoir 93 receives not only the oil O lifted by the ring gear 51 but also the oil O lifted by the 2 nd gear 42 and the 3 rd gear 43.

The shaft supply path 91b guides the oil O from the 1 st reservoir 93 to the hollow portion 22 of the shaft 21. The in-shaft path 91c is a path through which the oil supply O passes in the hollow portion 22 of the shaft 21. The rotor internal path 91d is a path through which the oil supply O passes from the communication hole 23 of the shaft 21 through the inside of the rotor body 24 and is scattered toward the stator 30.

In the in-shaft path 91c, centrifugal force is applied to the oil O in the rotor 20, which accompanies the rotation of the rotor 20. Thereby, the oil O continuously flies from the rotor 20 to the radial outside. In addition, as the oil O is scattered, the path inside the rotor 20 becomes negative pressure, and the oil O stored in the 1 st reservoir 93 is sucked into the rotor 20, so that the path inside the rotor 20 is filled with the oil O.

The oil O reaching the stator 30 takes heat from the stator 30. The oil O that cools the stator 30 drops downward and is accumulated in a lower region in the motor housing 61. The oil O accumulated in the lower region of the motor housing 61 moves toward the gear housing 62 through the partition wall opening 68 provided in the partition wall 63. As described above, the 1 st oil passage 91 supplies the oil O to the rotor 20 and the stator 30.

In the 2 nd oil passage 92, the oil O is lifted from the oil reservoir P and supplied to the stator 30. The 2 nd oil passage 92 is provided with an oil pump 96, a cooler 97, and the pipe 10. The 2 nd oil passage 92 has a1 st flow passage 92a, a2 nd flow passage 92b, a 3 rd flow passage 92c, and a4 th flow passage 94. In the present embodiment, the 4 th flow path 94 corresponds to a refrigerant flow path through which the oil O as the refrigerant flows. That is, the driving device 1 of the present embodiment has the 4 th flow path 94 as a refrigerant flow path.

The 1 st flow path 92a, the 2 nd flow path 92b, and the 3 rd flow path 92c are provided in the wall portion of the housing 6. The 1 st flow path 92a connects the oil reservoir P to the oil pump 96. The 2 nd flow path 92b connects the oil pump 96 to the cooler 97. The 3 rd flow path 92c connects the cooler 97 with the 4 th flow path 94. As shown in fig. 1, the 3 rd flow path 92c is provided, for example, in a wall portion on the front side (+x side) of the wall portion of the motor housing portion 61. More specifically, the 3 rd flow path 92c is provided in the wall portion on the front side of the 1 st portion 61 a. A part of the portion of the front wall portion of the 1 st portion 61a where the 3 rd flow path 92c is provided protrudes toward the front side, and extends obliquely with respect to the axial direction. A part of the portion of the front wall of the 1 st portion 61a where the 3 rd flow path 92c is provided is located on the upper side from the right side (-Y side) toward the left side (+y side), for example.

As shown in fig. 2, the 4 th flow path 94 is provided in the partition wall 63. That is, in the present embodiment, the partition wall 63 corresponds to a wall portion provided with the refrigerant flow path. The 4 th flow path 94 connects the 1 st pipe 11 and the 2 nd pipe 12, which will be described later, of the pipes 10. As shown in fig. 5, the 4 th flow path 94 has an inflow flow path portion 94a, a branching portion 94b, a 1 st branching flow path portion 94c, and a 2 nd branching flow path portion 94f. In the present embodiment, the inflow channel portion 94a is a refrigerant introduction portion that causes the oil O as the refrigerant to flow into the branch portion 94 b. The 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94f are refrigerant discharge portions that allow the oil O as the refrigerant to flow out from the branch portion 94 b. Therefore, by flowing the oil O into the inflow channel portion 94a, the oil O can be conveyed to both branch channel portions via the branch portion 94 b. In the present embodiment, the inflow channel portion 94a corresponds to the 1 st channel portion. The 1 st branch flow path portion 94c corresponds to the 2 nd flow path portion. The 2 nd branch flow path portion 94f corresponds to the 3 rd flow path portion.

The inflow channel portion 94a is a portion of the 4 th channel 94 into which the oil supply O flows from the 3 rd channel 92 c. The inflow channel portion 94a extends from the 3 rd channel 92c to the rear side (-X side). The inflow channel portion 94a is located on the front side (+x side) of the shaft 21, and extends linearly in the front-rear direction in the radial direction. The inner diameter of the inflow channel portion 94a becomes larger at the front end. In the present embodiment, the front end of the inflow channel section 94a is the radially outer end of the inflow channel section 94 a.

The front end (+x side) of the inflow channel portion 94a is located radially outward of the fixed portion 32 b. The rear (-X side) end of the inflow channel portion 94a is located radially inward of the fixed portion 32 b. That is, in the present embodiment, the inflow channel portion 94a extends from a position radially outward of the fixed portion 32b to a position radially inward of the fixed portion 32b in the front-rear direction. The inflow channel portion 94a is located above the front side (+x side) fixing portion 32 b. The inflow channel portion 94a is formed by drilling a hole from the front side (+x side) of the housing 6 by a drill, for example. The front end of the inflow channel portion 94a is screwed into the hole by a bolt 95 a. The bolt 95a is, for example, the same bolt as the bolt member 64 described later.

The branch portion 94b is connected to the inflow channel portion 94 a. In the present embodiment, the branch portion 94b is connected to the rear (-X side) end of the inflow channel portion 94 a. The flow path diameter of the branch portion 94b is larger than the flow path diameter of the inflow flow path portion 94a, the flow path diameter of the 1 st branch flow path portion 94c, and the flow path diameter of the 2 nd branch flow path portion 94 f. The branch portion 94b is located radially inward of the fixed portion 32 b. As shown in fig. 6 to 8, the branch portion 94b is constituted by a hole portion 63b provided in the partition wall 63. In the present embodiment, the hole 63b is provided in a protruding portion 63a protruding leftward (+y side) in the partition wall 63. The protruding portion 63a is connected to the inner peripheral surface of the 2 nd portion 62 a.

The hole 63b is recessed from the left side (+y side) to the right side (-Y side) in the axial direction. More specifically, the hole 63b is recessed rightward from the left end surface of the protruding portion 63 a. Here, in the present embodiment, the axial direction corresponds to the thickness direction of the partition wall 63, the left side corresponds to one side in the thickness direction, and the right side corresponds to the other side in the thickness direction. That is, the partition wall 63 has a hole portion 63b recessed from one side to the other side in the thickness direction of the partition wall 63. In the present embodiment, the hole 63b is recessed from the side of the gear housing 62 toward the side of the motor housing 61. The hole 63b is a hole having a bottom on the right side. The hole 63b is, for example, a circular hole when viewed in the axial direction.

The branch portion 94b is formed by such a hole 63b, and therefore the branch portion 94b has an opening 94g that opens to the left. The opening 94g is the left end of the hole 63 b. The opening 94g opens toward the gear housing 62. The opening diameter of the opening 94g is larger than the inner diameter of the inflow channel portion 94a, the inner diameter of the 1 st branch channel portion 94c, and the inner diameter of the 2 nd branch channel portion 94 f.

As shown in fig. 7, a female screw portion 63c is provided on the inner peripheral surface of the hole portion 63 b. That is, the female screw 63c is provided on the inner peripheral surface of the branch portion 94 b. More specifically, the female screw portion 63c is provided on the inner peripheral surface of the left side portion of the hole portion 63 b. The hole 63b is formed by drilling a hole from the left side (+y side) of the partition wall 63 with a drill, for example.

The left end of the hole 63b, that is, the opening 94g is closed by the plug member 64. This can suppress leakage of the oil O flowing into the branch portion 94b to the outside of the partition wall 63. In the present embodiment, the bolt member 64 is a bolt screwed into the female screw portion 63 c. Therefore, by screwing the plug member 64, the opening 94g, which is the left end of the hole 63b, can be easily closed.

The bolt member 64 has a bolt body portion 64a and a bolt head portion 64b. The outer peripheral surface of the bolt body 64a is provided with a male screw portion 64c that engages with the female screw portion 63 c. The bolt head 64b protrudes radially outward of the bolt member 64 from the left end of the bolt body 64 a. The right surface of the bolt head 64b contacts the peripheral edge portion of the hole 63b in the left surface of the partition wall 63. In the present embodiment, the peripheral edge portion of the hole 63b in the left surface of the partition wall 63 is a part of the left surface of the protruding portion 63 a.

A seal portion 65 is provided on the right side surface of the bolt head portion 64 b. The seal portion 65 is fitted into a groove portion 64d provided on the right side surface of the bolt head portion 64b, for example. The seal portion 65 is annular and surrounds the bolt body portion 64 a. The sealing portion 65 is made of rubber, for example. The seal portion 65 is in contact with the peripheral edge portion of the hole portion 63b in the left side surface of the partition wall 63. Thereby, the sealing portion 65 seals between the peripheral edge portion of the hole 63b in the partition wall 63 and the bolt head portion 64 b. That is, the seal portion 65 seals between the opening peripheral edge of the branch portion 94b and the bolt head portion 64 b. Therefore, the oil O flowing into the branch portion 94b can be further suppressed from leaking to the outside of the partition wall 63.

As shown in fig. 5, the 1 st branch flow path portion 94c is a portion that branches from the branch portion 94b with respect to the inflow flow path portion 94a and extends. In the present embodiment, the 1 st branch flow path portion 94c extends from the branch portion 94b to the 1 st pipe 11 described later. The 1 st branch flow path portion 94c extends obliquely upward and rearward from the branch portion 94 b. The 1 st branch flow path portion 94c extends to an upper end portion of the partition wall 63 through a portion of the partition wall 63 located below the upper fixing portion 32b and above the shaft 21. The radial position of the upper end of the 1 st branch flow path portion 94c is substantially the same as the radial position of the fixed portion 32 b. The upper end of the 1 st branch flow path portion 94c is located at a position on the rear side (-X side) of the upper fixed portion 32 b. The upper end of the 1 st branch flow path portion 94c is located above the upper ends of the branch portions 94b and 2 nd branch flow path portion 94 f.

The 1 st branch flow path portion 94c has an extension portion 94d extending straight obliquely upward and rearward from the branch portion 94b, and a connection portion 94e connected to an upper end portion of the extension portion 94 d. The connection portion 94e is an upper end portion of the 1 st branch flow path portion 94c, and is a portion connected to the 1 st pipe 11 described later. The inner diameter of the connecting portion 94e is larger than the inner diameter of the extending portion 94 d. The connection portion 94e is produced by, for example, drilling a hole from the upper side of the case 6 with a drill. The upper end of the connecting portion 94e is closed by screwing a bolt 95 b. The bolt 95b is, for example, the same bolt as the bolt member 64 described above. The extension 94d is produced by, for example, boring a hole obliquely forward from the upper side of the case 6 via the inside of the connection portion 94e with a drill.

The 2 nd branch flow path portion 94f is a portion that branches from the branch portion 94b with respect to the inflow flow path portion 94a and extends. In the present embodiment, the 2 nd branch flow path portion 94f extends from the branch portion 94b to the 2 nd pipe 12 described later. In the present embodiment, the 2 nd branch flow path portion 94f extends obliquely upward from the branch portion 94b toward the front side. That is, the 1st branch flow path portion 94c and the 2 nd branch flow path portion 94f extend in opposite directions to each other in the direction in which the inflow flow path portion 94a extends, as viewed in the thickness direction of the partition wall 63.

More specifically, the 1 st branch flow path portion 94c is located in a region on the opposite side (-X side) from the side on which the inflow flow path portion 94a is located, based on the virtual line IL shown in fig. 5, when viewed in the thickness direction of the partition wall 63. The 2 nd branch flow path portion 94f is located in a region on the side (+x side) where the inflow flow path portion 94a is located, based on the virtual line IL, when viewed in the thickness direction of the partition wall 63. The virtual line IL extends in the vertical direction perpendicular to the front-rear direction in which the inflow channel portion 94a extends, and passes through the center of the branch portion 94b in the front-rear direction, as viewed in the thickness direction of the partition wall 63. In the present embodiment, the front-rear direction corresponds to the extending direction in which the 1 st flow path portion extends.

The 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94f extend obliquely in a direction away from each other in the front-rear direction as going upward from the branch portion 94 b. The 2 nd branch flow path portion 94f extends linearly obliquely to the right side (-Y side) with respect to the front-rear direction. Thus, the 2 nd branch flow path portion 94f is located on the right side as it is away from the branch portion 94 b.

The radial position of the end portion of the 2 nd branch flow path portion 94f on the front side (+x side) is substantially the same as the radial position of the fixed portion 32 b. The front end (+x side) of the 2 nd branch flow path portion 94f is located above the front fixed portion 32 b. The front end of the 2 nd branch flow path portion 94f and the front fixing portion 32b are disposed at substantially the same position in the front-rear direction. The 2 nd branch flow path portion 94f is produced by, for example, boring a hole from the left side (+y side) of the partition wall 63 through the inside of the branch portion 94b, that is, the inside of the hole portion 63b by a drill.

As shown in fig. 8, the 2 nd branch flow path portion 94f overlaps with the opening 94g, which is the end portion on the left side (+y side) of the hole 63b, when viewed in the direction in which the 2 nd branch flow path portion 94f extends from the branch portion 94 b. Specifically, the entire 2 nd branch flow path portion 94f overlaps with a part of the opening 94g when viewed in a direction in which the 2 nd branch flow path portion 94f extends from the branch portion 94 b. That is, the direction in which the 2 nd branch flow path portion 94f extends from the branch portion 94b is a direction in which a drill can be inserted from the opening portion 94g to perform machining. Specifically, before the attachment of the plug member 64, a drill may be inserted straight into the hole 63b from the opening of the hole 63b, and the partition wall 63 may be subjected to hole processing, thereby producing the 2 nd branch flow path portion 94f. Therefore, the 2 nd branch flow path portion 94f can be easily manufactured. In the present embodiment, since the inner diameter of the opening 94g is larger than the inner diameters of the 1 st and 2 nd branch flow path portions 94c and 94f, a drill is easily inserted from the opening 94g into the hole 63b, and the 2 nd branch flow path portion 94f can be more easily manufactured.

As shown in fig. 5, the angle θ1 between the direction in which the 1 st branch flow path portion 94c extends from the branch portion 94b and the direction in which the inflow flow path portion 94a extends toward the branch portion 94b is smaller than the angle θ2 between the direction in which the 2 nd branch flow path portion 94f extends from the branch portion 94b and the direction in which the inflow flow path portion 94a extends toward the branch portion 94b, as viewed in the thickness direction of the partition wall 63, i.e., in the axial direction. In the present embodiment, the direction in which the inflow channel portion 94a extends toward the branch portion 94b is the rear side direction (-X direction) when viewed in the axial direction. In the present embodiment, the direction in which the 1 st branch flow path portion 94c extends from the branch portion 94b is the upward-obliquely rearward direction as viewed in the axial direction. In the present embodiment, the direction in which the 2 nd branch flow path portion 94f extends from the branch portion 94b is the upward-oblique forward direction as viewed in the axial direction.

The angle θ1 is the smaller angle of the imaginary line Li passing through the central axis of the inflow channel portion 94a and the imaginary line Lb1 passing through the central axis of the 1 st branch channel portion 94c when viewed in the axial direction. The angle θ2 is the larger angle of the virtual line Li passing through the central axis of the inflow channel portion 94a and the virtual line Lb2 passing through the central axis of the 2 nd branch channel portion 94f when viewed in the axial direction. In the present embodiment, the virtual line Li passes through the motor axis J1 when viewed in the axial direction. In the present embodiment, the angle θ1 is an acute angle. The angle θ2 is an obtuse angle. The angle θ1 is, for example, about 45 ° or more and 80 ° or less. The angle θ2 is, for example, about 100 ° or more and 170 ° or less.

In the present embodiment, the angle θ3 is larger than the angle θ4 when viewed in the thickness direction of the partition wall 63, the angle θ3 being an angle between the direction in which the inflow channel portion 94a extends from the branch portion 94b (+x direction) and the direction in which the 1 st branch channel portion 94c extends from the branch portion 94b, and the angle θ4 being an angle between the direction in which the inflow channel portion 94a extends from the branch portion 94b and the direction in which the 2 nd branch channel portion 94f extends from the branch portion 94 b. The angle θ3 is the larger one of the angles formed by the inflow channel portion 94a and the 1 st branch channel portion 94c when viewed in the axial direction. The angle θ4 is the smaller one of the angles formed by the inflow channel portion 94a and the 2 nd branch channel portion 94f when viewed in the axial direction. In the present embodiment, the angle θ3 is an obtuse angle. In the present embodiment, the angle θ4 is an acute angle. The angle θ3 is, for example, about 90 ° or more and 150 ° or less. The angle θ4 is, for example, about 10 ° or more and 30 ° or less.

In the 4 th flow path 94, a rear portion of the inflow path portion 94a, a portion other than an upper end portion of the branch portion 94b, the extension portion 94d, and a rear portion of the 2 nd branch flow path portion 94f are provided at a portion of the partition wall 63 radially inward of the fixed portion 32 b. That is, in the present embodiment, the 4 th flow path 94 has a portion passing through a position radially inward of the fixed portion 32 b.

As shown in fig. 2, the tube 10 extends in the axial direction. The left end of the tube 10 is fixed to the partition wall 63. As shown in fig. 3, the tube 10 includes a1 st tube 11 and a2 nd tube 12. That is, the driving device 1 has the 1 st tube 11 and the 2 nd tube 12. In the present embodiment, the 1 st pipe 11 and the 2 nd pipe 12 have a cylindrical shape extending linearly in the axial direction. The 1 st pipe 11 and the 2 nd pipe 12 are parallel to each other. As shown in fig. 4, the 1 st pipe 11 and the 2 nd pipe 12 are housed inside the case 6. The 1 st pipe 11 and the 2 nd pipe 12 are located radially outside the stator 30. The 1 st pipe 11 and the 2 nd pipe 12 are arranged at intervals in the circumferential direction. The radial position of the 1 st pipe 11 is, for example, the same as the radial position of the 2 nd pipe 12.

In the present specification, "the 1 st pipe and the 2 nd pipe extend linearly in the axial direction of the motor axis" includes the case where the 1 st pipe and the 2 nd pipe extend linearly in the substantially axial direction in addition to the case where the 1 st pipe and the 2 nd pipe extend strictly linearly in the axial direction. That is, in the present embodiment, the "1 st pipe 11 and the 2 nd pipe 12 extend linearly in the axial direction" may be, for example, the 1 st pipe 11 and the 2 nd pipe 12 extend slightly inclined with respect to the axial direction. In this case, the direction in which the 1 st pipe 11 is inclined with respect to the axial direction may be the same as or different from the direction in which the 2 nd pipe 12 is inclined with respect to the axial direction.

In the present embodiment, the 1 st pipe 11 is located on the upper side of the stator 30. In the present embodiment, the radial position of the 1 st pipe 11 is the same as the radial position of the fixing portion 32 b. The 1 st tube 11 is located at the rear side (-X side) of the upper fixing portion 32 b. As shown in fig. 9, the 1 st pipe 11 has: a1 st pipe body 11a; a small diameter portion 11b provided at the left (+y side) end of the 1 st pipe body portion 11a; and a small diameter portion 11c provided at the right (-Y side) end of the 1 st pipe body portion 11 a.

The small diameter portion 11b is the left side (+y side) end of the 1st pipe 11. The small diameter portion 11c is the right (-Y side) end of the 1st pipe 11. The outer diameters of the small diameter portions 11b, 11c are smaller than the outer diameter of the 1st pipe main body portion 11 a. The 1st pipe 11 is fixed to the partition wall 63 so that the small diameter portion 11b is inserted into the partition wall 63 from the right side. The small diameter portion 11b opens to the left. As shown in fig. 5, the small-diameter portion 11b opens into the connection portion 94e of the 1st branch flow path portion 94 c. Thus, the 1st pipe 11 is connected to the 4 th flow path 94.

As shown in fig. 9, a mounting member 16 is provided at the right (-Y side) end of the 1 st pipe 11. The mounting member 16 has a rectangular plate shape with a plate surface facing in the axial direction. The mounting member 16 has a recess 16a recessed from the left side (+y side) toward the right side. The small diameter portion 11c, which is the right end of the 1 st pipe 11, is fitted and fixed to the recess 16a. The right end of the 1 st pipe 11 is closed by a mounting member 16.

The mounting member 16 has a hole portion 16b penetrating the mounting member 16 in the axial direction. As shown in fig. 3, the bolt 18 passes through the hole portion 16b from the right side (-Y side). The bolt 18 is inserted through the hole 16b and screwed into the protruding portion 61d shown in fig. 4 from the right side. The protruding portion 61d protrudes radially inward on the inner peripheral surface of the motor housing portion 61. The mounting member 16 is fixed to the protruding portion 61d by screwing the bolt 18 into the protruding portion 61d. Thus, the right end of the 1 st pipe 11 is fixed to the motor housing 61 via the mounting member 16.

As shown in fig. 9, the 1 st pipe 11 has a plurality of 1 st oil supply ports 13 and a plurality of 2 nd oil supply ports 14. In the present embodiment, the 1 st oil supply port 13 and the 2 nd oil supply port 14 correspond to refrigerant supply ports for supplying refrigerant to the stator 30. The oil O flowing into the 1 st pipe 11 is discharged from the 1 st oil supply port 13 and the 2 nd oil supply port 14. The 1 st oil supply port 13 and the 2 nd oil supply port 14 are provided on the outer peripheral surface of the 1 st pipe 11. The 1 st oil supply port 13 and the 2 nd oil supply port 14 are holes penetrating the 1 st pipe 11 from the inner peripheral surface to the outer peripheral surface. The 1 st oil supply port 13 and the 2 nd oil supply port 14 are, for example, circular. As shown in fig. 3 and 9, the 1 st oil supply port 13 and the 2 nd oil supply port 14 are directed downward.

In the present embodiment, a plurality of 1 st oil supply ports 13 are provided at each of the axial end portions of the 1 st pipe body portion 11 a. For example, four 1 st oil supply ports 13 are provided at each of the axial end portions of the 1 st pipe body portion 11 a. The four 1 st oil supply ports 13 provided at the right (-Y side) end of the 1 st pipe body 11a are arranged in a zigzag manner in the circumferential direction. The four 1 st oil supply ports 13 provided at the right end of the 1 st pipe body 11a include one 1 st oil supply port 13 opening directly downward, two 1 st oil supply ports 13 opening obliquely downward and forward, and one 1 st oil supply port 13 opening obliquely downward and rearward. The four 1 st oil supply ports 13 provided at the left side (+y side) end portion of the 1 st pipe body portion 11a are arranged in the same manner as the four 1 st oil supply ports 13 provided at the right side portion of the 1 st pipe body portion 11a except for the axial position.

As shown in fig. 3, four 1 st oil supply ports 13 provided on the right side (-Y side) among the plurality of 1 st oil supply ports 13 are located on the upper side of the coil end 33 a. Four 1 st oil supply ports 13 provided on the left side (+y side) among the plurality of 1 st oil supply ports 13 are located on the upper side of the coil end 33b. Therefore, the oil O discharged from the 1 st oil supply port 13 is supplied to the coil ends 33a, 33b from the upper side. That is, in the present embodiment, the 1 st oil supply port 13 is a supply port for supplying the oil O to the coil ends 33a, 33b.

The 2 nd oil supply port 14 is provided in the axial center portion of the 1 st pipe 11. In the present embodiment, two 2 nd oil supply ports 14 are provided at an axially-spaced interval in the central portion of the 1 st pipe body portion 11a in the axial direction. As shown in fig. 4, in the present embodiment, the 2 nd oil supply port 14 opens obliquely downward and forward. As shown in fig. 3 and 4, the 2 nd oil supply port 14 is located on the upper side of the stator core 32. Therefore, the oil O discharged from the 2 nd oil supply port 14 is supplied to the stator core 32 from the upper side. That is, in the present embodiment, the 2 nd oil supply port 14 is a supply port for supplying the oil O to the stator core 32.

In the present specification, the term "the refrigerant supply port is directed downward in the vertical direction" means that the refrigerant supply port may be directed directly downward or may be directed obliquely to the directly downward as long as the direction of the refrigerant supply port includes a downward component. As described above, in the present embodiment, the 1 st oil supply port 13 as the refrigerant supply port includes the 1 st oil supply port 13 directed directly downward, the 1 st oil supply port 13 directed in a direction inclined forward with respect to the directly downward direction, and the 1 st oil supply port 13 directed in a direction inclined rearward with respect to the directly downward direction. In the present embodiment, the 2 nd oil supply port 14 as the refrigerant supply port is inclined obliquely forward with respect to the immediately lower direction. In the present embodiment, the "2 nd oil supply port 14 is directed downward" may be directed, for example, directly downward or directed obliquely rearward with respect to the directly downward direction with respect to the 2 nd oil supply port 14.

The 2 nd tube 12 is located at the front side (+x side) of the stator 30. In the present embodiment, the radial position of the 2 nd pipe 12 is the same as the radial position of the fixing portion 32 b. The 2 nd pipe 12 is located on the upper side of the front-side fixing portion 32 b. The fixing portion 32b located on the upper side is located between the 1 st pipe 11 and the 2 nd pipe 12 in the circumferential direction. That is, the 1 st pipe 11 and the 2 nd pipe 12 are arranged with the fixing portion 32b interposed therebetween in the circumferential direction.

As shown in fig. 3, the 2 nd pipe 12 includes a2 nd pipe main body portion 12a and a small diameter portion 12b provided at an end portion of the left side (+y side) of the 2 nd pipe main body portion 12 a. Although not shown, the 2 nd pipe 12 has a small diameter portion provided at the right (-Y side) end of the 2 nd pipe body 12a, similarly to the 1 st pipe 11.

The small diameter portion 12b is the left side (+y side) end of the 2 nd pipe 12. The small diameter portion 12b has an outer diameter smaller than that of the pipe main body portion 12a 2. The 2 nd pipe 12 is fixed to the partition wall 63 so that the small diameter portion 12b is inserted into the partition wall 63 from the right side (-Y side). The small diameter portion 12b opens to the left. As shown in fig. 5, the small-diameter portion 12b opens to the front side (+x side) end of the 2 nd branch flow path portion 94 f. Thus, the 2 nd pipe 12 is connected to the 4 th flow path 94. Thus, the 1 st pipe 11 and the 2 nd pipe 12 are connected to each other via the 4 th flow path 94. More specifically, the 1 st pipe 11 and the 2 nd pipe 12 are connected to each other via the 1 st branch flow path portion 94c, the branch portion 94b, and the 2 nd branch flow path portion 94 f.

As shown in fig. 3, a mounting member 17 is provided at the right (-Y side) end of the 2 nd pipe 12. The mounting member 17 has a rectangular plate shape with a plate surface facing in the axial direction. The right end of the 2 nd pipe 12 is fixed to the mounting member 17 in the same manner as the 1 st pipe 11. The right end of the 2 nd pipe 12 is closed by a mounting member 17. Although not shown, the mounting member 17 is bolted to the protruding portion 61e shown in fig. 4, similarly to the mounting member 16. Thus, the right end of the 2 nd pipe 12 is fixed to the motor housing 61 via the mounting member 17. The protruding portion 61e protrudes radially inward on the inner peripheral surface of the motor housing portion 61.

As shown in fig. 3, the 2 nd pipe 12 has a plurality of 3 rd oil supply ports 15. In the present embodiment, the 3 rd oil supply port 15 corresponds to a refrigerant supply port for supplying the refrigerant to the stator 30. The oil O flowing into the 2 nd pipe 12 is discharged from the 3 rd oil supply port 15. The 3 rd oil supply port 15 is provided on the outer peripheral surface of the 2 nd pipe 12. More specifically, the 3 rd oil supply port 15 is provided on the outer peripheral surface of the 2 nd pipe body 12 a. The 3 rd oil supply ports 15 are arranged at intervals in the axial direction. For example, six 3 rd oil supply ports 15 are provided. The 3 rd oil supply port 15 is a hole penetrating the 2 nd pipe 12 from the inner peripheral surface to the outer peripheral surface. The 3 rd oil supply port 15 is, for example, circular.

As shown in fig. 4, the 3 rd oil supply port 15 is directed upward. In the present embodiment, the 3 rd oil supply port 15 is inclined rearward upward. The 3 rd oil supply port 15 is located on the front side (+x side) of the stator core 32. The oil O discharged from the 3 rd oil supply port 15 is sprayed obliquely upward and backward, and is supplied to the outer peripheral surface of the stator core main body 32 a. That is, in the present embodiment, the 3 rd oil supply port 15 is a supply port for supplying the oil O to the stator core 32.

In the present specification, the term "the refrigerant supply port is directed upward" means that the direction of the refrigerant supply port may include an upward component, and the refrigerant supply port may be directed directly upward or may be directed obliquely to the directly upward direction. As described above, the 3 rd oil supply port 15 of the present embodiment is inclined obliquely rearward with respect to the right upper direction. In the present embodiment, the "3 rd oil supply port 15 is directed upward" may be the 3 rd oil supply port 15 directed, for example, directly upward or directed obliquely forward with respect to the directly upward direction.

The oil pump 96 shown in fig. 2 is a pump that delivers oil O as a refrigerant. In the present embodiment, the oil pump 96 is an electric pump driven by electricity. The oil pump 96 sucks up the oil O from the oil reservoir P via the 1 st flow path 92a, and supplies the oil O to the motor 2 via the 2 nd flow path 92b, the cooler 97, the 3 rd flow path 92c, the 4 th flow path 94, and the pipe 10. That is, the oil pump 96 feeds the oil O stored in the casing 6 to the 4 th flow path 94, the 1 st pipe 11, and the 2 nd pipe 12. Therefore, the oil O can be easily delivered to the 1 st pipe 11 and the 2 nd pipe 12.

The oil O delivered to the 3 rd flow path 92c by the oil pump 96 flows from the inflow flow path portion 94a into the 4 th flow path 94. As shown in fig. 5, the oil O flowing into the inflow channel portion 94a flows to the rear side (-X side), branches via the branch portion 94b, and flows into the 1 st branch channel portion 94c and the 2 nd branch channel portion 94f, respectively. The oil O flowing into the 1 st branch flow path portion 94c flows into the 1 st pipe 11 from the left end (+y side) of the 1 st pipe 11. The oil O flowing into the 1 st pipe 11 flows rightward (-Y side) in the 1 st pipe 11 and is supplied to the stator 30 from the 1 st oil supply port 13 and the 2 nd oil supply port 14. On the other hand, the oil O flowing into the 2 nd branch flow path portion 94f flows into the 2 nd pipe 12 from the left end portion of the 2 nd pipe 12. The oil O flowing into the 2 nd pipe 12 flows rightward in the 2 nd pipe 12 and is supplied from the 3 rd oil supply port 15 to the stator 30.

In this way, the oil O can be supplied from the 1 st pipe 11 and the 2 nd pipe 12 to the stator 30, and the stator 30 can be cooled. The oil O flowing into the inflow channel portion 94a can be branched at the 1 st branch channel portion 94c and the 2 nd branch channel portion 94f and supplied to the 1 st pipe 11 and the 2 nd pipe 12, respectively. Therefore, compared to the case where the oil O is caused to flow from one pipe 10 to the other pipe 10 of the 1 st pipe 11 and the 2 nd pipe 12, the amount of the oil O supplied to the 1 st pipe 11 is easily suppressed from being deviated from the amount of the oil O supplied to the 2 nd pipe 12. In addition, the path for supplying the oil O to each tube 10 is easily shortened at the same time, so that the temperature of the oil O supplied to the stator 30 is easily maintained relatively low. Therefore, the stator 30 is easily and appropriately cooled.

The oil O supplied from the 1 st pipe 11 and the 2 nd pipe 12 to the stator 30 drops downward and is accumulated in a lower region in the motor housing 61. The oil O stored in the lower region of the motor housing 61 moves to the oil reservoir P of the gear housing 62 through the partition wall opening 68 provided in the partition wall 63. As described above, the 2 nd oil passage 92 supplies the oil O to the stator 30.

The cooler 97 shown in fig. 2 cools the oil O passing through the 2 nd oil passage 92. The cooler 97 is connected to the 2 nd and 3 rd channels 92b and 92 c. The 2 nd flow path 92b and the 3 rd flow path 92c are connected via an internal flow path of the cooler 97. A cooling water pipe 98 through which cooling water cooled by a radiator, not shown, passes is connected to the cooler 97. The oil O passing through the cooler 97 is cooled by exchanging heat with the cooling water passing through the cooling water pipe 98.

According to the present embodiment, the 4 th flow path 94 through which the oil O as the refrigerant flows has the 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94f branched from the inflow flow path portion 94a via the branching portion 94b. The branch portion 94b has an opening 94g that opens to one side in the thickness direction of the partition wall 63, and the opening 94g is closed by the plug member 64. In this way, since the branch portion 94b has the opening 94g, the hole 63b recessed in the thickness direction with respect to the partition wall 63 provided with the 4 th flow channel 94 can be formed, and the branch portion 94b can be easily provided in the partition wall 63 by closing the opening 94g, which is one end of the hole 63 b. Therefore, the 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94f can be easily provided as flow path portions branching in the partition wall 63.

Specifically, in the present embodiment, by providing the hole 63b, the hole processing can be performed on the partition wall 63 through the inside of the hole 63b, and the 2 nd branch flow path 94f can be easily produced. This facilitates the provision of a plurality of branched flow paths in the casing 6, without requiring piping or the like to be laid outside the casing 6. Therefore, according to the present embodiment, the driving device 1 can be prevented from being enlarged.

In addition, according to the present embodiment, the 4 th flow passage 94 is provided in the partition wall 63 located on the left side of the stator 30. Therefore, the 4 th flow passage 94 can be disposed at a position overlapping the stator 30 in the axial direction. Thus, the 4 th flow channel 94 is easily arranged so as to avoid interference with the fixed portion 32b of the stator 30. Further, compared with a case where, for example, the 4 th flow path 94 is provided on the radially outer side of the stator 30, the housing 6 can be suppressed from being enlarged in the radial direction. Therefore, the driving device 1 can be further suppressed from becoming larger.

In addition, according to the present embodiment, the opening 94g is opened toward the gear housing 62. The gear housing portion 62 is easily smaller in axial dimension than the motor housing portion 61. Therefore, the distance from the opening of the housing main body 6a on the side of the gear housing portion 62 to the axial direction of the partition wall 63 is easily smaller than the distance from the opening of the housing main body 6a on the side of the motor housing portion 61 to the axial direction of the partition wall 63. Thus, when the hole 63b is formed by hole processing, the distance from the opening of the gear housing 62 to the partition wall 63 is short, and the hole processing of the partition wall 63 is easy. Therefore, the hole 63b can be easily formed, and the branch 94b can be more easily provided in the partition wall 63. The opening 94g opens to the gear housing 62, and a 2 nd branch flow path 94f from the branch 94b to the motor housing 61 can be formed by hole processing through the opening 94 g. This makes it possible to easily supply the oil O to the stator 30 in the motor housing 61 via the 2 nd branch flow path portion 94f.

In addition, according to the present embodiment, the 1 st branch flow path portion 94c extends from the branch portion 94b to the 1 st pipe 11, and the 2 nd branch flow path portion 94f extends from the branch portion 94b to the 2 nd pipe 12. Therefore, the oil O can be delivered from the 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94f to the 1 st pipe 11 and the 2 nd pipe 12, respectively. Thereby, the oil O can be supplied to the stator 30 from the oil supply ports provided in the 1 st pipe 11 and the 2 nd pipe 12, respectively, and the stator 30 can be cooled.

The 1 st pipe 11 and the 2 nd pipe 12 are connected to each other through a 4 th flow path 94 as a refrigerant flow path. Therefore, for example, by supplying the oil O to the inflow channel portion 94a of the 4 th channel 94 as in the present embodiment, the oil O can be supplied to both the 1 st pipe 11 and the 2 nd pipe 12. That is, the oil passage provided in the housing 6 can be reduced as compared with the case where the oil passages for supplying the oil O to the 1 st pipe 11 and the 2 nd pipe 12 are separately provided. Therefore, the housing 6 can be prevented from being enlarged. This can further suppress the driving device 1 from becoming larger.

Further, since the 4 th flow passage 94 is provided in the partition wall 63 of the housing 6, the entire drive device 1 can be easily miniaturized as compared with a case where a flow passage connecting the 1 st pipe 11 and the 2 nd pipe 12 by piping or the like is provided outside the housing 6. Therefore, according to the present embodiment, the driving device 1 can be further suppressed from being enlarged.

For example, the ease of conveying the oil O into each branch flow path portion may be different depending on the arrangement relation such as the position at which the oil O is conveyed into each branch flow path portion. In this case, the amount of oil O delivered from each branch flow path portion to each pipe varies, and cooling of the stator 30 may be defective.

In contrast, according to the present embodiment, the angle θ3 is larger than the angle θ4 when viewed in the thickness direction of the partition wall 63, the angle θ3 being an angle between the direction in which the inflow channel portion 94a extends from the branch portion 94b and the direction in which the 1 st branch channel portion 94c extends from the branch portion 94b, and the angle θ4 being an angle between the direction in which the inflow channel portion 94a extends from the branch portion 94b and the direction in which the 2 nd branch channel portion 94f extends from the branch portion 94 b. Therefore, the change in the flow direction of the oil O when the oil O flows from the inflow passage portion 94a into the 1 st branch passage portion 94c is smaller than the change in the flow direction of the oil O when the oil O flows from the inflow passage portion 94a into the 2 nd branch passage portion 94 f. This makes it possible to make the oil O flow from the branch portion 94b to the 1 st branch flow path portion 94c easier than the 2 nd branch flow path portion 94 f. Therefore, for example, in the case where the oil O is less likely to be fed into the 1 st branch flow path portion 94c than the 2 nd branch flow path portion 94f is, the oil O is less likely to be fed into the 1 st branch flow path portion 94c, and the oil O can be easily fed to both the 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94f to the same extent. This makes it possible to easily convey the oil O to the same extent to both the 1 st pipe 11 and the 2 nd pipe 12 via the respective branch flow path portions. Therefore, occurrence of a failure in cooling of the stator 30 can be suppressed.

The arrangement relation in which the oil O is less likely to be fed to the 1 st branch flow path portion 94c than the 2 nd branch flow path portion 94f is, for example, an arrangement relation in which the upper end portion of the 1 st branch flow path portion 94c is located above the upper end portions of the branch portion 94b and the 2 nd branch flow path portion 94f as in the present embodiment. In this case, it may be difficult to convey the oil O into the 1 st branch flow path portion 94c to such an extent that the oil O needs to be conveyed to a position above the 2 nd branch flow path portion 94 f. In contrast, according to the present embodiment, since the above-described difficulty in conveying the oil O to the 1 st branch flow path portion 94c can be suppressed, the oil O can be easily conveyed to the same extent to both the 1 st branch flow path portion 94c and the 2 nd branch flow path portion 94 f. That is, in a configuration in which the upper end of the 1 st branch flow path portion 94c is located above the upper ends of the branch portions 94b and 2 nd branch flow path portion 94f, the effect of suppressing the difficulty in conveying the oil O to the 1 st branch flow path portion 94c is particularly useful.

In addition, according to the present embodiment, the 2 nd branch flow path portion 94f is located in a region on the side (+x side) of the inflow flow path portion 94a, and the 1 st branch flow path portion 94c is located in a region on the opposite side of the inflow flow path portion 94a, based on the virtual line IL when viewed in the thickness direction of the partition wall 63. Therefore, the direction of the oil O flowing in one of the branch flow path portions is the same as the direction of the oil O flowing in the inflow flow path portion 94a, and the direction of the oil O flowing in the other branch flow path portion is opposite to the direction of the oil O flowing in the inflow flow path portion 94 a. This makes it possible to easily flow the oil O from the inflow channel portion 94a into one of the branch channel portions, and makes it possible to prevent the oil O from easily flowing from the inflow channel portion 94a into the other of the branch channel portions. Therefore, for example, the direction of the flow of the oil O in the respective branch flow path portions in the front-rear direction is determined in accordance with the difficulty of conveying the oil O from the respective branch flow path portions to the respective pipes, etc., whereby the oil O can be easily conveyed to the same extent into the respective branch flow path portions and the respective pipes.

Specifically, in the present embodiment, the 1 st pipe 11 is located above the 2 nd pipe 12, and the distance from the branch portion 94b is also large. Therefore, it is difficult to convey the oil O from the 1 st branch flow path portion 94c to the 1 st pipe 11, as compared with the case of conveying the oil O from the 2 nd branch flow path portion 94f to the 2 nd pipe 12. In contrast, the direction of the oil O flowing in the 1 st branch flow path portion 94c in the front-rear direction is the same as the direction of the oil O flowing in the inflow flow path portion 94a in the front-rear direction. The direction of the oil O flowing in the 2 nd branch flow path portion 94f in the front-rear direction is opposite to the direction of the oil O flowing in the inflow flow path portion 94a in the front-rear direction. Therefore, the oil O from the inflow path portion 94a can be relatively easily fed into the 1 st branch path portion 94 c. This makes it possible to easily convey the oil O to the same extent to both the 1 st pipe 11 and the 2 nd pipe 12 via the respective branch flow path portions.

In addition, according to the present embodiment, the 4 th flow path 94 has a portion passing through a position radially inward of the fixed portion 32 b. Therefore, the 4 th flow channel 94 is more easily arranged so as to avoid the fixed portion 32b, and the housing 6 can be further prevented from being enlarged in the radial direction. Therefore, the driving device 1 can be further suppressed from becoming larger.

Further, according to the present embodiment, the 1 st pipe 11 and the 2 nd pipe 12 are arranged with the fixing portion 32b interposed therebetween in the circumferential direction. Therefore, the 1 st pipe 11 and the 2 nd pipe 12 can be arranged at positions where they do not interfere with the fixing portion 32b, and the 1 st pipe 11 and the 2 nd pipe 12 can be arranged radially close to the stator core main body 32a. Therefore, the oil O can be easily supplied from the 1 st pipe 11 and the 2 nd pipe 12 to the stator 30, and the driving device 1 can be restrained from being enlarged in the radial direction.

Further, according to the present embodiment, the 1 st pipe 11 and the 2 nd pipe 12 extend linearly in the axial direction. Therefore, compared with the case where the 1 st pipe 11 and the 2 nd pipe 12 are bent and extended in the radial direction or the like, the drive device 1 can be suppressed from being enlarged in the radial direction. Further, since the shape of the 1 st pipe 11 and the shape of the 2 nd pipe 12 can be made simple, the 1 st pipe 11 and the 2 nd pipe 12 can be easily manufactured. Further, the 1 st pipe 11 and the 2 nd pipe 12 are easily disposed to face the stator 30 over a wide range in the axial direction. Therefore, the oil O is easily supplied from the 1 st pipe 11 and the 2 nd pipe 12 to a wide range in the axial direction of the stator 30. Therefore, the stator 30 can be cooled more effectively.

Further, according to the present embodiment, the motor axis J1 extends in the horizontal direction perpendicular to the vertical direction. Therefore, by supplying the oil O from the pipe 10 to the upper side of the stator 30, the oil O can flow from the upper side to the lower side of the stator 30 by gravity. This facilitates the supply of the oil O to the entire stator 30, and facilitates the cooling of the entire stator 30 by the oil O.

Specifically, in the present embodiment, the 1 st pipe 11 is located on the upper side of the stator 30, and the 1 st oil supply port 13 and the 2 nd oil supply port 14 of the 1 st pipe 11 are directed downward. Therefore, the oil O can be discharged downward from the 1 st pipe 11 toward the stator 30. This makes it possible to easily cool the entire stator 30 by flowing the oil O from the 1 st pipe 11 from the upper side to the lower side of the stator 30 by gravity.

In the present embodiment, the 2 nd pipe 12 is positioned on the front side of the stator 30, and the 3 rd oil supply port 15 of the 2 nd pipe 12 is directed upward. Therefore, the oil O discharged upward from the 3 rd oil supply port 15 can be supplied to the upper portion of the stator 30. This makes it possible to easily cool the entire stator 30 by flowing the oil O from the 2 nd pipe 12 from the upper side to the lower side of the stator 30 by gravity. In particular, in the present embodiment, the 3 rd oil supply port 15 is inclined rearward upward. Therefore, the oil O discharged from the 3 rd oil supply port 15 is easily made to reach the upper side portion of the stator 30. This facilitates the cooling of the stator 30 by the oil O discharged from the 2 nd pipe 12.

In addition, according to the present embodiment, the 2 nd oil supply port 14 of the 1 st pipe 11 and the 3 rd oil supply port 15 of the 2 nd pipe 12 are supply ports for supplying the oil O to the stator core 32. Therefore, the stator core 32 can be appropriately cooled by the oil O supplied from the 1 st pipe 11 and the 2 nd pipe 12.

In the present embodiment, as shown in fig. 4, the 1 st pipe 11 is located at the rear side of the upper fixing portion 32 b. Therefore, the oil O discharged from the 2 nd oil supply port 14 of the 1 st pipe 11 easily flows to the rear side of the upper fixing portion 32 b. This makes it easy to supply the oil O to the rear portion of the stator core 32 by the 1 st pipe 11. On the other hand, the 2 nd pipe 12 is located at a position forward of the upper fixing portion 32 b. Therefore, the oil O discharged upward from the 3 rd oil supply port 15 of the 2 nd pipe 12 is easily supplied to a portion on the front side of the upper fixing portion 32 b. Thus, the oil O is easily supplied to the front portion of the stator core 32 by the 2 nd pipe 12. Therefore, the 1 st pipe 11 and the 2 nd pipe 12 can easily supply the oil O to both sides of the stator core 32 in the front-rear direction, and the entire stator core 32 can be easily cooled.

In addition, according to the present embodiment, the 1 st oil supply port 13 of the 1 st pipe 11 is a supply port for supplying the oil O to the coil ends 33a, 33b. Therefore, the coil ends 33a, 33b can be cooled appropriately by the oil O supplied from the 1 st pipe 11. In the present embodiment, the 1 st pipe 11 is located on the upper side of the stator 30, and therefore the oil O from the 1 st oil supply port 13 can be supplied from the upper side of the coil ends 33a, 33b. This makes it possible to flow the oil O from the 1 st oil supply port 13 from the upper side to the lower side of the coil ends 33a and 33b by gravity. Therefore, the oil O is easily supplied to the entire coil ends 33a, 33b, and the entire coil ends 33a, 33b are easily cooled.

Further, according to the present embodiment, the 1 st oil supply ports 13 of the 1 st pipes 11 are disposed above the coil ends 33a and 33b, respectively. Therefore, the amount of oil O supplied from the 1 st pipe 11 to the coil ends 33a and 33b can be made large. This allows the coil 31, which is a heating element, to be appropriately cooled, and the stator 30 to be more favorably cooled.

In addition, according to the present embodiment, the plurality of 1 st oil supply ports 13 located above the coil ends 33a, 33b are arranged in a zigzag manner in the circumferential direction. Therefore, the plurality of 1 st oil supply ports 13 arranged in the circumferential direction are alternately arranged with their axial positions shifted. Thus, the oil O is easily supplied to the entirety of the coil ends 33a, 33b, compared to the case where the axial positions of the plurality of 1 st oil supply ports 13 located on the upper side of the coil ends 33a, 33b are identical to each other.

In addition, according to the present embodiment, the 1 st oil supply port 13 located on the upper side of each coil end 33a, 33b includes the 1 st oil supply port 13 directed obliquely forward to the lower side and the 1 st oil supply port 13 directed obliquely rearward to the lower side. Therefore, the oil O supplied from the 1 st oil supply ports 13 is easily supplied to both the front and rear portions of the coil ends 33a, 33b, and the oil O is easily supplied to the entire coil ends 33a, 33 b. This can cool the coil ends 33a and 33b better, and thus can cool the stator 30 better.

In addition, according to the present embodiment, the right end of the 1 st pipe 11 is closed by the mounting member 16, and the right end of the 2 nd pipe 12 is closed by the mounting member 17. In the present embodiment, the right end of the 1 st pipe 11 is the end opposite to the side where the oil feed O flows into the 1 st pipe 11. The right end of the 2 nd pipe 12 is an end opposite to the side where the oil supply O flows into the 2 nd pipe 12. That is, the end portion on the opposite side to the side into which the oil supply O flows in the axial end portion of each tube is closed. Therefore, the pressure of the oil O flowing in each pipe is easily increased compared to the case where the end portion on the opposite side to the side where the oil O flows in is opened in the axial end portion of each pipe. This facilitates the strong injection of the oil O from the oil supply ports of the respective tubes. Therefore, the oil O discharged from each oil supply port is easily supplied to the stator 30 appropriately.

In particular, in the 2 nd pipe 12 of the present embodiment, the 3 rd oil supply port 15 is directed upward. Therefore, the oil O can be strongly injected upward from the 3 rd oil supply port 15. This facilitates the oil O discharged from the 3 rd oil supply port 15 to reach the portion of the stator core 32 located further upward. Therefore, the oil O discharged from the 2 nd pipe 12 is easily supplied to a wide range of the stator core 32, and the stator core 32 can be cooled more effectively.

The present invention is not limited to the above-described embodiments, and other configurations can be adopted within the scope of the technical idea of the present invention. In the above embodiment, the case where the refrigerant is the oil O has been described, but the present invention is not limited thereto. The refrigerant is not particularly limited as long as it can be supplied to the stator to cool the stator. The refrigerant may be, for example, an insulating liquid or water. In the case where the refrigerant is water, the surface of the stator may be subjected to an insulation treatment.

The refrigerant flow path has a1 st flow path portion, a 2 nd flow path portion, a 3 rd flow path portion, and a branching portion, and may have any shape as long as the refrigerant flow path is provided in a wall portion of the casing. The direction in which the 1 st flow path portion extends, the direction in which the 2 nd flow path portion extends, and the direction in which the 3 rd flow path portion extends are not particularly limited. The 2 nd channel portion may not be connected to the 1 st pipe. The 3 rd channel part may not be connected to the 2 nd pipe. The refrigerant flow path may have a 4 th flow path portion different from the 1 st flow path portion, the 2 nd flow path portion, and the 3 rd flow path portion. The 4 th flow path portion may be a flow path portion branched from the branching portion, or may be a flow path portion branched from any one of the 1 st flow path portion, the 2 nd flow path portion, and the 3 rd flow path portion.

The wall of the case provided with the refrigerant flow path is not particularly limited. The refrigerant flow path may be provided in an outer wall portion of the casing. For example, in the above embodiment, the 1 st cover member 61b may be provided with a refrigerant flow path. The hole portion constituting the branch portion may be a through hole penetrating the wall portion of the housing. In this case, the other end portion in the thickness direction of the hole portion is also closed by the plug member.

The flow pattern of the refrigerant in the refrigerant flow path is not particularly limited. For example, the refrigerant may flow into any two of the 1 st flow path portion, the 2 nd flow path portion, and the 3 rd flow path portion, and the refrigerant may merge in the remaining one flow path portion. That is, two of the flow path portions may be a refrigerant introduction portion for introducing the refrigerant into the branch portion, and the remaining one of the flow path portions may be a refrigerant discharge portion for discharging the refrigerant from the branch portion. In addition, the following structure may be adopted: the refrigerant flows into any of the 1 st flow path portion, the 2 nd flow path portion, and the 3 rd flow path portion, merges in the branching portion, and flows from the branching portion to the other flow path. That is, three flow paths may be refrigerant introduction portions for introducing the refrigerant into the branch portions, and the other flow paths may be refrigerant discharge portions for discharging the refrigerant from the branch portions.

The plug member may be any member as long as it can close one end portion in the thickness direction of the hole portion. The plug member may be a member that is pressed into the hole portion to close the opening of the hole portion. The plug member may be fixed by welding, adhesion, or the like to close the opening of the hole. The sealing portion may not be provided.

The 1 st pipe and the 2 nd pipe may be disposed at any positions as long as they are disposed at intervals in the circumferential direction on the radial outer side of the stator. For example, at least one of the 1 st pipe and the 2 nd pipe may be located at the lower side of the stator or may be located at the rear side of the stator. The 1 st tube and the 2 nd tube may be disposed on the same side with respect to the stator. For example, both the 1 st pipe and the 2 nd pipe may be located above the stator.

The shape of the 1 st tube and the shape of the 2 nd tube are not particularly limited. The 1 st pipe and the 2 nd pipe can be square cylinder. The 1 st pipe and the 2 nd pipe can be bent and extended or can be curved and extended. The refrigerant supply port of the 1 st tube may be provided at least in one. The refrigerant supply port of the 2 nd tube may be provided at least in one. The refrigerant supply port may be a port for supplying the refrigerant to the stator, and may not include a port for supplying the refrigerant to the stator core, or may not include a port for supplying the refrigerant to the coil end. In the 1 st and 2 nd pipes, the end portion on the opposite side to the side into which the refrigerant flows may be opened.

Other tubes than the 1 st tube and the 2 nd tube may be provided. In this case, the other tube may or may not have a refrigerant supply port for supplying the refrigerant to the stator, as in the 1 st tube and the 2 nd tube. The other tube may have a supply port for supplying oil as a lubricant to the rotor and the like. The 1 st tube and the 2 nd tube may not be provided. The pump may be a mechanical pump. The pump may not be provided.

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

The application of the driving device is not particularly limited. The drive device may not be mounted on the vehicle. The structures described in the present specification can be appropriately combined within a range not contradicting each other.

Claims

1. A driving device, comprising:

A motor; and

A housing which houses the motor therein,

The housing has a wall portion provided with a refrigerant flow path through which a refrigerant flows,

The refrigerant flow path has:

a1 st flow path portion;

A branching portion connected to the 1 st flow path portion;

A2 nd flow path portion and a3 rd flow path portion which are branched from the branching portion with respect to the 1 st flow path portion and extend,

The branch part has an opening part which is opened to one side of the wall part in the thickness direction,

The opening is closed by a plug member,

The 3 rd flow path portion is overlapped with a part of the opening portion when viewed in a direction in which the 3 rd flow path portion extends from the branching portion, and the 3 rd flow path portion extends in a direction different from a direction in which the opening portion opens.

2. The driving device according to claim 1, wherein,

The motor has:

A rotor rotatable about a motor axis; and

A stator located radially outward of the rotor,

The wall portion is located on one axial side of the stator.

3. The driving device according to claim 2, wherein,

The drive device also has a transmission device connected to the motor,

The housing has:

A1 st housing unit that houses the motor therein; and

A 2 nd storage unit for storing the transfer device therein,

The wall portion is a partition wall that divides the inside of the 1 st housing portion and the inside of the 2 nd housing portion,

The opening portion is opened toward the 2 nd housing portion side.

4. The driving device according to claim 2, wherein,

The drive device further includes a1 st pipe and a2 nd pipe, the 1 st pipe and the 2 nd pipe being located radially outside the stator and being arranged at intervals in a circumferential direction around the motor axis,

The 1 st pipe and the 2 nd pipe are respectively provided with a refrigerant supply port for supplying the refrigerant to the stator,

The 2 nd flow path portion extends from the branching portion to the 1 st pipe,

The 3 rd flow path portion extends from the branching portion to the 2 nd pipe.

5. The driving device according to claim 1, wherein,

The opening diameter of the opening is larger than the inner diameter of the 2 nd flow path portion and the inner diameter of the 3 rd flow path portion.

6. The driving device according to any one of claims 1 to 5, wherein,

The 1 st flow path portion is a refrigerant introduction portion that allows the refrigerant to flow into the branching portion, and the 2 nd flow path portion and the 3 rd flow path portion are refrigerant discharge portions that allow the refrigerant to flow out of the branching portion.

7. The driving device according to claim 6, wherein,

When viewed in the thickness direction of the sheet,

The angle formed by the direction in which the 1 st flow path portion extends from the branching portion and the direction in which the 2 nd flow path portion extends from the branching portion is larger than the angle formed by the direction in which the 1 st flow path portion extends from the branching portion and the direction in which the 3 rd flow path portion extends from the branching portion.

8. The driving device according to claim 7, wherein,

An end portion of the 2 nd flow path portion on the upper side in the vertical direction is located on the upper side in the vertical direction than an end portion of the branching portion and the 3 rd flow path portion on the upper side in the vertical direction.

9. The driving device according to claim 6, wherein,

With the reference to the imaginary line of the line,

The 3 rd flow path portion is located in a region on the side where the 1 st flow path portion is located,

The 2 nd flow path portion is located in a region on the opposite side to the 1 st flow path portion,

The virtual line extends in a direction perpendicular to an extending direction in which the 1 st flow path portion extends, and passes through a center of the branch portion in the extending direction, as viewed in the thickness direction.

10. The driving device according to claim 1, wherein,

An internal thread part is arranged on the inner peripheral surface of the branch part,

The bolt member is a bolt screwed into the female screw portion.

11. The driving device according to claim 10, wherein,

The driving device is provided with a sealing portion that seals between the opening periphery of the branch portion and the bolt head portion of the bolt member.

12. The driving device according to claim 1, wherein,

The drive device is mounted on a vehicle and rotates an axle of the vehicle.