JP2021010217A - Drive device - Google Patents

Abstract

To provide a drive device having a motor provided with a path for supplying cooling oil to a plurality of pipes, and suppressing upsizing.SOLUTION: A drive device includes: a motor having a rotor and a stator located radially outward of the rotor; a first pipe 11 and a second pipe 12 located radially outside the stator and spaced apart in a circumferential direction about a motor shaft; a housing 6 for housing the motor, the first pipe, and the second pipe therein; and a refrigerant passage 94 for connecting the first pipe and the second pipe and allowing a refrigerant to flow therein. The first pipe and the second pipe each have a refrigerant supply port for supplying a refrigerant to the stator. The housing has an axial wall section 61c located on one axial side of the stator. A refrigerant passage is provided in an axial wall section.SELECTED DRAWING: Figure 4

Description

The present invention relates to a drive device.

A rotary electric machine having a structure for cooling a stator is known. For example, Patent Document 1 describes a rotary electric machine that cools a stator by supplying cooling oil to a stator core main body from a plurality of pipes.

JP-A-2019-9967

In the rotary electric machine as described above, a path for supplying cooling oil to a plurality of pipes is provided. Such a path needs to be arranged so as to avoid interference with the fixed portion of the stator or the like. Therefore, for example, it is conceivable to crawl a pipe or the like on the outside of the housing of the rotary electric machine to provide such a path. However, in this case, there is a problem that the entire rotary electric machine tends to be large.

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

One aspect of the drive device of the present invention is a motor having a rotor rotatable about a motor shaft, a stator located radially outside the rotor, and a motor shaft located radially outside the stator. A first pipe and a second pipe arranged at intervals in the circumferential direction centered on the motor, a housing for accommodating the motor, the first pipe, and the second pipe, and the first pipe and the above. It is provided with a refrigerant flow path that connects to the second pipe and allows the refrigerant to flow inside. The first pipe and the second pipe each have a refrigerant supply port for supplying the refrigerant to the stator. The housing has an axial wall portion located on one side of the stator in the axial direction. The refrigerant flow path is provided on the axial wall portion.

According to one aspect of the present invention, it is possible to prevent the drive device including the motor from becoming large.

FIG. 1 is a schematic configuration diagram schematically showing a driving device of the present embodiment. FIG. 2 is a perspective view showing the stator, the first pipe, and the second pipe of the present embodiment. FIG. 3 is a cross-sectional view showing a part of the driving device of the present embodiment, and is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a cross-sectional view showing a part of the driving device of the present embodiment, and is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a perspective view showing the first pipe of the present embodiment.

In the following description, the vertical direction will be defined and described based on the positional relationship when the drive device 1 of the present 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 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 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. The front-back direction and the left-right direction are horizontal directions orthogonal to the vertical direction. In the following embodiments, the left side corresponds to one side in the axial direction, and the front side corresponds to one side in the horizontal 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.

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, an oil pump 96, a cooler 97, a pipe 10, and an inverter unit. 8 and.

The housing 6 houses the motor 2 and the transmission device 3 inside. The housing 6 has a motor accommodating portion 61, a gear accommodating portion 62, and a partition wall 61c. The motor accommodating portion 61 is a portion that accommodates the rotor 20 and the stator 30, which will be described later, inside. The gear accommodating portion 62 is a portion accommodating the transmission device 3 inside. The gear accommodating portion 62 is located on the left side of the motor accommodating portion 61. The bottom portion 61a of the motor accommodating portion 61 is located above the bottom portion 62a of the gear accommodating portion 62. The partition wall 61c axially partitions the inside of the motor accommodating portion 61 and the inside of the gear accommodating portion 62. 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 61 and the inside of the gear accommodating portion 62. The partition wall 61c is located on the left side of the stator 30. That is, in the present embodiment, the partition wall 61c corresponds to the axial wall portion located on one side in the axial direction of the stator 30.

The housing 6 houses the oil O as a refrigerant inside. In the present embodiment, the oil O is housed inside the motor housing part 61 and inside the gear housing part 62. An oil sump P for accumulating oil O is provided in a lower region inside the gear accommodating portion 62. The oil O in the oil sump P is sent to the inside of the motor accommodating portion 61 by an oil passage 90 described later. The oil O sent to the inside of the motor accommodating portion 61 collects in the lower region inside the motor accommodating portion 61. At least a part of the oil O accumulated inside the motor accommodating portion 61 moves to the gear accommodating portion 62 through 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 61 means that the oil O is located inside the motor housing portion 61 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 61 may have moved to the gear accommodating portion 62 through the partition wall opening 68. A part of the oil O sent to the inside of the motor accommodating portion 61 by the oil passage 90 described later may remain inside the motor accommodating portion 61 when the motor 2 is stopped.

The oil O circulates in the oil passage 90 described later. 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, and bearings 26 and 27. The rotor 20 can rotate about the 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 61 and the gear housing portion 62 of the housing 6. The left end of the shaft 21 projects into the gear accommodating portion 62. 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 61. As shown in FIGS. 2 and 3, the stator core 32 has a stator core main body 32a and a fixing portion 32b. As shown in FIG. 3, the stator core main body 32a has a cylindrical core back 32d extending in the axial direction and a plurality of teeth 32e extending radially inward from the core back 32d. The plurality of teeth 32e are arranged at equal intervals over one circumference along the circumferential direction.

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 housing 6. A plurality of fixed portions 32b are provided at intervals along the circumferential direction. For example, four fixing portions 32b are provided. The four fixing portions 32b are arranged at equal intervals over one circumference in the circumferential direction.

One of the fixing portions 32b projects upward from the stator core main body 32a. The other one of the fixing portions 32b projects downward from the stator core main body 32a. The other one of the fixing portions 32b projects from the stator core main body 32a to the front side (+ X side). The remaining one of the fixing portions 32b projects 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. 2, the fixing portion 32b extends in the axial direction. The fixing portion 32b extends from, for example, the left end (+ Y side) end of the stator core body 32a to the right side (−Y side) end of the stator core body 32a. The fixing portion 32b has a through hole 32c that penetrates the fixing portion 32b in the axial direction. As shown in FIG. 3, a bolt 34 extending in the axial direction is passed through the through hole 32c. The bolt 34 is passed through the through hole 32c from the right side (−Y side) and tightened into the female screw hole 35 shown in FIG. The female screw hole 35 is provided in the partition wall 61c. By tightening the bolt 34 into the female screw hole 35, the fixing portion 32b is fixed to the partition wall 61c. In this way, the stator 30 is fixed to the housing 6 by bolts 34.

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 the teeth 32e 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 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. As shown in FIG. 2, in the present embodiment, the coil ends 33a and 33b have an annular shape centered on 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.

As shown in FIG. 1, bearings 26 and 27 rotatably support the rotor 20. The bearings 26 and 27 are, for example, ball bearings. 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 61b of the motor accommodating portion 61 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 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 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. 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 gear 4 and the differential device 5. 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 61 and the inside of the gear accommodating portion 62.

In addition, in this specification, "oil passage" means the route of oil. 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 62.

The scooping path 91a is a path in which the oil O is scooped up from the oil reservoir 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 S of the oil sump P is high, such as immediately after the motor 2 is driven, the first reservoir 93 is scraped up by the second gear 42 and the third gear 43 in addition to the ring gear 51. Also receives oil 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 downward and accumulated in the lower region in the motor accommodating portion 61. The oil O accumulated in the lower region in the motor accommodating portion 61 moves to the gear accommodating portion 62 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 and supplied to the stator 30. An oil pump 96, a cooler 97, and a pipe 10 are provided in the second oil passage 92. The second oil passage 92 has a first flow path 92a, a second flow path 92b, a third flow path 92c, and a fourth flow path 94. In the present embodiment, the fourth flow path 94 corresponds to a refrigerant flow path through which oil O as a refrigerant flows. That is, the drive device 1 of the present embodiment includes a fourth flow path 94 as a refrigerant flow path.

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 connects the cooler 97 and the fourth flow path 94. The third flow path 92c is provided, for example, on the wall portion on the front side (+ X side) of the wall portion of the motor accommodating portion 61.

The fourth flow path 94 is provided in the partition wall 61c. The fourth flow path 94 connects the first pipe 11 and the second pipe 12 of the pipe 10, which will be described later. As shown in FIG. 4, the fourth flow path 94 has an inflow portion 94a, a first branch portion 94c, and a second branch portion 94f. The inflow portion 94a is a portion of the fourth flow path 94 in which the oil O flows in from the third flow path 92c. The inflow portion 94a extends from the third flow path 92c to the rear side (−X side). The inflow 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 portion 94a is large at the front end portion. In the present embodiment, the front end of the inflow portion 94a is the radial outer end of the inflow portion 94a.

The front end (+ X side) end of the inflow portion 94a is located radially outside the fixing portion 32b. The rear end (−X side) end of the inflow portion 94a is located radially inside the fixing portion 32b. That is, in the present embodiment, the inflow portion 94a extends in the front-rear direction from the radially outer side of the fixed portion 32b to the radial inner side of the fixed portion 32b. The inflow portion 94a is located above the fixed portion 32b on the front side (+ X side).

The rear end (−X side) end of the inflow portion 94a is a connecting portion 94b in which the first branch portion 94c and the second branch portion 94f are connected, respectively. The inner diameter of the inflow portion 94a is larger at the connection portion 94b. The connecting portion 94b is located radially inside the fixed portion 32b.

The portion of the inflow portion 94a excluding the connecting portion 94b is made by drilling a hole from the front side (+ X side) of the housing 6, for example. The front end of the inflow portion 94a is closed by tightening the bolt 95a. The connecting portion 94b of the inflow portion 94a is made, for example, by drilling a hole from the left side (+ Y side) of the partition wall 61c. Although not shown, the left end of the connecting portion 94b is closed by tightening a bolt.

The first branch portion 94c is a portion that branches from the inflow portion 94a and extends to the first pipe 11 described later. The first branch portion 94c extends diagonally upward and rearward from the rear end (−X side) end of the inflow portion 94a, that is, the connection portion 94b. The first branch portion 94c extends to the upper end portion of the partition wall 61c through a portion of the partition wall 61c that is lower than the upper fixing portion 32b and located on the upper side of the shaft 21. The radial position at the upper end of the first branch portion 94c is substantially the same as the radial position of the fixed portion 32b. The upper end of the first branch 94c is located posterior to the upper fixing 32b.

The first branching portion 94c has an extending portion 94d extending linearly upward and diagonally rearward from the connecting portion 94b, and a connecting portion 94e connected to the upper end portion of the extending portion 94d. The connection portion 94e is an upper end portion of the first branch portion 94c, and is a portion to which the first pipe 11 described later is connected. The inner diameter of the connecting portion 94e is larger than the inner diameter of the extending portion 94d. The connecting portion 94e is made, for example, by drilling a hole from the upper side of the housing 6. The upper end of the connecting portion 94e is closed by tightening the bolt 95b. The stretched portion 94d is made, for example, by drilling a hole diagonally forward from the upper side of the housing 6 through the inside of the connecting portion 94e.

The second branch portion 94f is a portion that branches from the inflow portion 94a and extends to the second pipe 12, which will be described later. In the present embodiment, the second branch portion 94f extends obliquely upward on the front side from the connecting portion 94b. The second branch portion 94f is inclined to the right side (−Y side) with respect to the front-rear direction and extends linearly. The radial position at the front end (+ X side) of the second branch portion 94f is substantially the same as the radial position of the fixed portion 32b. The front end (+ X side) end of the second branching portion 94f is located above the front fixing portion 32b. The front end of the second branch 94f and the front fixing 32b are arranged at substantially the same position in the front-rear direction. The second branch portion 94f is formed, for example, by drilling a hole from the left side (+ Y side) of the partition wall 61c through the inside of the connection portion 94b.

In the fourth flow path 94, the rear portion of the inflow portion 94a, the portion of the stretched portion 94d excluding the upper end portion, and the rear portion of the second branch portion 94f are larger than the fixed portion 32b of the partition wall 61c. It is provided in a portion located inside in the radial direction. That is, in the present embodiment, the fourth flow path 94 has a portion that passes radially inside the fixed portion 32b.

As shown in FIG. 1, the pipe 10 extends in the axial direction. The left end of the pipe 10 is fixed to the partition wall 61c. As shown in FIG. 2, the pipe 10 includes a first pipe 11 and a second pipe 12. That is, the drive device 1 includes a first pipe 11 and a second pipe 12. In the present embodiment, the first pipe 11 and the second pipe 12 have a cylindrical shape extending linearly in the axial direction. The first pipe 11 and the second pipe 12 are parallel to each other. As shown in FIG. 3, the first pipe 11 and the second pipe 12 are housed inside the housing 6. The first pipe 11 and the second pipe 12 are located on the radial outer side of the stator 30. The first pipe 11 and the second pipe 12 are arranged so as to be spaced apart from each other in the circumferential direction. The radial position of the first pipe 11 and the radial position of the second pipe 12 are, for example, the same.

In the present specification, "the first pipe and the second pipe extend linearly in the axial direction of the motor shaft" is added to the case where the first pipe and the second pipe extend strictly linearly in the axial direction. , The case where the first pipe and the second pipe extend linearly in the substantially axial direction is also included. That is, in the present embodiment, "the first pipe 11 and the second pipe 12 extend linearly in the axial direction" means that, for example, the first pipe 11 and the second pipe 12 extend slightly inclined with respect to the axial direction. You may be. In this case, the direction in which the first pipe 11 is tilted with respect to the axial direction and the direction in which the second pipe 12 is tilted with respect to the axial direction may be the same or different.

In this embodiment, the first pipe 11 is located above the stator 30. In the present embodiment, the radial position of the first pipe 11 is the same as the radial position of the fixing portion 32b. The first pipe 11 is located on the rear side (−X side) of the upper fixing portion 32b. As shown in FIG. 5, the first pipe 11 includes a first pipe main body 11a, a small diameter portion 11b provided at the left (+ Y side) end of the first pipe main body 11a, and a first pipe main body. It has a small diameter portion 11c provided at the right end (−Y side) end of 11a.

The small diameter portion 11b is an end portion on the left side (+ Y side) of the first pipe 11. The small diameter portion 11c is an end portion on the right side (−Y side) of the first pipe 11. The outer diameters of the small diameter portions 11b and 11c are smaller than the outer diameter of the first pipe main body portion 11a. The small diameter portion 11b of the first pipe 11 is inserted into the partition wall 61c from the right side and fixed to the partition wall 61c. The small diameter portion 11b opens to the left. As shown in FIG. 4, the small diameter portion 11b opens into the connecting portion 94e of the first branch portion 94c. As a result, the first pipe 11 is connected to the fourth flow path 94.

As shown in FIG. 5, a mounting member 16 is provided at the right end (−Y side) of the first pipe 11. The mounting member 16 has a rectangular plate shape whose plate surface faces in the axial direction. The mounting member 16 has a recess 16a recessed from the left side (+ Y side) surface to the right side. The right end of the first pipe 11, that is, the small diameter portion 11c is fitted and fixed to the recess 16a. The right end of the first pipe 11 is closed by the mounting member 16.

The mounting member 16 has a hole 16b that penetrates the mounting member 16 in the axial direction. As shown in FIG. 2, a bolt 18 is passed through the hole 16b from the right side (−Y side). The bolt 18 penetrates the hole 16b and is fastened to the protrusion 61d shown in FIG. 3 from the right side. The protruding portion 61d protrudes inward in the radial direction on the inner peripheral surface of the motor accommodating portion 61. By tightening the bolt 18 to the protrusion 61d, the mounting member 16 is fixed to the protrusion 61d. As a result, the right end of the first pipe 11 is fixed to the motor accommodating portion 61 via the mounting member 16.

As shown in FIG. 5, the first pipe 11 has a plurality of first oil supply ports 13 and a plurality of second oil supply ports 14. In the present embodiment, the first oil supply port 13 and the second oil supply port 14 correspond to the refrigerant supply port for supplying the refrigerant to the stator 30. The oil O that has flowed into the first pipe 11 is discharged from the first oil supply port 13 and the second oil supply port 14. The first oil supply port 13 and the second oil supply port 14 are provided on the outer peripheral surface of the first pipe 11. The first oil supply port 13 and the second oil supply port 14 are holes that penetrate the first pipe 11 from the inner peripheral surface to the outer peripheral surface. The first oil supply port 13 and the second oil supply port 14 have, for example, a circular shape. As shown in FIGS. 4 and 5, the first oil supply port 13 and the second oil supply port 14 face downward.

In the present embodiment, a plurality of first oil supply ports 13 are provided at both ends of the first pipe main body portion 11a in the axial direction. For example, four first oil supply ports 13 are provided at both ends of the first pipe main body 11a in the axial direction. The four first oil supply ports 13 provided at the right (−Y side) end of the first pipe main body 11a are arranged in a zigzag manner along the circumferential direction. The four first oil supply ports 13 provided at the right end of the first pipe main body 11a are one first oil supply port 13 that opens directly below and two first oil supply ports that open diagonally forward on the lower side. It includes an oil supply port 13 and one first oil supply port 13 that opens obliquely rearward on the lower side. The four first oil supply ports 13 provided at the left (+ Y side) end of the first pipe main body 11a are provided on the right side of the first pipe main body 11a except for the axial position. It is arranged in the same manner as the four first oil supply ports 13.

As shown in FIG. 2, four first oil supply ports 13 provided on the right side (−Y side) of the plurality of first oil supply ports 13 are located above the coil end 33a. The four first oil supply ports 13 provided on the left side (+ Y side) of the plurality of first oil supply ports 13 are located above the coil ends 33b. Therefore, the oil O discharged from the first oil supply port 13 is supplied to the coil ends 33a and 33b from above. That is, in the present embodiment, the first oil supply port 13 is a supply port for supplying oil O to the coil ends 33a and 33b.

The second oil supply port 14 is provided at the central portion of the first pipe 11 in the axial direction. In the present embodiment, two second oil supply ports 14 are provided at the central portion of the first pipe main body portion 11a in the axial direction at intervals in the axial direction. As shown in FIG. 3, in the present embodiment, the second oil supply port 14 opens diagonally forward on the lower side. As shown in FIGS. 2 and 3, the second oil supply port 14 is located above the stator core 32. Therefore, the oil O discharged from the second oil supply port 14 is supplied to the stator core 32 from above. That is, in the present embodiment, the second oil supply port 14 is a supply port for supplying oil O to the stator core 32.

In the present specification, "the refrigerant supply port faces downward in the vertical direction" means that the direction of the refrigerant supply port may include a downward component, and the refrigerant supply port may face directly downward. , The refrigerant supply port may be oriented so as to be tilted with respect to the bottom. As described above, in the present embodiment, the first oil supply port 13 as the refrigerant supply port is the first oil supply port 13 facing directly below and the first oil supply port facing diagonally forward with respect to the lower side. Includes a port 13 and a first oil supply port 13 that faces diagonally rearward with respect to the bottom. Further, in the present embodiment, the second oil supply port 14 as the refrigerant supply port faces a direction obliquely inclined forward with respect to directly below. In the present embodiment, "the second oil supply port 14 faces downward" means that the second oil supply port 14 may face directly downward, for example, or is inclined rearward with respect to the direct downward direction. You may be facing.

The second pipe 12 is located on the front side (+ X side) of the stator 30. In the present embodiment, the radial position of the second pipe 12 is the same as the radial position of the fixing portion 32b. The second pipe 12 is located above the fixed portion 32b on the front side. A fixing portion 32b located on the upper side is located between the first pipe 11 and the second pipe 12 in the circumferential direction. That is, the first pipe 11 and the second pipe 12 are arranged so as to sandwich the fixing portion 32b in the circumferential direction.

As shown in FIG. 2, the second pipe 12 has a second pipe main body portion 12a and a small diameter portion 12b provided at the left side (+ Y side) end portion of the second pipe main body portion 12a. Although not shown, the second pipe 12 has a small diameter portion provided at the right (−Y side) end of the second pipe main body 12a, similarly to the first pipe 11.

The small diameter portion 12b is an end portion on the left side (+ Y side) of the second pipe 12. The outer diameter of the small diameter portion 12b is smaller than the outer diameter of the second pipe main body portion 12a. The small diameter portion 12b of the second pipe 12 is inserted into the partition wall 61c from the right side (−Y side) and fixed to the partition wall 61c. The small diameter portion 12b opens to the left. As shown in FIG. 4, the small diameter portion 12b opens at the front end (+ X side) of the second branching portion 94f. As a result, the second pipe 12 is connected to the fourth flow path 94. Therefore, the first pipe 11 and the second pipe 12 are connected to each other via the fourth flow path 94. More specifically, the first pipe 11 and the second pipe 12 are connected to each other via the first branch portion 94c, the connection portion 94b, and the second branch portion 94f.

As shown in FIG. 2, a mounting member 17 is provided at the right end (−Y side) of the second pipe 12. The mounting member 17 has a rectangular plate shape whose plate surface faces in the axial direction. The right end of the second pipe 12 is fixed to the mounting member 17 in the same manner as the first pipe 11. The right end of the second pipe 12 is closed by the mounting member 17. Although not shown, the mounting member 17 is bolted to the protruding portion 61e shown in FIG. 3 in the same manner as the mounting member 16. As a result, the right end of the second pipe 12 is fixed to the motor accommodating portion 61 via the mounting member 17. The projecting portion 61e projects inward in the radial direction on the inner peripheral surface of the motor accommodating portion 61.

As shown in FIG. 2, the second pipe 12 has a plurality of third oil supply ports 15. In the present embodiment, the third oil supply port 15 corresponds to the refrigerant supply port for supplying the refrigerant to the stator 30. The oil O that has flowed into the second pipe 12 is discharged from the third oil supply port 15. The third oil supply port 15 is provided on the outer peripheral surface of the second pipe 12. More specifically, the third oil supply port 15 is provided on the outer peripheral surface of the second pipe main body 12a. The plurality of third oil supply ports 15 are arranged at intervals along the axial direction. For example, six third oil supply ports 15 are provided. The third oil supply port 15 is a hole that penetrates the second pipe 12 from the inner peripheral surface to the outer peripheral surface. The third oil supply port 15 has, for example, a circular shape.

As shown in FIG. 3, the third oil supply port 15 faces upward. In the present embodiment, the third oil supply port 15 faces diagonally upward and rearward. The third oil supply port 15 is located on the front side (+ X side) of the stator core 32. The oil O discharged from the third oil supply port 15 is injected diagonally rearward on the upper side and supplied to the outer peripheral surface of the stator core main body 32a. That is, in the present embodiment, the third oil supply port 15 is a supply port for supplying oil O to the stator core 32.

In the present specification, "the refrigerant supply port faces upward" means that the direction of the refrigerant supply port may include an upward component, and the refrigerant supply port may face directly upward, or the refrigerant. The supply port may be oriented so as to be tilted with respect to directly above. As described above, the third oil supply port 15 of the present embodiment faces in a direction obliquely inclined rearward with respect to directly above. In the present embodiment, "the third oil supply port 15 faces upward" means that the third oil supply port 15 may face directly upward, for example, or is oriented obliquely forward with respect to the direct upward. You may be facing.

The oil pump 96 shown in FIG. 1 is a pump that sends 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 oil O from the oil sump P through the first flow path 92a, and sucks oil O from the second flow path 92b, the cooler 97, the third flow path 92c, the fourth flow path 94, and the pipe. Oil O is supplied to the motor 2 via 10. That is, the oil pump 96 sends the oil O housed inside the housing 6 to the fourth flow path 94, the first pipe 11, and the second pipe 12. Therefore, the oil O can be easily sent to the first pipe 11 and the second pipe 12.

The oil O sent to the third flow path 92c by the oil pump 96 flows into the fourth flow path 94 from the inflow portion 94a. As shown in FIG. 4, the oil O that has flowed into the inflow portion 94a flows to the rear side (−X side), branches into the first branch portion 94c and the second branch portion 94f, and flows in. The oil O that has flowed into the first branch portion 94c flows into the first pipe 11 from the left end (+ Y side) of the first pipe 11. The oil O that has flowed into the first pipe 11 flows in the first pipe 11 to the right side (−Y side), and is supplied to the stator 30 from the first oil supply port 13 and the second oil supply port 14. On the other hand, the oil O that has flowed into the second branch portion 94f flows into the second pipe 12 from the left end of the second pipe 12. The oil O that has flowed into the second pipe 12 flows to the right in the second pipe 12 and is supplied to the stator 30 from the third oil supply port 15.

In this way, the oil O can be supplied to the stator 30 from the first pipe 11 and the second pipe 12, and the stator 30 can be cooled. Further, the oil O that has flowed into the inflow portion 94a can be branched into the first branch portion 94c and the second branch portion 94f and supplied to the first pipe 11 and the second pipe 12, respectively. Therefore, the amount of oil O supplied to the first pipe 11 and the second pipe 12 are compared with the case where the oil O flows from one pipe 10 of the first pipe 11 and the second pipe 12 to the other pipe 10. It is easy to prevent a bias in the amount of oil O supplied to the pipe. Further, since it is easy to shorten the path until the oil O is supplied to each pipe 10, it is easy to keep the temperature of the oil O supplied to the stator 30 relatively low. Therefore, the stator 30 can be suitably cooled.

The oil O supplied from the first pipe 11 and the second pipe 12 to the stator 30 is dropped downward and accumulated in the lower region in the motor accommodating portion 61. The oil O accumulated in the lower region in the motor accommodating portion 61 moves to the oil sump P of the gear accommodating portion 62 via 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.

The cooler 97 shown in FIG. 1 cools the oil O passing through the second oil passage 92. A second flow path 92b and a third flow path 92c are connected to the cooler 97. The second flow path 92b and the third flow path 92c are connected via the internal flow path of the cooler 97. A cooling water pipe 98 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 98. An inverter unit 8 is provided in the path of the cooling water pipe 98. The cooling water passing through the cooling water pipe 98 cools the inverter unit 8. As shown in FIGS. 3 and 4, the inverter unit 8 is fixed to the rear side (−X side) of the motor accommodating portion 61 in the present embodiment. The inverter unit 8 supplies electric power to the motor 2 and controls the motor 2.

According to this embodiment, the first pipe 11 and the second pipe 12 are connected by a fourth flow path 94 as a refrigerant flow path. Therefore, for example, by sending the oil O to the inflow portion 94a of the fourth flow path 94 as in the present embodiment, the oil O can be supplied to both the first pipe 11 and the second pipe 12. That is, the number of oil passages provided in the housing 6 can be reduced as compared with the case where separate oil passages for supplying oil O are provided for each of the first pipe 11 and the second pipe 12. Therefore, it is possible to prevent the housing 6 from becoming large.

Further, the fourth flow path 94 is provided in the partition wall 61c located on the left side of the stator 30. Therefore, the fourth flow path 94 can be arranged at a position where it overlaps with the stator 30 in the axial direction. As a result, it is easy to arrange the fourth flow path 94 while avoiding interference with the fixing portion 32b of the stator 30. Further, for example, as compared with the case where the fourth flow path 94 is provided outside in the radial direction of the stator 30, it is possible to prevent the housing 6 from becoming larger in the radial direction. Further, since the fourth flow path 94 is provided in the partition wall 61c of the housing 6, the drive device is compared with the case where the flow path connecting the first pipe 11 and the second pipe 12 is provided on the outside of the housing 6 by a pipe or the like. 1 It is easy to miniaturize the whole. Therefore, according to the present embodiment, it is possible to prevent the drive device 1 from becoming large.

Further, according to the present embodiment, the fourth flow path 94 has a portion that passes radially inside the fixing portion 32b. Therefore, it is easier to arrange the fourth flow path 94 so as to avoid the fixed portion 32b, and it is possible to further suppress the housing 6 from becoming larger in the radial direction. Therefore, it is possible to further suppress the increase in size of the drive device 1.

Further, according to the present embodiment, the first pipe 11 and the second pipe 12 are arranged so as to sandwich the fixing portion 32b in the circumferential direction. Therefore, the first pipe 11 and the second pipe 12 can be arranged at positions that do not interfere with the fixing portion 32b, and the first pipe 11 and the second pipe 12 can be arranged so as to be close to the stator core main body 32a in the radial direction. Therefore, it is possible to easily supply the oil O from the first pipe 11 and the second pipe 12 to the stator 30, and it is possible to prevent the drive device 1 from becoming larger in the radial direction.

Further, according to the present embodiment, the first pipe 11 and the second pipe 12 extend linearly in the axial direction. Therefore, it is possible to prevent the drive device 1 from becoming larger in the radial direction as compared with the case where the first pipe 11 and the second pipe 12 are bent and extended in the radial direction. Further, since the shape of the first pipe 11 and the shape of the second pipe 12 can be made simple, it is easy to make the first pipe 11 and the second pipe 12. Further, the first pipe 11 and the second pipe 12 can be easily arranged so as to face the stator 30 over a wide range in the axial direction. Therefore, it is easy to supply the oil O from the first pipe 11 and the second pipe 12 to a wide range in the axial direction of the stator 30. Therefore, the stator 30 can be cooled more preferably.

Further, according to the present embodiment, the motor shaft J1 extends in the horizontal direction orthogonal 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 be flowed from the upper side to the lower side of the stator 30 by using gravity. As a result, the oil O can be easily supplied to the entire stator 30, and the entire stator 30 can be easily cooled by the oil O.

Specifically, in the present embodiment, the first pipe 11 is located on the upper side of the stator 30, and the first oil supply port 13 and the second oil supply port 14 of the first pipe 11 face downward. Therefore, the oil O can be discharged downward from the first pipe 11 toward the stator 30. As a result, the oil O from the first pipe 11 can flow from the upper side to the lower side of the stator 30 by using gravity, and the entire stator 30 can be easily cooled.

Further, in the present embodiment, the second pipe 12 is located on the front side of the stator 30, and the third oil supply port 15 of the second pipe 12 faces upward. Therefore, the oil O discharged upward from the third oil supply port 15 can be supplied to the upper portion of the stator 30. As a result, the oil O from the second pipe 12 can flow from the upper side to the lower side of the stator 30 by using gravity, and the entire stator 30 can be easily cooled. In particular, in the present embodiment, the third oil supply port 15 faces diagonally upward and rearward. Therefore, the oil O discharged from the third oil supply port 15 can easily reach the upper portion of the stator 30. As a result, the stator 30 can be more easily cooled by the oil O discharged from the second pipe 12.

Further, according to the present embodiment, the second oil supply port 14 of the first pipe 11 and the third oil supply port 15 of the second pipe 12 are supply ports for supplying oil O to the stator core 32. Therefore, the stator core 32 can be suitably cooled by the oil O supplied from the first pipe 11 and the second pipe 12.

Further, as shown in FIG. 3, in the present embodiment, the first pipe 11 is located behind the upper fixing portion 32b. Therefore, the oil O discharged from the second oil supply port 14 of the first pipe 11 tends to flow to the rear side of the upper fixed portion 32b. As a result, the oil O can be easily supplied to the rear portion of the stator core 32 by the first pipe 11. On the other hand, the second pipe 12 is located on the front side of the upper fixed portion 32b. Therefore, the oil O discharged upward from the third oil supply port 15 of the second pipe 12 is likely to be supplied to a portion on the front side of the upper fixed portion 32b. As a result, the oil O can be easily supplied to the front portion of the stator core 32 by the second pipe 12. Therefore, the first pipe 11 and the second pipe 12 make it easy to supply oil O to both sides of the stator core 32 in the front-rear direction, and it is easy to cool the entire stator core 32.

Further, according to the present embodiment, the first oil supply port 13 of the first pipe 11 is a supply port for supplying oil O to the coil ends 33a and 33b. Therefore, the coil ends 33a and 33b can be suitably cooled by the oil O supplied from the first pipe 11. In the present embodiment, since the first pipe 11 is located above the stator 30, the oil O from the first oil supply port 13 can be supplied from above the coil ends 33a and 33b. As a result, the oil O from the first oil supply port 13 can flow from the upper side to the lower side of the coil ends 33a and 33b by using gravity. Therefore, it is easy to supply the oil O to the entire coil ends 33a and 33b, and it is easy to cool the entire coil ends 33a and 33b.

Further, according to the present embodiment, a plurality of first oil supply ports 13 of the first pipe 11 are arranged above the coil ends 33a and 33b. Therefore, the amount of oil O supplied from the first pipe 11 to the coil ends 33a and 33b can be increased. As a result, the coil 31 which is a heating element can be suitably cooled, and the stator 30 can be cooled more preferably.

Further, according to the present embodiment, the plurality of first oil supply ports 13 located above the coil ends 33a and 33b are arranged in a zigzag manner along the circumferential direction. Therefore, the axial positions of the plurality of first oil supply ports 13 arranged along the circumferential direction are alternately arranged. As a result, it is easier to supply oil O to the entire coil ends 33a and 33b than when the axial positions of the plurality of first oil supply ports 13 located above the coil ends 33a and 33b are the same. ..

Further, according to the present embodiment, the first oil supply port 13 located on the upper side of each coil end 33a, 33b has a first oil supply port 13 facing diagonally forward on the lower side and a first oil supply port 13 facing diagonally backward on the lower side. The oil supply port 13 and the like are included. Therefore, it is easy to supply the oil O supplied from the plurality of first oil supply ports 13 to both the front side portion and the rear side portion of the coil ends 33a and 33b, and it is easy to supply the oil O to the entire coil ends 33a and 33b. .. As a result, the coil ends 33a and 33b can be cooled more preferably, and the stator 30 can be cooled more preferably.

Further, according to the present embodiment, the right end portion of the first pipe 11 is closed by the mounting member 16, and the right end portion of the second pipe 12 is closed by the mounting member 17. In the present embodiment, the right end of the first pipe 11 is the end opposite to the side on which the oil O flows into the first pipe 11. The right end of the second pipe 12 is the end opposite to the side on which the oil O flows into the second pipe 12. That is, of the axial end portions of each pipe, the end portion opposite to the side on which the oil O flows in is closed. Therefore, the pressure of the oil O flowing in each pipe is likely to be increased as compared with the case where the end portion of each pipe in the axial direction opposite to the side on which the oil O flows is opened. As a result, it is easy to vigorously inject oil O from the oil supply port of each pipe. Therefore, it is easy to suitably supply the oil O discharged from each oil supply port to the stator 30.

In particular, in the second pipe 12 of the present embodiment, the third oil supply port 15 faces upward. Therefore, the oil O can be vigorously injected upward from the third oil supply port 15. As a result, the oil O discharged from the third oil supply port 15 can easily reach the portion of the stator core 32 located on the upper side. Therefore, the oil O discharged from the second pipe 12 can be easily supplied over a wide range of the stator core 32, and the stator core 32 can be cooled more preferably.

The present invention is not limited to the above-described embodiment, and other configurations may be adopted within the scope of the technical idea of the present invention. In the above-described embodiment, the case where the refrigerant is oil O has been described, but the present invention is not limited to this. 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. When the refrigerant is water, the surface of the stator may be insulated.

The first pipe and the second pipe may be arranged at any position as long as they are located on the radial outer side of the stator and are arranged at intervals in the circumferential direction. For example, at least one of the first pipe and the second pipe may be located below the stator, or may be located behind the stator. Further, the first pipe and the second pipe may be arranged on the same side with respect to the stator. For example, both the first pipe and the second pipe may be located above the stator.

The shape of the first pipe and the shape of the second pipe are not particularly limited. The first pipe and the second pipe may have a square tubular shape. The first pipe and the second pipe may be bent and extended, or may be curved. At least one refrigerant supply port of the first pipe may be provided. At least one refrigerant supply port of the second pipe may be provided. The refrigerant supply port may be any supply port that supplies the refrigerant to the stator, and may not include the supply port that supplies the refrigerant to the stator core, or may not include the supply port that supplies the refrigerant to the coil end. In the first pipe and the second pipe, the ends on the side opposite to the side on which the refrigerant flows may be open.

Other pipes other than the first pipe and the second pipe may be provided. In this case, the other pipe may or may not have a refrigerant supply port for supplying the refrigerant to the stator as in the first pipe and the second pipe. Other pipes may have supply ports for supplying oil as a lubricant to bearings such as rotors.

The refrigerant flow path connecting the first pipe and the second pipe may have any shape as long as it is provided on the axial wall portion. Further, the refrigerant flow path may be a flow path for sending the refrigerant flowing from one pipe of the first pipe and the second pipe to the other pipe. The axial wall portion is not particularly limited as long as it is a wall portion located on one side in the axial direction of the stator. For example, in the above-described embodiment, the wall portion 61b located on the right side of the stator 30 may be an axial wall portion provided with a refrigerant flow path. The pump may be a mechanical pump. The pump may not be provided.

The drive device is not particularly limited as long as it is a device capable of moving a target object using a motor as a power source. The drive device does not have to include a transmission mechanism. The torque of the motor may be output directly from the shaft of the motor to the target. In this case, the drive device corresponds to the motor itself. The direction in which the motor shaft extends is not particularly limited. The motor shaft may extend in the vertical direction. In the present specification, "the motor shaft extends in the horizontal direction orthogonal to the vertical direction" includes not only the case where the motor shaft extends strictly in the horizontal direction but also the case where the motor shaft extends in the substantially horizontal direction. That is, in the present specification, "the motor shaft extends in the horizontal direction orthogonal to the vertical direction" may mean that the motor shaft is slightly tilted with respect to the horizontal direction.

The use of the drive device is not particularly limited. The drive device does not have to be mounted on 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 ... Motor, 3 ... Transmission device, 6 ... Housing, 11 ... 1st pipe, 12 ... 2nd pipe, 13 ... 1st oil supply port (refrigerant supply port), 14 ... 2nd oil supply port (Refrigerant supply port), 15 ... 3rd oil supply port (refrigerant supply port), 20 ... rotor, 30 ... stator, 31 ... coil, 32 ... stator core, 32a ... stator core body, 32b ... fixed part, 33 ... coil assembly, 33a, 33b ... Coil end, 55 ... Axle, 61c ... Bulk partition (axial wall part), 94 ... Fourth flow path (refrigerant flow path), 94a ... Inflow part, 94c ... First branch part, 94f ... Second Branch part, 96 ... oil pump (pump), J1 ... motor shaft, O ... oil (refrigerant)

Claims (12)

A rotor that can rotate around the motor shaft, and a motor that has a stator located radially outside the rotor.
The first pipe and the second pipe, which are located on the radial outer side of the stator and are arranged at intervals in the circumferential direction about the motor shaft,
A housing for accommodating the motor, the first pipe, and the second pipe inside.
A refrigerant flow path that connects the first pipe and the second pipe and allows refrigerant to flow inside,
With
The first pipe and the second pipe each have a refrigerant supply port for supplying the refrigerant to the stator.
The housing has an axial wall portion located on one side of the stator in the axial direction.
The refrigerant flow path is a drive device provided on the axial wall portion. The stator core of the stator
With the stator core body
A fixing portion that protrudes radially outward from the outer peripheral surface of the stator core body and is fixed to the housing.
Have,
The driving device according to claim 1, wherein the refrigerant flow path has a portion that passes radially inside the fixed portion. The driving device according to claim 2, wherein the first pipe and the second pipe are arranged so as to sandwich the fixed portion in a circumferential direction centered on the motor shaft. The driving device according to any one of claims 1 to 3, wherein the first pipe and the second pipe extend linearly in the axial direction of the motor shaft. The drive device according to any one of claims 1 to 4, wherein the motor shaft extends in a horizontal direction orthogonal to a vertical direction. The first pipe is located on the upper side of the stator in the vertical direction.
The drive device according to claim 5, wherein the refrigerant supply port of the first pipe faces downward in the vertical direction. The second pipe is located on one side of the stator in the horizontal direction.
The driving device according to claim 5 or 6, wherein the refrigerant supply port of the second pipe faces upward in the vertical direction. The drive device according to any one of claims 1 to 7, wherein the refrigerant supply port includes a supply port for supplying the refrigerant to the stator core of the stator. The stator has a coil assembly with a plurality of coils.
The coil assembly has a coil end that projects axially from the stator core of the stator.
The drive device according to any one of claims 1 to 8, wherein the refrigerant supply port includes a supply port for supplying the refrigerant to the coil end. The refrigerant flow path is
The inflow part into which the refrigerant flows and
A first branch that branches from the inflow and extends to the first pipe,
A second branch that branches from the inflow and extends to the second pipe,
The driving device according to any one of claims 1 to 9. Further equipped with a pump for sending the refrigerant,
The housing houses the refrigerant inside and
The drive device according to any one of claims 1 to 10, wherein the pump sends the refrigerant housed inside the housing to the refrigerant flow path, the first pipe, and the second pipe. It is a drive device mounted on a vehicle.
The drive device according to any one of claims 1 to 11, further comprising a transmission device connected to the motor and transmitting the torque of the motor to the axle of the vehicle.

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