JP2021164298A - Driving device - Google Patents

Abstract

To provide a driving device having a structure which can inhibit a fluid from leaking to the outside of a pipe member.SOLUTION: A driving device includes: a motor; a housing which houses the motor therein; and a pipe member 11 attached to the housing. The pipe member has: a pipe member body 11a having a passage 17 and an injection port which connects to the passage; and an attachment member 70 held by the pipe member body and attached to the housing. The pipe member body is made of a resin. A material of the attachment member is different from a material of the pipe member body. The attachment member has: a held part 71 which is held so as to be embedded in the pipe member body; and a flange part 72 protruding from the pipe member body to the outside of the pipe member body. The flange part has a fixed part 72a fixed to the housing. The held part has a first through hole 71a penetrating through the held part. A part of the pipe member body is located in the first through hole. The first through hole is located between the passage and the flange part when viewed in a direction in which the passage extends.SELECTED DRAWING: Figure 9

Description

The present invention relates to a drive device.

Drive devices are known that include tube members arranged inside the housing. For example, Patent Document 1 describes an in-wheel motor drive device including an oil pipe as a pipe member as such a drive device.

JP-A-2018-14867

In the above-mentioned pipe member, the main body of the pipe member may be made of resin. In this case, it is conceivable that the mounting member for mounting the pipe member main body in the housing is made of a material different from that of the pipe member main body such as metal, and a part of the mounting member is embedded and held in the pipe member main body. .. However, in this case, the fluid flowing in the main body of the pipe member may leak to the outside of the pipe member from between the portion of the mounting member protruding from the main body of the pipe member and the main body of the pipe member.

In view of the above circumstances, one of the objects of the present invention is to provide a drive device having a structure capable of suppressing leakage of a fluid to the outside of a pipe member.

One aspect of the drive device of the present invention includes a motor, a housing for accommodating the motor inside, and a tube member attached to the housing. The pipe member has a pipe member main body having a flow path and an injection port connected to the flow path, and a mounting member held by the pipe member main body and attached to the housing. The tube member main body is made of resin, and the material of the mounting member is different from the material of the tube member main body. The mounting member has a held portion embedded and held in the pipe member main body, and a flange portion protruding from the pipe member main body to the outside of the pipe member main body. The flange portion has a fixed portion fixed to the housing. The held portion has a first through hole that penetrates the held portion. A part of the pipe member main body is located inside the first through hole. The first through hole is located between the flow path and the flange portion when viewed in the direction in which the flow path extends.

According to one aspect of the present invention, in the drive device, it is possible to prevent the fluid from leaking to the outside of the pipe member.

FIG. 1 is a schematic configuration diagram schematically showing a driving device of the first embodiment. FIG. 2 is a cross-sectional view showing a part of the driving device of the first embodiment, and is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a perspective view showing a part of the housing of the first embodiment. FIG. 4 is a perspective view showing a part of the housing of the first embodiment and the first pipe member. FIG. 5 is a view of a part of the housing and the mounting member of the first embodiment as viewed from the rear side. FIG. 6 is a perspective view showing the stator, the first pipe member, and the second pipe member of the first embodiment. FIG. 7 is a perspective view showing a part of the first pipe member of the first embodiment. FIG. 8 is a cross-sectional view showing the first pipe member of the first embodiment. FIG. 9 is a cross-sectional view showing the first pipe member of the first embodiment, and is a cross-sectional view taken along the line IX-IX in FIG. FIG. 10 is a view of a part of the housing of the second embodiment and the first pipe member as viewed from the right side. FIG. 11 is a cross-sectional view showing the first pipe member of the third embodiment. FIG. 12 is a cross-sectional view showing the first pipe member of the fourth embodiment.

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

In the drawings, the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate. In the XYZ coordinate system, the Z-axis direction is the vertical direction. The + Z side is the upper side in the vertical direction, and the −Z side is the lower side in the vertical direction. In the following description, the upper side in the vertical direction is simply referred to as "upper side", and the lower side in the vertical direction is simply referred to as "lower side". The X-axis direction is a direction orthogonal to the Z-axis direction and is a front-rear direction of the vehicle on which the drive device is mounted. In each of 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 each of the following embodiments, the + Y side is the left side of the vehicle and the −Y side is the right side of the vehicle. The front-back direction and the left-right direction are horizontal directions orthogonal to the vertical direction.

The positional relationship in the front-rear direction is not limited to the positional relationship of each 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 appropriately shown in each figure extends in a direction intersecting the vertical direction. More specifically, the motor shaft J1 extends in the Y-axis direction orthogonal to the vertical direction, 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 "diametric 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 referred to as the "circumferential direction". In the present specification, the "parallel direction" includes a substantially parallel direction, and the "orthogonal direction" also includes a substantially orthogonal direction.

<First Embodiment>
The drive device 1 of the present embodiment shown in FIG. 1 is mounted on a vehicle powered by a motor, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and an electric vehicle (EV), and is used as the power source thereof. Will be done. As shown in FIG. 1, the drive device 1 includes a motor 2, a transmission device 3 including a speed reducer 4 and a differential device 5, a housing 6, an oil pump 96, a cooler 97, a refrigerant supply unit 10, and the like. To be equipped. Further, as shown in FIG. 2, the drive device 1 includes a breather 80. In this embodiment, the drive device 1 does not include the inverter unit. In other words, the drive device 1 has a structure separate from the inverter unit.

As shown in FIG. 1, 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 63. The motor accommodating portion 61 is a portion that accommodates the rotor 20 and the stator 30, which will be described later, inside. The motor accommodating portion 61 surrounds the stator core 32, which will be described later, from the outside in the radial direction. 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 63 axially partitions the inside of the motor accommodating portion 61 and the inside of the gear accommodating portion 62. The partition wall 63 is provided with a partition wall opening 63a. The partition wall opening 63a connects the inside of the motor accommodating portion 61 and the inside of the gear accommodating portion 62. The partition wall 63 is located on the left side of the stator 30.

The housing 6 houses the oil O as a refrigerant inside. In the present embodiment, the oil O is accommodated inside the motor accommodating portion 61 and inside the gear accommodating portion 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 via the partition wall opening 63a and returns to the oil sump P.

In the present 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 may be used. When is stopped, the oil does not have to be located inside a part. For example, in the present embodiment, the fact that the oil O is stored inside the motor housing unit 61 means that the oil O is located inside the motor housing unit 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 63a. 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 an automatic transmission fluid (ATF) having a relatively low viscosity in order to perform the functions of the lubricating oil and the cooling oil.

As shown in FIG. 2, the housing 6 has a support portion 64 that protrudes inward in the radial direction from the inner peripheral surface of the motor accommodating portion 61. The support portion 64 comes into contact with the outer peripheral surface of the stator core main body 32a, which will be described later. A plurality of support portions 64 are provided at intervals along the circumferential direction. Although not shown, the support portion 64 extends in the axial direction. The support portion 64 has a through groove 64a that penetrates the support portion 64 in the circumferential direction. The through groove 64a is recessed from the radial inner side surface of the support portion 64 to the radial outer side. A plurality of through grooves 64a are provided for each support portion 64, for example. The plurality of through grooves 64a provided in one support portion 64 are arranged, for example, at intervals in the axial direction. Each support portion 64 is provided with, for example, two through grooves 64a.

A breather 80 is provided in the housing 6. In this embodiment, the breather 80 has a vent 66 and a breather pipe 81. The ventilation hole 66 connects the inside and the outside of the housing 6. In the present embodiment, the ventilation hole 66 connects the inside and the outside of the motor accommodating portion 61. The ventilation hole 66 is provided in the upper side wall portion 61c located on the upper side of the wall portion of the motor accommodating portion 61. The upper side wall portion 61c is an upper wall portion of the housing 6. In the present embodiment, the ventilation hole 66 penetrates the upper side wall portion 61c in the vertical direction. The ventilation hole 66 is, for example, a circular hole.

The ventilation hole 66 has an inner opening 66a that opens inside the housing 6. In the present embodiment, the inner opening 66a opens inside the housing recess 61d provided on the inner peripheral surface of the motor accommodating portion 61. The housing recess 61d is recessed radially outward from the inner peripheral surface of the motor accommodating portion 61. More specifically, the housing recess 61d is recessed upward from the lower surface of the upper side wall portion 61c. The housing recess 61d is located, for example, on the rear side (−X side) of the motor shaft J1. In this embodiment, the inner opening 66a is the lower end of the vent 66. The upper end of the vent 66 opens to the outside of the drive device 1.

The breather pipe 81 has a cylindrical shape with both ends open. One end of the breather pipe 81 is fitted into the upper end of the vent 66. One end of the breather pipe 81 is fixed in the ventilation hole 66. One end of the breather pipe 81 opens into the ventilation hole 66. The other end of the breather pipe 81 is located outside the housing 6. The breather pipe 81 connects the inside of the ventilation hole 66 and the outside of the housing 6. Air can move between the inside of the housing 6 and the outside of the housing 6 via the breather 80.

Although not shown, the breather 80 has a valve body provided in the breather pipe 81. The valve body is spherical and comes into contact with a valve seat (not shown) provided on the inner peripheral surface of the breather pipe 81 from above. The valve seat is an annular tapered surface facing upward, and the inner diameter increases toward the upper side. The valve body is movably mounted on the valve seat upward. For example, when the internal pressure of the housing 6 becomes higher than the external pressure and the pressure difference between the internal pressure and the external pressure becomes a predetermined value or more, the valve body moves upward with respect to the valve seat. As a result, the inside and the outside of the housing 6 communicate with each other through the breather 80. Therefore, it is possible to prevent the internal pressure of the housing 6 from becoming high. The valve body may move upward with respect to the valve seat even when the drive device 1 vibrates, for example.

Although not shown, a hose (not shown) may be provided at the other end of the breather pipe 81, that is, at the end located outside the housing 6. The total length of the hose is, for example, longer than the total length of the breather pipe 81. By providing a hose longer than the breather pipe 81 at the other end of the breather pipe 81, even if the oil O is discharged from the other end of the breather pipe 81 to the inside of the hose, the oil O stays inside the hose. It can be made difficult to be discharged to the outside. As a result, it is possible to prevent the oil O from leaking to the outside of the drive device 1. Further, a filter may be provided at the tip of a hose (not shown).

The housing 6 has a barrier portion 65 facing a portion of the inside of the housing 6 where the inner opening 66a opens. In the present embodiment, the portion of the inside of the housing 6 where the inner opening 66a opens includes the inside of the housing recess 61d. The barrier portion 65 constitutes, for example, a part of the wall surface located on the front side (+ X side) of the wall surface surrounding the housing recess 61d. The barrier portion 65 covers a part of the inside of the housing recess 61d from the front side.

In the present specification, "the barrier portion faces the portion of the inside of the housing where the inner opening opens" means that at least a part of the wall surface of the barrier portion has the inner opening of the inside of the housing opened. It suffices to form a part of the wall surface surrounding the part to be used.

The barrier portion 65 is located, for example, on the rear side (−X side) of the motor shaft J1. As shown in FIGS. 3 to 5, the barrier portion 65 extends in the axial direction. The left end (+ Y side) end of the barrier portion 65 is connected to, for example, the partition wall 63. The right end (-Y side) end of the barrier portion 65 is arranged at intervals on the left side of the wall portion 61b located on the right side of the motor accommodating portion 61. In the present embodiment, the axial direction corresponds to the "predetermined direction", and the left side (+ Y side) corresponds to "one side of the predetermined direction".

As shown in FIG. 3, the barrier portion 65 has a protruding wall portion 65a and an opposing wall portion 65b. The protruding wall portion 65a projects downward from the inner side surface of the upper side wall portion 61c. The protruding wall portion 65a extends in the axial direction. The left end (+ Y side) end of the protruding wall portion 65a is connected to, for example, the partition wall 63. The right (−Y side) end of the protruding wall portion 65a is arranged, for example, on the left side of the wall portion 61b at intervals.

The protruding wall portion 65a has a female screw hole 65c and a rotation stop recess 65d. The female screw hole 65c and the rotation stop recess 65d are recessed from the right end surface (-Y side) of the protruding wall portion 65a to the left side (+ Y side). The rotation stop recess 65d is located, for example, on the upper side and the rear side (−X side) of the female screw hole 65c.

The facing wall portion 65b projects from the lower end portion of the protruding wall portion 65a to the rear side (−X side). The rear end of the facing wall portion 65b is located posterior to the inner opening 66a. The rear end of the facing wall portion 65b faces the inner side surface of the housing recess 61d in the front-rear direction via a gap with the portion located on the rear side. The facing wall portion 65b is located below the inner opening 66a. The facing wall portion 65b faces the inner opening 66a in the vertical direction through a gap. The facing wall portion 65b extends in the axial direction. The left end (+ Y side) end of the facing wall portion 65b is connected to, for example, the partition wall 63. The right (−Y side) end of the facing wall portion 65b is arranged, for example, on the left side of the wall portion 61b at intervals.

As shown in FIG. 5, the facing wall portion 65b is located below the upper side wall portion 61c. The facing wall portion 65b faces the upper side wall portion 61c in the vertical direction via the extending gap portion G extending in the axial direction. The stretched gap portion G is a part of the gap between the inner surface of the housing 6 and the barrier portion 65. That is, the gap between the inner surface of the housing 6 and the barrier portion 65 includes the extending gap portion G extending in the axial direction. The gap between the inner surface of the housing 6 and the barrier portion 65 also includes, for example, an axial gap between the barrier portion 65 and the wall portion 61b.

The vertical dimension of the facing wall portion 65b increases toward the left side (+ Y side). The upper surface of the facing wall portion 65b is an inclined surface 65f located on the upper side toward the left side. The inclined surface 65f faces the lower surface of the upper side wall portion 61c in the vertical direction via the extension gap portion G. The lower surface of the upper side wall portion 61c is an inclined surface 61e located on the lower side toward the left side. The vertical dimension of the stretched gap G located between the inclined surface 65f and the inclined surface 61e becomes smaller toward the left side. In other words, the width of the stretched gap G becomes narrower toward the left side.

As shown in FIG. 2, the lower surface of the facing wall portion 65b is, for example, a curved surface along the circumferential direction. The lower surface of the facing wall portion 65b comes into contact with the outer peripheral surface of the stator core main body 32a, which will be described later. As shown in FIG. 3, the facing wall portion 65b has a through groove 65e penetrating the facing wall portion 65b in the circumferential direction. The through groove 65e is recessed from the radial inner side surface of the facing wall portion 65b to the radial outer side. In other words, the through groove 65e is recessed upward from the lower surface of the facing wall portion 65b. A plurality of through grooves 65e are provided, for example, at intervals in the axial direction. Two through grooves 65e are provided, for example.

As shown in FIG. 1, the motor 2 in this embodiment 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 a motor shaft J1 extending in the horizontal direction. The rotor 20 includes a shaft 21 and a rotor body 24. Although not shown, the rotor body 24 has a rotor core and a rotor magnet fixed to the rotor core. The torque of the rotor 20 is transmitted to the transmission device 3.

The shaft 21 extends along the axial direction about the motor shaft J1. The shaft 21 rotates about the motor shaft J1. The shaft 21 is a hollow shaft provided with a hollow portion 22 inside. The shaft 21 is provided with a communication hole 23. The communication hole 23 extends in the radial direction and connects the hollow portion 22 and the outside of the shaft 21.

The shaft 21 extends across the motor accommodating portion 61 and the gear accommodating 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 located radially outside the rotor 20. The stator core 32 surrounds the rotor 20. The stator core 32 is fixed to the inner peripheral surface of the motor accommodating portion 61.

As shown in FIGS. 2 and 6, the stator core 32 has a stator core main body 32a and a fixing portion 32b. The outer peripheral surface of the stator core main body 32a has a cylindrical shape surrounding the rotor 20. The outer peripheral surface of the stator core main body 32a has, for example, a cylindrical shape centered on the motor shaft J1. Although not shown, the stator core body 32a has a cylindrical core back extending in the axial direction and a plurality of teeth extending radially inward from the core back. The outer peripheral surface of the core back is the outer peripheral surface of the stator core body. The plurality of teeth are arranged at equal intervals 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, for example, 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 present embodiment, the fixing portion 32b protruding upward from the stator core main body 32a is an upper fixing portion 32f located above the motor shaft J1. In the present embodiment, the fixing portion 32b protruding forward from the stator core main body 32a is the front fixing portion 32g. The front fixing portion 32g is located, for example, below the motor shaft J1.

As shown in FIG. 6, 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. 2, a bolt 35 extending in the axial direction is passed through the through hole 32c. The bolt 35 is passed through the through hole 32c from the right side (−Y side) and tightened into the female screw hole provided in the partition wall 63. By tightening the bolt 35 into the female screw hole, the fixing portion 32b is fixed to the partition wall 63. In this way, the stator 30 is fixed to the housing 6 by bolts 35.

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

The coil assembly 33 has coil ends 33a, 33b that project axially from the stator core 32. The coil end 33a is a portion protruding to the left from the stator core 32. The coil end 33b is a portion protruding to the right 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 left side of the stator core 32. The coil end 33b includes a portion of each coil 31 included in the coil assembly 33 that projects to the right of the stator core 32. As shown in FIG. 6, 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 63.

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 both 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 pumping 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 sump P by the rotation of the ring gear 51 of the differential device 5 and the oil O is received in the first reservoir 93. The first reservoir 93 opens upward. The first reservoir 93 receives the oil O scooped up by the ring gear 51. Further, when the liquid level 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 through which the oil O passes through the inside of the rotor main body 24 from the communication hole 23 of the shaft 21 and scatters to the stator 30.

In the in-shaft path 91c, centrifugal force is applied to the oil O inside the rotor 20 as the rotor 20 rotates. As a result, the oil O continuously scatters radially outward from the rotor 20. Further, as the oil O scatters, the path inside the rotor 20 becomes negative pressure, the oil O accumulated in the first reservoir 93 is sucked into the rotor 20, and the path inside the rotor 20 is filled with the oil O.

The oil O that has reached the stator 30 takes heat from the stator 30. The oil O that has cooled the stator 30 is dropped on the lower side and accumulated in the lower region in the motor accommodating portion 61. The oil O accumulated in the lower region in the motor accommodating portion 61 moves to the gear accommodating portion 62 via the partition wall opening 63a provided in the partition wall 63. As described above, the first oil passage 91 supplies the oil O to the rotor 20 and the stator 30.

In the second oil passage 92, the oil O is pulled up from the oil sump P and supplied to the stator 30. The second oil passage 92 is provided with an oil pump 96, a cooler 97, and a refrigerant supply unit 10. 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.

The first flow path 92a, the second flow path 92b, the third flow path 92c, and the fourth flow path 94 are provided on the wall portion of the housing 6. The first flow path 92a connects the oil reservoir 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 63. The fourth flow path 94 connects the third flow path 92c and the refrigerant supply unit 10.

The refrigerant supply unit 10 supplies the oil O as a refrigerant to the motor 2. As shown in FIG. 6, the refrigerant supply unit 10 includes a first pipe member 11 and a second pipe member 12. In the present embodiment, the first pipe member 11 and the second pipe member 12 are pipes extending in the axial direction. The first pipe member 11 and the second pipe member 12 have, for example, a cylindrical shape extending linearly in the axial direction. The first pipe member 11 and the second pipe member 12 are, for example, parallel to each other. As shown in FIG. 2, the first pipe member 11 and the second pipe member 12 are housed inside the housing 6. The first pipe member 11 and the second pipe member 12 are located on the outer side in the radial direction of the stator 30. The first pipe member 11 and the second pipe member 12 are arranged so as to be spaced apart from each other in the circumferential direction. The radial position of the first pipe member 11 and the radial position of the second pipe member 12 are, for example, the same.

In addition, in the present specification, "a certain parameter is the same as each other" includes not only a case where a certain parameter is exactly the same as each other but also a case where a certain parameter is substantially the same as each other. "The parameters are substantially the same as each other" includes, for example, that the parameters are slightly deviated from each other within the tolerance.

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

As shown in FIG. 6, the first pipe member 11 has a pipe member main body 11a and a mounting member 70. In the present embodiment, the pipe member main body 11a has a cylindrical shape extending in the axial direction. The tube member main body 11a has, for example, a cylindrical shape that opens to the left side (+ Y side) with the central axis J4 extending in the axial direction as the center. The central shaft J4 is the central shaft of the pipe member main body 11a, and is a virtual shaft parallel to the motor shaft J1. The tube member main body 11a is made of resin. The tube member main body 11a is made, for example, by insert molding using the mounting member 70 as an insert member.

The pipe member main body 11a is located above the motor shaft J1. In the present embodiment, the pipe member main body 11a is located above the stator 30. More specifically, in the present embodiment, the pipe member main body 11a is located above the upper ends of the coil ends 33a and 33b. The radial position of the pipe member main body 11a is, for example, the same as the radial position of the fixing portion 32b. The pipe member main body 11a is located, for example, on the rear side (−X side) of the upper fixing portion 32f.

As shown in FIG. 2, in the present embodiment, the pipe member main body 11a is located on the front side (+ X side) of the barrier portion 65. The pipe member main body 11a is located, for example, between the barrier portion 65 and the upper fixing portion 32f in the circumferential direction. The pipe member main body 11a is located, for example, between the barrier portion 65 and the upper fixing portion 32f in the front-rear direction. The upper end of the tube member body 11a is located above the inner opening 66a. The lower end of the tube member body 11a is located below the inner opening 66a. When viewed in the front-rear direction, the pipe member main body 11a overlaps with at least a part of the ventilation holes 66.

In addition, in this specification, "a certain object is located on one side of another object in a certain direction" means that a certain object and another object are defined in a state where the driving device is arranged on a horizontal plane. This includes the fact that one object and another object overlap each other when viewed from one side of the direction, and that one object is located in front of the other object. For example, when the pipe member main body 11a is located above the stator 30 as in the present embodiment, when the pipe member main body 11a and the stator 30 are viewed from above with the drive device 1 arranged in a horizontal plane. The pipe member main body 11a and the stator 30 overlap each other, and the pipe member main body 11a is located on the front side of the stator 30. In the present specification, the "state in which the drive device is arranged on a horizontal plane" includes that the vehicle equipped with the drive device is arranged on a horizontal road surface.

As shown in FIGS. 7 and 8, the pipe member main body 11a has a large diameter portion 11b, a first small diameter portion 11c, and a second small diameter portion 11d. The first small diameter portion 11c and the second small diameter portion 11d are connected in the axial direction via the large diameter portion 11b. The first small diameter portion 11c is a portion of the pipe member main body 11a located on the left side (+ Y side) of the large diameter portion 11b. The second small diameter portion 11d is a portion of the pipe member main body 11a located on the right side (−Y side) of the large diameter portion 11b. The outer diameter of the first small diameter portion 11c and the outer diameter of the second small diameter portion 11d are, for example, the same as each other. The axial dimension of the first small diameter portion 11c is larger than, for example, the axial dimension of the second small diameter portion 11d.

The outer diameter of the large diameter portion 11b is larger than the outer diameter of the first small diameter portion 11c and the outer diameter of the second small diameter portion 11d. The large diameter portion 11b projects outward from the first small diameter portion 11c and the second small diameter portion 11d in the radial direction centered on the central axis J4. The large diameter portion 11b, the first small diameter portion 11c, and the second small diameter portion 11d are connected in the axial direction via, for example, a step. The axial dimension of the large diameter portion 11b is smaller than, for example, the axial dimension of the first small diameter portion 11c and the axial dimension of the second small diameter portion 11d. The large diameter portion 11b is provided, for example, on a portion closer to the right side (-Y side) of the pipe member main body 11a.

The left end (+ Y side) end of the tube member main body 11a is fitted into the hole 63b shown in FIG. The hole 63b is provided in the partition wall 63. The hole 63b is connected to a fourth flow path 94 provided in the partition wall 63. As a result, the inside of the pipe member main body 11a is connected to the fourth flow path 94. As shown in FIG. 6, the pipe member main body 11a has a flow path 17 through which the oil O flows. The inner surface of the flow path 17 is the inner surface of the tubular tube member main body 11a. The flow path 17 extends in the axial direction and opens to the left side (+ Y side). The opening on the left side of the flow path 17 connects to the fourth flow path 94. Oil O flows into the flow path 17 from the fourth flow path 94.

As shown in FIG. 8, the oil O flows from the left side (+ Y side) to the right side (−Y side) in the flow path 17 of the present embodiment. That is, in the flow direction of the oil O as a fluid in the flow path 17, the left side is the upstream side and the right side is the downstream side. The cross-sectional shape of the flow path 17 is, for example, a circular shape. In the present embodiment, the flow path cross section of the flow path 17 is a cross section of the flow path 17 orthogonal to the axial direction. The right end of the flow path 17 is closed.

The flow path 17 has a first flow path portion 17a and a second flow path portion 17b. In the present embodiment, the first flow path portion 17a is provided in the first small diameter portion 11c. The left end of the first flow path 17a is the left end of the flow path 17. The first flow path portion 17a extends in the axial direction. The inner diameter of the first flow path portion 17a decreases from the left side (+ Y side) to the right side (−Y side). As a result, the flow path cross-sectional area of the first flow path portion 17a becomes smaller toward the downstream side in the flow direction of the oil O in the flow path 17. That is, in the present embodiment, at least a part of the flow path 17 has a flow path cross-sectional area that becomes smaller toward the downstream side in the flow direction of the oil O in the flow path 17. In the present embodiment, the flow path cross-sectional area of the first flow path portion 17a is the area inside the first flow path portion 17a in a cross section orthogonal to the axial direction. The inner peripheral surface of the first flow path portion 17a is, for example, a tapered surface whose inner diameter increases toward the upstream side (left side, + Y side).

The second flow path portion 17b is connected to the right side (-Y side) of the first flow path portion 17a, that is, the downstream side. In the present embodiment, the second flow path portion 17b is provided so as to straddle the large diameter portion 11b and the second small diameter portion 11d. The right end of the second flow path 17b is the right end of the flow path 17. The second flow path portion 17b extends in the axial direction. In the present embodiment, the inner diameter of the second flow path portion 17b is the same over the entire axial direction. As a result, the flow path cross-sectional area of the second flow path portion 17b of the present embodiment is constant. In the present embodiment, the flow path cross-sectional area of the second flow path portion 17b is the area inside the second flow path portion 17b in a cross section orthogonal to the axial direction.

In the present specification, "the flow path cross-sectional area is constant" includes a case where the flow path cross-sectional area is strictly constant and a case where the flow path cross-sectional area is substantially constant. The phrase "the cross-sectional area of the flow path is substantially constant" includes, for example, the case where the cross-sectional area of the flow path varies within the tolerance range when the flow path is formed.

As shown in FIG. 6, the pipe member main body 11a has a first injection port 13, a second injection port 14, and a third injection port 16. The first injection port 13, the second injection port 14, and the third injection port 16 are injection ports connected to the flow path 17. Further, the first injection port 13, the second injection port 14, and the third injection port 16 are injection ports that open toward the motor 2. The oil O that has flowed into the flow path 17 is injected from the first injection port 13, the second injection port 14, and the third injection port 16. That is, in the present embodiment, the first pipe member 11 has a first injection port 13, a second injection port 14, and a third injection port 16 as injection ports for injecting oil O as a fluid.

The first injection port 13, the second injection port 14, and the third injection port 16 are provided on the outer peripheral surface of the pipe member main body 11a. In the present embodiment, the first injection port 13, the second injection port 14, and the third injection port 16 are the pipe members among the openings of the holes that penetrate the wall portion of the pipe member main body 11a from the inner peripheral surface to the outer peripheral surface. It is an opening that opens on the outer peripheral surface of the main body 11a. The first injection port 13, the second injection port 14, and the third injection port 16 have, for example, a circular shape. The first injection port 13, the second injection port 14, and the third injection port 16 face downward, for example.

In the present embodiment, a plurality of first injection ports 13 are provided in the first small diameter portion 11c and the second small diameter portion 11d. For example, four first injection ports 13 are provided in each of the first small diameter portion 11c and the second small diameter portion 11d. The four first injection ports 13 provided in the first small diameter portion 11c are arranged in a zigzag manner along the circumferential direction. The four first injection ports 13 provided in the first small diameter portion 11c are, for example, one first injection port 13 that opens directly below, two first injection ports 13 that open diagonally forward on the lower side, and a lower portion. Includes one first injection port 13 that opens obliquely rearward on the side. The four first injection ports 13 provided in the second small diameter portion 11d are arranged in the same manner as the four first injection ports 13 provided in the first small diameter portion 11c except for the axial positions.

The four first injection ports 13 provided in the first small diameter portion 11c are located above the coil end 33a. The four first injection ports 13 provided in the second small diameter portion 11d are located above the coil end 33b. Therefore, the oil O injected from the first injection port 13 is supplied to the coil ends 33a and 33b from above. That is, the first injection port 13 is an injection port that injects oil O as a refrigerant toward the coil ends 33a and 33b. As described above, in the present embodiment, the first pipe member 11 injects oil O as a refrigerant from the plurality of first injection ports 13 toward the coil ends 33a and 33b.

In the present embodiment, the second injection port 14 is provided in the first small diameter portion 11c. The second injection port 14 is located on the right side (−Y side) of the plurality of first injection ports 13 provided in the first small diameter portion 11c. A plurality of second injection ports 14 are provided, for example, at intervals in the axial direction. For example, two second injection ports 14 are provided. As shown in FIG. 2, the second injection port 14 opens, for example, diagonally forward on the lower side. As shown in FIG. 6, the second injection port 14 is located above the stator core 32. Therefore, the oil O injected from the second injection port 14 is supplied to the stator core 32 from above. That is, in the present embodiment, the second injection port 14 is an injection port that injects oil O as a refrigerant toward the stator core 32.

In the present embodiment, one third injection port 16 is provided in each of the first small diameter portion 11c and the second small diameter portion 11d. The third injection port 16 provided in the first small diameter portion 11c is located, for example, on the left side (+ Y side) of the plurality of first injection ports 13 provided in the first small diameter portion 11c. The third injection port 16 provided in the first small diameter portion 11c is provided, for example, at the left end portion of the first small diameter portion 11c. The oil O injected from the third injection port 16 provided in the first small diameter portion 11c is supplied to the bearing 27.

The third injection port 16 provided in the second small diameter portion 11d is located, for example, on the right side (−Y side) of the plurality of first injection ports 13 provided in the second small diameter portion 11d. The third injection port 16 provided in the second small diameter portion 11d is provided, for example, at the right end of the second small diameter portion 11d. The oil O injected from the third injection port 16 provided in the second small diameter portion 11d is supplied to the bearing 26.

In the present specification, "the injection port faces downward in the vertical direction" means that the direction of the injection port may include a downward component, and the injection port may face directly downward. May be tilted with respect to the bottom. As described above, in the present embodiment, the first injection port 13 faces the first injection port 13 that faces directly below, the first injection port 13 that faces diagonally forward with respect to the bottom, and the first injection port 13 that faces directly below. Includes a first injection port 13 that faces a direction inclined obliquely rearward. Further, in the present embodiment, the second injection port 14 faces a direction obliquely inclined forward with respect to the direct bottom. In the present embodiment, "the second injection port 14 faces downward" means that the second injection port 14 may face directly below, for example, or faces at an angle obliquely backward with respect to the direct bottom. You may be.

The mounting member 70 is held by the pipe member main body 11a. More specifically, the mounting member 70 is partially embedded in the resin tube member body 11a and held in the tube member body 11a. The material of the mounting member 70 is different from the material of the pipe member main body 11a. In this embodiment, the mounting member 70 is made of metal. Therefore, the strength of the mounting member 70 can be relatively increased. As a result, the pipe member main body 11a can be stably and firmly fixed to the housing 6 via the mounting member 70. The mounting member 70 is made by, for example, pressing a plate-shaped metal member. The plate thickness of the mounting member 70 is, for example, uniform over the entire surface. The thickness of the mounting member 70 may be made uniform by, for example, pressing. As shown in FIG. 9, the mounting member 70 has a held portion 71 and a flange portion 72. That is, the first pipe member 11 has a held portion 71 and a flange portion 72.

In the present specification, "a certain material is different from another material" means that the component contained in a certain material may be different from the component contained in another material, or the component contained in a certain material. The proportion of the material may be different from the proportion of the components contained in the other material, or the type of one material may be different from the type of another material.

The held portion 71 is embedded and held in the pipe member main body 11a. In the present embodiment, the held portion 71 is embedded and held in the large diameter portion 11b. The held portion 71 extends, for example, in a direction obliquely inclined in the vertical direction with respect to the front-rear direction. The held portion 71 is located, for example, on the lower side toward the rear side (−X side). The held portion 71 has, for example, a plate shape in which the plate surface faces the axial direction.

The held portion 71 has a first through hole 71a, a second through hole 71b, and a third through hole 71c. The first through hole 71a, the second through hole 71b, and the third through hole 71c penetrate the held portion 71 in the axial direction. The second through hole 71b is, for example, a circular hole centered on the central axis J4 of the pipe member main body 11a. At least a part of the inner peripheral surface of the second through hole 71b is exposed inside the flow path 17. As a result, a part of the mounting member 70 is exposed inside the flow path 17. In the present embodiment, the entire inner peripheral surface of the second through hole 71b is exposed inside the flow path 17.

The inner peripheral surface of the second through hole 71b forms, for example, a part of the inner surface of the flow path 17. More specifically, as shown in FIG. 8, the inner peripheral surface of the second through hole 71b constitutes the inner peripheral surface of the left end (+ Y side) of the second flow path portion 17b. As a result, the portion of the mounting member 70 that is exposed inside the flow path 17 is exposed inside the end of the second flow path portion 17b on the upstream side in the flow direction of the oil O in the flow path 17.

As shown in FIG. 9, the first through hole 71a and the third through hole 71c are located outside the second through hole 71b in the radial direction centered on the central axis J4. The first through hole 71a and the third through hole 71c are arranged so as to sandwich the second through hole 71b. The first through hole 71a and the third through hole 71c sandwich the second through hole 71b in a direction obliquely inclined in the vertical direction with respect to the front-rear direction. In the radial direction centered on the central axis J4, the radial position of the first through hole 71a and the radial position of the third through hole 71c are, for example, the same as each other.

The first through hole 71a and the third through hole 71c are, for example, circular holes. The inner diameter of the first through hole 71a and the inner diameter of the third through hole 71c are smaller than, for example, the inner diameter of the second through hole 71b. The inner diameter of the first through hole 71a and the inner diameter of the third through hole 71c are, for example, the same as each other.

The first through hole 71a is located between the flow path 17 and the flange portion 72 when viewed in the axial direction in which the flow path 17 extends. The first through hole 71a is located, for example, on the rear side (−X side) of the second through hole 71b. A part of the pipe member main body 11a is located inside the first through hole 71a. That is, the resin is located inside the first through hole 71a. The inside of the first through hole 71a is filled with, for example, a part of the pipe member main body 11a. A part of the pipe member main body 11a located inside the first through hole 71a is, for example, a disk shape. By arranging a part of the pipe member main body 11a inside the first through hole 71a, the held portion 71 can be firmly held against the pipe member main body 11a. Therefore, the mounting member 70 can be firmly held against the pipe member main body 11a.

The third through hole 71c is located, for example, on the front side (+ X side) of the second through hole 71b. The third through hole 71c is located above the first through hole 71a, for example. A part of the pipe member main body 11a is located inside the third through hole 71c. That is, the resin is located inside the third through hole 71c. The inside of the third through hole 71c is filled with, for example, a part of the pipe member main body 11a. A part of the pipe member main body 11a located inside the third through hole 71c is, for example, a disk shape. By arranging a part of the pipe member main body 11a inside the third through hole 71c, the held portion 71 can be held more firmly with respect to the pipe member main body 11a. Therefore, the mounting member 70 can be held more firmly against the pipe member main body 11a.

The held portion 71 has a recess 71d provided in a portion of the held portion 71 that is closer to the flange portion 72 than the flow path 17. That is, the recess 71d is provided in the portion of the held portion 71 that is closer to the flange portion 72 than the second through hole 71b. The recess 71d is located on the rear side (−X side) of the second through hole 71b. In the present embodiment, the recess 71d is recessed in a direction orthogonal to the axial direction in which the first through hole 71a as the first through hole penetrates the held portion 71. The recess 71d is recessed in a direction that is obliquely inclined in the front-rear direction with respect to the vertical direction, for example. In the present embodiment, the recess 71d is recessed toward the first through hole 71a. The recess 71d penetrates the held portion 71 in the axial direction, for example. The recess 71d is formed by punching a part of a plate-shaped metal member by, for example, press working when the mounting member 70 is made. As a result, it is not necessary to perform a separate process other than the press process to form the recess 71d, and the mounting member 70 can be easily manufactured.

A pair of recesses 71d are provided with the first through hole 71a interposed therebetween. The pair of recesses 71d sandwich the first through hole 71a in a direction that is obliquely inclined in the front-rear direction with respect to the vertical direction, for example. The pair of recesses 71d are recessed toward the first through hole 71a on both sides of the first through hole 71a, so that the held portion 71 is provided with a narrow portion 71e sandwiched between the pair of recesses 71d. The dimensions of the held portion 71 in the direction in which the held portion 71 extends and in the direction orthogonal to the axial direction become smaller in the narrow portion 71e. The narrow portion 71e is provided with a first through hole 71a.

The flange portion 72 is a portion that protrudes from the pipe member main body 11a to the outside of the pipe member main body 11a. In the present embodiment, the flange portion 72 projects from the pipe member main body 11a in a direction orthogonal to the axial direction of the motor shaft J1. The flange portion 72 projects diagonally downward on the rear side (−X side) from the pipe member main body 11a, for example. In the present embodiment, the entire portion of the mounting member 70 excluding the flange portion 72 is embedded inside the pipe member main body 11a. In the present embodiment, the portion of the mounting member 70 excluding the flange portion 72 is the held portion 71. The flange portion 72 has a fixed portion 72a, a shielding portion 72b, and a rotation stop portion 72e.

The fixed portion 72a extends diagonally downward from the held portion 71 on the rear side (−X side) and protrudes from the pipe member main body 11a. The fixed portion 72a has, for example, a plate shape in which the plate surface faces the axial direction. The fixed portion 72a has a through hole 72f that penetrates the fixed portion 72a in the axial direction. As shown in FIG. 4, the through hole 72f overlaps with the female screw hole 65c when viewed in the axial direction.

A bolt 73 is passed through the through hole 72f from the right side (−Y side). The bolt 73 passed through the through hole 72f is tightened into the female screw hole 65c provided in the housing 6. As a result, the fixed portion 72a is fixed to the housing 6 by the bolt 73. In the present embodiment, the fixed portion 72a is fixed to the axial end portion of the barrier portion 65 by the bolt 73. More specifically, the fixed portion 72a is fixed to the right end surface of the protruding wall portion 65a by the bolt 73. The left side (+ Y side) surface of the fixed portion 72a contacts the right end surface of the protruding wall portion 65a. By fixing the fixed portion 72a to the housing 6, the mounting member 70 is attached to the housing 6. As a result, the first pipe member 11 is attached to the housing 6.

The shielding portion 72b is connected to the rear side (−X side) of the fixed portion 72a. The shielding portion 72b is arranged in a portion of the inside of the housing 6 connected to the ventilation hole 66. In the present specification, the "part of the inside of the housing connected to the ventilation hole" includes a part where air located in the portion can flow to the ventilation hole when the shielding portion is not arranged. That is, for example, when the shielding portion 72b is not provided, the air located at the portion where the shielding portion 72b is arranged can flow to the ventilation hole 66. The portion of the inside of the housing 6 connected to the ventilation hole 66 includes the inside of the housing recess 61d. The portion of the inside of the housing 6 connected to the ventilation hole 66 includes a portion of the inside of the housing 6 where the inner opening 66a opens. The portion of the inside of the housing 6 connected to the ventilation hole 66 includes the portion of the inside of the housing 6 between the stator 30 and the ventilation hole 66.

The shielding portion 72b has a first wall portion 72c and a second wall portion 72d. The first wall portion 72c extends from the fixed portion 72a. In the present embodiment, the first wall portion 72c extends from the fixed portion 72a in a direction orthogonal to the axial direction. The first wall portion 72c extends diagonally downward on the rear side (−X side) from, for example, the fixed portion 72a. The first wall portion 72c has, for example, a plate shape in which the plate surface faces the axial direction. In the present embodiment, the held portion 71, the fixed portion 72a, and the first wall portion 72c are connected in this order from the front side (+ X side) to the rear side, and are inclined in the vertical direction with respect to the front-rear direction. It constitutes an extending plate-shaped part.

The second wall portion 72d bends and extends from the first wall portion 72c. In the present embodiment, the second wall portion 72d bends from the first wall portion 72c and extends in the axial direction. More specifically, the second wall portion 72d extends from the rear end (−X side) end of the first wall portion 72c to the left side (+ Y side). As shown in FIG. 5, in the present embodiment, the left end portion of the second wall portion 72d is located on the left side of the ventilation hole 66. That is, in the present embodiment, the second wall portion 72d extends from the right side (−Y side) of the ventilation hole 66 to the left side of the ventilation hole 66. As a result, the second wall portion 72d has a portion whose axial position is the same as the axial position of the ventilation hole 66. The left end of the second wall 72d may be located on the right side (−Y side) of the ventilation hole 66. That is, the second wall portion 72d does not have to have a portion whose axial position is the same as the axial position of the ventilation hole 66.

As shown in FIG. 7, the second wall portion 72d has, for example, a plate shape in which the plate surface faces the front-rear direction. More specifically, the plate surface of the second wall portion 72d faces a direction slightly inclined in the vertical direction with respect to the front-rear direction. The dimension of the second wall portion 72d is separated from the first wall portion 72c to the left side (+ Y side) in the direction orthogonal to the direction in which the second wall portion 72d extends in the direction parallel to the plate surface of the second wall portion 72d. It becomes smaller as it becomes. That is, the width of the second wall portion 72d becomes smaller toward the left side. The shape of the second wall portion 72d is, for example, an elongated substantially triangular shape when viewed in a direction orthogonal to the plate surface of the second wall portion 72d.

As shown in FIG. 4, at least a part of the shielding portion 72b closes at least a part of the gap between the inner surface of the housing 6 and the barrier portion 65. In the present embodiment, the portion of the first wall portion 72c excluding the lower end portion closes a part of the stretch gap portion G from the right side (−Y side). The lower end of the first wall 72c comes into contact with, for example, the right end of the facing wall 65b. The second wall portion 72d closes at least a part of the stretching gap portion G. In the present embodiment, the second wall portion 72d closes a part of the stretching gap portion G from the rear side (−X side). In the present embodiment, the second wall portion 72d is arranged away from the inner side surface of the housing 6. In other words, in this embodiment, the second wall portion 72d is not in contact with the housing 6. As shown in FIG. 5, a gap is provided between the second wall portion 72d and the inclined surface 65f of the facing wall portion 65b. A gap is provided between the second wall portion 72d and the inclined surface 61e of the upper side wall portion 61c.

As shown in FIG. 7, in the present embodiment, the rotation stop portion 72e is provided on the upper edge portion of the first wall portion 72c. The rotation stop portion 72e has a base portion 72g and a main body portion 72h. The base portion 72g projects upward from the upper edge portion of the first wall portion 72c. The base portion 72g has, for example, a plate shape in which the plate surface faces the axial direction. The main body 72h projects to the left (+ Y side) from the upper end of the base 72g. The main body 72h has a plate shape with the plate surface facing in the vertical direction. The left end of the main body 72h is located on the right side (−Y side) of the left end of the second wall 72d. The axial dimension of the main body 72h is smaller than the axial dimension of the second wall 72d.

As shown in FIG. 4, the main body portion 72h is inserted into the rotation stop recess 65d from the right side (−Y side). The main body 72h is hooked on the inner surface of the rotation stop recess 65d in a direction orthogonal to the axial direction. As a result, the rotation stop portion 72e is hooked on the housing 6. By hooking the rotation stop portion 72e on the housing 6, it is possible to prevent the mounting member 70 from rotating around the central axis of the bolt 73 that fixes the fixed portion 72a. Therefore, even if the mounting member 70 is fixed with one bolt 73, it is possible to prevent the mounting member 70 from being displaced. This makes it possible to simplify the work of attaching the mounting member 70 to the housing 6 and prevent the position of the pipe member main body 11a attached to the housing 6 via the mounting member 70 from shifting. Therefore, it is possible to prevent the positions of the injection ports provided on the pipe member main body 11a from shifting, and it is possible to preferably supply the oil O to each portion.

In the present specification, the "flange portion of the mounting member" means a portion protruding from the main body of the pipe member to the outside of the main body of the pipe member and having a fixed portion fixed to the housing.

As shown in FIG. 2, the second pipe member 12 is located on the front side (+ X side) of the stator 30 in the front-rear direction orthogonal to both the axial direction and the vertical direction of the motor shaft J1. More specifically, the second pipe member 12 is located on the front side of the stator core 32. In the present embodiment, at least a part of the second pipe member 12 overlaps with the shaft 21 when viewed in the front-rear direction. In the present embodiment, the entire second pipe member 12 overlaps with the shaft 21 when viewed in the front-rear direction. The second pipe member 12 is located above the motor shaft J1, for example. The radial position of the second pipe member 12 is, for example, the same as the radial position of the fixing portion 32b. The second pipe member 12 is located below the first pipe member 11. The second pipe member 12 is located, for example, above the front fixing portion 32g. The upper fixing portion 32f is located between the first pipe member 11 and the second pipe member 12 in the circumferential direction. That is, the first pipe member 11 and the second pipe member 12 are arranged so as to sandwich the upper fixing portion 32f in the circumferential direction.

As shown in FIG. 6, in the present embodiment, the second pipe member 12 has a cylindrical shape extending in the axial direction. The second pipe member 12 has, for example, a cylindrical shape that opens to the left side (+ Y side). The second pipe member 12 is made of resin, for example. Although not shown, the second pipe member 12 is fixed to the housing 6. The second pipe member 12 may be fixed to the housing 6 in the same manner as the first pipe member 11, for example.

The right end (−Y side) of the second pipe member 12 is closed. Although not shown, the left end (+ Y side) end of the second pipe member 12 is fitted into a hole provided in the partition wall 63. The hole into which the left end of the second pipe member 12 is fitted is connected to the fourth flow path 94 provided in the partition wall 63. As a result, the inside of the second pipe member 12 is connected to the fourth flow path 94.

The second pipe member 12 has a flow path 18 through which the oil O flows. The inner surface of the flow path 18 is the inner surface of the cylindrical second pipe member 12. The flow path 18 extends in the axial direction and opens to the left side (+ Y side). The opening on the left side of the flow path 18 connects to the fourth flow path 94. Oil O flows into the flow path 18 from the fourth flow path 94. The oil O flows from the left side to the right side (−Y side) in the flow path 18 of the present embodiment. The cross-sectional shape of the flow path 18 is, for example, a circular shape. In the present embodiment, the flow path cross section of the flow path 18 is a cross section orthogonal to the axial direction in the flow path 18. The right end of the flow path 18 is closed.

The second pipe member 12 has a plurality of second injection ports 15. From the second injection port 15, the oil O that has flowed into the second pipe member 12 is injected toward the stator 30. As a result, the second pipe member 12 injects oil O as a refrigerant into the stator 30. The second injection port 15 is provided on the outer peripheral surface of the second pipe member 12. The plurality of second injection ports 15 are arranged at intervals along the axial direction. The number of the second injection ports 15 provided in the second pipe member 12 is larger than the number of the second injection ports 14 provided in the first pipe member 11. For example, six second injection ports 15 are provided. The second injection port 15 is an opening that opens to the outer peripheral surface of the second pipe member 12 among the openings of the holes that penetrate the wall portion of the second pipe member 12 from the inner peripheral surface to the outer peripheral surface. The second injection port 15 has, for example, a circular shape.

As shown in FIG. 2, the second injection port 15 faces upward. In the present embodiment, the second injection port 15 faces diagonally upward and rearward. The second injection port 15 is located on the front side (+ X side) of the stator core 32. The oil O injected from the second injection port 15 is injected obliquely 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 second injection port 15 is an injection port that injects oil O as a refrigerant toward the stator core 32.

In the present specification, "the injection port faces upward" means that the direction of the injection port may include an upward component, the injection port may face directly upward, and the injection port is true. It may be tilted upward. As described above, the second injection port 15 of the present embodiment faces in a direction obliquely inclined rearward with respect to directly above. In the present embodiment, "the second injection port 15 faces upward" means that the second injection port 15 may face directly upward, for example, or is inclined forward at an angle with respect to the direct upward. It may be suitable.

As described above, the first pipe member 11 and the second pipe member 12 are provided with the second injection ports 14 and 15 for supplying the oil O to the stator core 32. On the other hand, the first injection port 13 for supplying the oil O to the coil ends 33a and 33b is provided in the first pipe member 11, but is not provided in the second pipe member 12. That is, in the first pipe member 11 and the second pipe member 12, only the first pipe member 11 is provided with the first injection port 13 for supplying the oil O to the coil ends 33a and 33b. In the present embodiment, the second pipe member 12 injects oil O as a refrigerant only toward the stator core 32.

In the present embodiment, the first injection port 13, the second injection port 14, the second injection port 15, and the third injection port 16 all have the same shape and the same size. That is, the opening area of the first injection port 13, the opening area of the second injection port 14, the opening area of the second injection port 15, and the opening area of the third injection port 16 are, for example, the same as each other. Further, as described above, the total number of the first injection ports 13 is eight. The number of the second injection ports 14 is two in total. The number of the second injection ports 15 is 6 in total. Therefore, the total opening area of the second injection port 14 provided in the first pipe member 11 is smaller than the total opening area of the second injection port 15 provided in the second pipe member 12. Further, the total opening area of the first injection port 13 provided in the first pipe member 11 is provided in the total opening area of the second injection port 14 provided in the first pipe member 11 and in the second pipe member 12. It is larger than the total opening area of the second injection port 15.

In the present specification, the "total opening area of a certain injection port" is an area obtained by adding all the opening areas of a plurality of certain injection ports when a plurality of certain injection ports are provided. When only one injection port is provided, it is the opening area of the injection port. That is, for example, in the present embodiment, the total opening area of the second injection port 14 is the total area of the opening areas of the two second injection ports 14.

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 reservoir P through the first flow path 92a, and sucks up oil O from the second flow path 92b, the cooler 97, the third flow path 92c, the fourth flow path 94, and the refrigerant. Oil O is supplied to the motor 2 via the supply unit 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 member 11, and the second pipe member 12. Therefore, the oil O can be easily sent to the first pipe member 11 and the second pipe member 12. As a result, the oil O can be supplied to the stator 30 from the first pipe member 11 and the second pipe member 12, and the stator 30 can be cooled. Further, oil O can be supplied from the first pipe member 11 to the bearings 26 and 27 as lubricating oil.

The oil O supplied from the first pipe member 11 and the second pipe member 12 to the stator 30 is dropped downward and accumulated in the lower region in the motor accommodating portion 61. Further, the oil O supplied to the bearings 26 and 27 may also be 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 63a provided in the partition wall 63. As described above, the second oil passage 92 supplies the oil O to the stator 30 and the bearings 26 and 27.

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.

The oil O in the housing 6 such as the oil O injected into the housing 6 from the first pipe member 11 and the second pipe member 12 may reach the ventilation hole 66 of the breather 80 by being scattered in the housing 6 or the like. Conceivable. Therefore, there is a risk that the oil O leaks to the outside of the housing 6 via the breather 80.

On the other hand, according to the present embodiment, the shielding portion 72b is arranged in the portion of the inside of the housing 6 connected to the ventilation hole 66. Therefore, at least a part of the oil O directed to the ventilation hole 66 can be shielded by the shielding portion 72b. As a result, it is possible to prevent the oil O from reaching the ventilation holes 66. Therefore, it is possible to prevent the oil O from leaking to the outside of the housing 6.

Further, according to the present embodiment, the shielding portion 72b is provided on the flange portion 72 having the fixed portion 72a of the first pipe member 11. That is, the shielding portion 72b is provided in the portion of the first pipe member 11 that is fixed to the housing 6. As a result, it is possible to prevent the oil O from reaching the ventilation hole 66 by using the portion of the first pipe member 11 for fixing to the housing 6 without separately providing a member for shielding the oil O. .. Therefore, it is possible to suppress an increase in the number of parts of the drive device 1 while suppressing the arrival of the oil O at the breather 80.

Further, since the shielding portion 72b can be fixed to the housing 6 by using the portion of the housing 6 for fixing the first pipe member 11, it is necessary to separately provide a portion for fixing the member for shielding the oil O in the housing 6. There is no. Therefore, it is possible to prevent the shape of the housing 6 from becoming complicated. Further, since the shielding portion 72b can be attached to the housing 6 by attaching the first pipe member 11 to the housing 6, it is not necessary to separately attach the member for shielding the oil O to the housing 6. Therefore, it is possible to suppress an increase in the number of man-hours for assembling the drive device 1.

Further, according to the present embodiment, the housing 6 has a barrier portion 65 facing a portion of the inside of the housing 6 where the inner opening 66a of the ventilation hole 66 opens. Therefore, the barrier portion 65 can shield at least a part of the oil O toward the inner opening 66a. As a result, the arrival of the oil O at the breather 80 can be further suppressed. Further, the fixed portion 72a of the flange portion 72 is fixed to the barrier portion 65. Therefore, it is easy to arrange the shielding portion 72b provided on the flange portion 72 at a position where the oil O toward the inner opening 66a can be suitably shielded.

Further, according to the present embodiment, the barrier portion 65 has an facing wall portion 65b facing the inner opening 66a via a gap. Therefore, the inner opening 66a can be covered by the facing wall portion 65b. As a result, the facing wall portion 65b can further prevent the oil O from reaching the inner opening 66a. Therefore, the arrival of the oil O at the breather 80 can be further suppressed.

Further, according to the present embodiment, at least a part of the shielding portion 72b closes at least a part of the gap between the inner surface of the housing 6 and the barrier portion 65. Therefore, at least a part of the entry path of the oil O into the ventilation hole 66 which is not covered by the barrier portion 65 can be blocked by the shielding portion 72b. As a result, the arrival of the oil O at the breather 80 can be further suppressed.

Further, according to the present embodiment, the shielding portion 72b has a first wall portion 72c extending from the fixed portion 72a and a second wall portion 72d bent and extended from the first wall portion 72c. Therefore, the shielding portion 72b can shield the oil O toward the ventilation hole 66 by the two wall portions extending in different directions. As a result, the oil O directed from the plurality of directions toward the ventilation holes 66 can be easily shielded by the shielding portion 72b. Therefore, the arrival of the oil O at the breather 80 can be further suppressed.

Further, according to the present embodiment, the barrier portion 65 extends in the axial direction. The fixed portion 72a is fixed to the axial end portion of the barrier portion 65. The gap between the inner surface of the housing 6 and the barrier portion 65 includes an extension gap portion G extending in the axial direction. The second wall portion 72d bends from the first wall portion 72c and extends in the axial direction to close at least a part of the stretch gap portion G. By providing the second wall portion 72d that bends from the first wall portion 72c in this way, the flange portion 72 is fixed to the axial end portion of the barrier portion 65, and the stretched gap portion that tends to be relatively long in the axial direction is provided. G is suitably easily closed by the second wall portion 72d. Therefore, the arrival of the oil O at the breather 80 can be further suppressed.

Further, according to the present embodiment, the width of the stretch gap portion G becomes narrower toward the left side, and the width of the second wall portion 72d becomes smaller toward the left side. Therefore, the stretched gap G can be suitably closed by the second wall portion 72d according to the shape of the stretched gap G. As a result, the arrival of the oil O at the breather 80 can be further suppressed. Further, the second wall portion 72d can be prevented from interfering with the housing 6.

Further, according to the present embodiment, the second wall portion 72d is arranged away from the inner side surface of the housing 6. Therefore, for example, even when the second wall portion 72d vibrates, it is possible to suppress the vibration of the second wall portion 72d from being transmitted to the housing 6. Further, for example, since it is possible to suppress the vibrating second wall portion 72d from colliding with the inner surface of the housing 6, it is possible to suppress the generation of noise. Further, by providing a gap between the second wall portion 72d and the inner surface of the housing 6, an air passage that flows between the inside of the housing 6 and the outside of the housing 6 via the breather 80 is suitably secured. It's easy to do.

Further, according to the present embodiment, the pipe member main body 11a extends in the axial direction of the motor shaft J1. Therefore, the oil O injected from the first injection port 13 and the second injection port 14 of the pipe member main body 11a can be easily supplied to the entire axial direction of the stator 30. This makes it easier to cool the stator 30. Further, the flange portion 72 projects from the pipe member main body 11a in a direction orthogonal to the axial direction of the motor shaft J1. Therefore, when assembling the drive device 1, a method is adopted in which the bolt 73 is passed through the flange portion 72 in the same direction as the pipe member main body 11a is inserted into the housing 6 to fix the flange portion 72 to the housing 6. Cheap. As a result, the first pipe member 11 can be easily attached while the stator 30 is suitably cooled.

Further, according to the present embodiment, the ventilation hole 66 is provided in the upper side wall portion 61c of the housing 6. Therefore, the oil O in the housing 6 can be made less likely to reach the ventilation holes 66. As a result, the arrival of the oil O at the breather 80 can be further suppressed.

Further, when a part of the mounting member 70 is embedded and held in the pipe member main body 11a and the mounting member 70 has a flange portion 72 protruding from the pipe member main body 11a as in the present embodiment, the pipe member main body 11a A part of the oil O flowing in the flow path 17 may enter between the held portion 71 embedded in the pipe member and the pipe member main body 11a. Therefore, the oil O that has entered between the held portion 71 and the pipe member main body 11a may leak to the outside of the first pipe member 11 via the flange portion 72 and the pipe member main body 11a.

On the other hand, according to the present embodiment, a part of the pipe member main body 11a is located inside the first through hole 71a penetrating the held portion 71, and the first through hole 71a is the flow path 17. Is located between the flow path 17 and the flange portion 72 when viewed in the axial direction in which the Therefore, even when a part of the oil O in the flow path 17 enters between the held portion 71 and the pipe member main body 11a, the flange portion 72 is between the held portion 71 and the pipe member main body 11a. At least a part of the oil O flowing toward the surface can be blocked by a part of the pipe member main body 11a located in the first through hole 71a. As a result, even when a part of the oil O in the flow path 17 enters between the held portion 71 and the pipe member main body 11a, the oil O reaches between the flange portion 72 and the pipe member main body 11a. It can be suppressed from reaching. Therefore, it is possible to prevent the oil O from leaking to the outside of the first pipe member 11 from between the flange portion 72 and the pipe member main body 11a. Therefore, it is possible to suppress a decrease in the amount of oil O supplied to the motor 2 from each injection port of the first pipe member 11. As a result, the oil O can be suitably supplied to the stator 30 and the bearings 26 and 27. Therefore, the stator 30 can be suitably cooled, and the shaft 21 can be suitably supported by the bearings 26 and 27. Further, since it is possible to prevent the oil O from leaking to the outside of the first pipe member 11 from an unintended portion, it is possible to prevent the oil O from being applied to an unintended portion in the drive device 1.

Further, according to the present embodiment, a part of the mounting member 70 is exposed inside the flow path 17. Therefore, the oil O flowing in the flow path 17 easily enters between the held portion 71 and the pipe member main body 11a from between the portion of the mounting member 70 exposed inside the flow path 17 and the pipe member main body 11a. .. On the other hand, according to the present embodiment, as described above, even if the oil O enters between the held portion 71 and the pipe member main body 11a, the oil O leaks to the outside of the first pipe member 11. Can be suppressed. As described above, the effect of suppressing the oil O from leaking to the outside of the first pipe member 11 can be obtained more usefully in the configuration in which a part of the mounting member 70 is exposed inside the flow path 17.

Further, when the tube member main body 11a is molded by insert molding using the mounting member 70 as an insert member, it is exposed inside the flow path 17 of the mounting member 70 with respect to the mold for molding the flow path 17. A molding method in which the parts are brought into contact with each other can be adopted. Therefore, when performing insert molding, the mounting member 70 can be brought into contact with the mold for easy positioning. As a result, the mounting member 70 can be held with respect to the pipe member main body 11a with high positional accuracy.

Further, according to the present embodiment, the held portion 71 has a second through hole 71b that penetrates the held portion 71. At least a part of the inner peripheral surface of the second through hole 71b is exposed inside the flow path 17. Therefore, of the inner peripheral surface of the second through hole 71b and the inner peripheral surface of the flow path 17, oil O is generated between the held portion 71 and the pipe member main body 11a from between the inner peripheral surface of the pipe member main body 11a. Easy to get in. On the other hand, according to the present embodiment, as described above, even if the oil O enters between the held portion 71 and the pipe member main body 11a, the oil O leaks to the outside of the first pipe member 11. Can be suppressed. As described above, the effect of suppressing the oil O from leaking to the outside of the first pipe member 11 is that at least a part of the inner peripheral surface of the second through hole 71b of the held portion 71 is exposed inside the flow path 17. It is obtained more usefully in the configuration.

Further, when performing insert molding, the mold for molding the flow path 17 can be passed through the second through hole 71b, and the mold can be brought into contact with the inner peripheral surface of the second through hole 71b. As a result, when performing insert molding, the mold and the mounting member 70 can be easily brought into contact with each other, and the mounting member 70 can be easily positioned by the mold.

Further, according to the present embodiment, at least a part of the flow path 17 has a flow path cross-sectional area that becomes smaller toward the downstream side in the flow direction of the oil O in the flow path 17. Here, the pressure of the oil O tends to decrease due to the pressure loss toward the downstream side. On the other hand, when the cross-sectional area of the flow path becomes smaller, the pressure of the oil O rises. Therefore, it is easy to maintain the pressure of the oil O flowing in the flow path 17 by reducing the cross-sectional area of the flow path toward the downstream side. As a result, it is easy to equalize the momentum of the oil O injected from each injection port of the first pipe member 11.

In the present embodiment, the flow path 17 has a first flow path portion 17a in which the cross-sectional area of the flow path decreases toward the downstream side in the flow direction of the oil O in the flow path 17. Therefore, it is easy to maintain the pressure of the oil O flowing in the first flow path portion 17a. Further, as in the present embodiment, it is possible to adopt a configuration in which the inner peripheral surface of the first flow path portion 17a is a tapered surface whose inner diameter increases toward the upstream side. Therefore, after the pipe member main body 11a is molded by insert molding, it is easy to pull out the mold for molding the flow path 17 from the upstream side.

Further, according to the present embodiment, the flow path 17 has a second flow path portion 17b which is connected to the downstream side of the first flow path portion 17a and has a constant flow path cross-sectional area. The portion of the mounting member 70 that is exposed to the inside of the flow path 17 is exposed to the inside of the upstream end of the second flow path portion 17b. Therefore, at the time of insert molding, the portion of the mounting member 70 exposed inside the flow path 17 is in contact with the portion of the mold for molding the flow path 17 for molding the second flow path portion 17b. Can be made to. As a result, at the time of insert molding, the mounting member 70 can be brought into contact with the axially straight surface of the outer peripheral surface of the mold for forming the flow path 17. Therefore, the mounting member 70 can be stably brought into contact with the mold, and the mounting member 70 can be positioned more accurately. Further, by exposing the portion of the mounting member 70 that is exposed to the inside of the flow path 17 to the inside of the upstream end of the second flow path portion 17b, the portion of the mounting member 70 that is exposed to the inside of the flow path 17 The entire flow path 17 located on the upstream side of the exposed portion can be the first flow path portion 17a. Therefore, it is easy to make the first flow path portion 17a relatively long. As a result, the portion of the pipe member main body 11a provided with the punching taper can be lengthened, and the mold for forming the flow path 17 can be more easily pulled out.

Further, according to the present embodiment, the entire portion of the mounting member 70 excluding the flange portion 72 is embedded inside the pipe member main body 11a. Therefore, even if a part of the oil O in the flow path 17 enters between the held portion 71 and the pipe member main body 11a, the oil O that has entered is the first except between the flange portion 72 and the pipe member main body 11a. It does not easily leak to the outside of the pipe member 11. As a result, it is possible to further prevent the oil O from leaking to the outside of the first pipe member 11.

Further, according to the present embodiment, the held portion 71 has a recess 71d provided in a portion of the held portion 71 that is closer to the flange portion 72 than the flow path 17. Therefore, when a part of the oil O in the flow path 17 enters between the held portion 71 and the pipe member main body 11a, the path toward the flange portion 72 of the entered oil O is likely to be narrowed by the recess 71d. .. As a result, it is possible to further prevent the oil O that has entered between the held portion 71 and the pipe member main body 11a from leaking from between the flange portion 72 and the pipe member main body 11a. Therefore, it is possible to further suppress the oil O from leaking to the outside of the first pipe member 11.

Further, according to the present embodiment, the recess 71d is recessed in a direction orthogonal to the axial direction in which the first through hole 71a penetrates the held portion 71, and is recessed toward the first through hole 71a. Therefore, the portion of the held portion 71 between the recess 71d and the first through hole 71a can be suitably narrowed. As a result, the path of the oil O that has entered between the held portion 71 and the pipe member main body 11a toward the flange portion 72 can be more preferably narrowed by the recess 71d. Therefore, it is possible to further suppress the oil O from leaking to the outside of the first pipe member 11.

Further, according to the present embodiment, the injection port of the pipe member main body 11a includes a first injection port 13, a second injection port 14, and a third injection port 16 as injection ports that open toward the motor 2. As described above, in the present embodiment, since the oil O can be suppressed from leaking to the outside of the first pipe member 11, the oil O is injected from the first injection port 13, the second injection port 14, and the third injection port 16. It is possible to suppress a decrease in the amount of oil O. Therefore, it is possible to suppress a decrease in the amount of oil O supplied to the stator 30 as a refrigerant from the first injection port 13 and the second injection port 14. Therefore, it is possible to suppress a decrease in the cooling efficiency of the motor 2. Further, it is possible to suppress a decrease in the amount of oil O supplied to the bearings 26 and 27 as lubricating oil from the third injection port 16.

<Second Embodiment>
As shown in FIG. 10, the barrier portion 165 in the housing 106 of the present embodiment has a pair of protruding wall portions 165a and 165b and an opposing wall portion 165c. The pair of protruding wall portions 165a and 165b project downward from the upper side wall portion 61c. The protruding wall portion 165a and the protruding wall portion 165b are arranged at intervals in the front-rear direction, for example. The protruding wall portion 165a projects downward from a portion of the upper side wall portion 61c located on the front side (+ X side) of the inner opening portion 66a. The protruding wall portion 165b projects downward from a portion of the upper side wall portion 61c located on the rear side (−X side) of the inner opening portion 66a. In the present embodiment, the inner opening 66a is provided in a portion of the upper side wall portion 61c located between the protruding wall portion 165a and the protruding wall portion 165b in the front-rear direction.

The facing wall portion 165c extends in the front-rear direction. The facing wall portion 165c connects the lower end portion of the protruding wall portion 165a and the lower end portion of the protruding wall portion 165b. The facing wall portion 165c is located below the inner opening 66a. The facing wall portion 165c faces the inner opening 66a in the vertical direction through a gap. In the present embodiment, the portion of the inside of the housing 106 where the inner opening 66a opens includes a portion surrounded by the upper side wall portion 61c and the barrier portion 165.

In the first pipe member 111 of the present embodiment, the flange portion 172 of the mounting member 170 extends from the pipe member main body 11a to the rear side (−X side). The direction in which the flange portion 172 extends is, for example, parallel to the front-rear direction. The flange portion 172 has, for example, a rectangular plate shape whose plate surface faces in the axial direction. The flange portion 172 has a pair of fixed portions 172a and 172b and a shielding portion 172c. The fixed portion 172a and the fixed portion 172b are arranged so as to sandwich the shielding portion 172c in the front-rear direction. The fixed portion 172a is connected to the front side (+ X side) of the shielding portion 172c. The fixed portion 172b is connected to the rear side of the shielding portion 172c. The fixed portion 172a is fixed to the right end (-Y side) of the protruding wall portion 165a with a bolt 73. The fixed portion 172b is fixed to the right end of the protruding wall portion 165b with a bolt 73.

The shielding portion 172c is located on the right side (-Y side) of the portion of the inside of the housing 106 surrounded by the upper side wall portion 61c and the barrier portion 165. The shielding portion 172c closes a part of the inside of the housing 106 surrounded by the upper side wall portion 61c and the barrier portion 165 from the right side. As a result, the shielding portion 172c can prevent the oil O from entering the portion of the inside of the housing 106 surrounded by the upper side wall portion 61c and the barrier portion 165 from the right side. Therefore, the arrival of the oil O at the breather 80 can be suppressed. The shielding portion 172c is arranged, for example, at a distance above the facing wall portion 165c. Other configurations of this embodiment can be made in the same manner as other configurations of the first embodiment.

<Third Embodiment>
As shown in FIG. 11, the first pipe member 211 of the present embodiment includes a pipe member main body 211a and a mounting member 270. The inner peripheral surface of the flow path 217 in the pipe member main body 211a of the present embodiment is composed of only the inner peripheral surface of the pipe member main body 211a made entirely of resin. In other words, in the present embodiment, the metal mounting member 270 is not exposed inside the flow path 217.

In the present embodiment, the held portion 271 of the mounting member 270 has a first through hole 271a that penetrates the held portion 271 in the axial direction. In this embodiment, a plurality of first through holes 271a are provided. Two first through holes 271a are provided, for example. The two first through holes 271a are provided in the narrow portion 71e. The two first through holes 271a are arranged at intervals in a direction obliquely inclined in the front-rear direction with respect to the vertical direction, for example. Each of the two first through holes 271a is filled with a part of the pipe member main body 211a. The inner diameters of the two first through holes 271a are, for example, the same as each other.

In the present embodiment, the held portion 271 has a second through hole 271b that axially penetrates the held portion 271. A part of the pipe member main body 211a is located inside the second through hole 271b. In the second through hole 271b in the present embodiment, an annular annular portion 211e centered on the central axis J4 of the pipe member main body 211a is located as a part of the pipe member main body 211a. The outer peripheral surface of the annular portion 211e comes into contact with the inner peripheral surface of the second through hole 271b over the entire circumference. The inner peripheral surface of the annular portion 211e forms a part of the inner peripheral surface of the flow path 217. Other configurations of this embodiment can be made in the same manner as other configurations of the other embodiments described above.

Even when the mounting member 270 is not exposed inside the flow path 217 as in the present embodiment, the inside of the flow path 217 is caused by, for example, wear of the annular portion 211e or molding failure in the annular portion 211e. Oil O may enter between the held portion 271 and the pipe member main body 211a. Even in such a case, since the first through hole 271a in which a part of the pipe member main body 211a is located is provided between the flow path 217 and the flange portion 72, the same as in the first embodiment. , Oil O can be prevented from leaking to the outside of the first pipe member 211.

Further, according to the present embodiment, a plurality of first through holes 271a are provided. Therefore, the oil O that has entered between the held portion 271 and the pipe member main body 211a may be blocked from going toward the flange portion 72 by a part of the pipe member main body 211a located in the plurality of first through holes 271a. can. As a result, it is possible to further prevent the oil O from leaking to the outside of the first pipe member 211. Further, by locating a part of the pipe member main body 211a inside the plurality of first through holes 271a, the mounting member 270 can be held more firmly with respect to the pipe member main body 211a.

<Fourth Embodiment>
As shown in FIG. 12, the first pipe member 311 of the present embodiment includes a pipe member main body 311a and a mounting member 370. The pipe member main body 311a of the present embodiment has a holding portion 311f located on the right side (−Y side) of the flow path 317. The holding portion 311f holds the held portion 371 of the mounting member 370. In this embodiment, the mounting member 370 is located on the right side of the flow path 317. In the present embodiment, the mounting member 370 is not exposed inside the flow path 317.

The held portion 371 has an exposed portion 371d exposed on the outer peripheral surface of the pipe member main body 311a. The exposed portion 371d is, for example, a portion of the held portion 371 that is located on the opposite side of the held portion 371 with respect to the portion to which the flange portion 72 is connected with the central axis J4 interposed therebetween. The held portion 371 has a first through hole 371a and a third through hole 371c. The first through hole 371a and the third through hole 371c penetrate the held portion 371 in the axial direction. The inside of the first through hole 371a and the inside of the third through hole 371c are filled with a part of the pipe member main body 311a.

The first through hole 371a is located between the flow path 317 and the flange portion 72 when viewed in the axial direction in which the flow path 317 extends. The third through hole 371c is located between the flow path 317 and the exposed portion 371d when viewed in the axial direction in which the flow path 317 extends. In the present embodiment, the held portion 371 does not have a second through hole, unlike the first embodiment. Other configurations of the present embodiment can be made in the same manner as the configurations of the other embodiments described above.

Even with the configuration as in this embodiment, for example, the holding portion 311f located on the downstream side (right side, −Y side) of the flow path 317 is worn out, or the holding portion 311f is defective in molding. The oil O in the path 317 flows further downstream (right side, −Y side) inside the holding portion 311f, and the portion of the held portion 371 that overlaps with the flow path 317 when viewed in the axial direction and the pipe member main body 311a. There is a risk of getting in between. In this case, the oil O that has entered may flow downward in FIG. 12 and leak to the outside from between the flange portion 72 and the pipe member main body 311a.

On the other hand, according to the present embodiment, since the first through hole 371a is provided between the flow path 317 and the flange portion 72 when viewed in the axial direction, the pipe member located inside the first through hole 371a. A part of the main body 311a can prevent the oil O that has entered between the held portion 371 and the pipe member main body 311a from going toward the flange portion 72. Therefore, it is possible to prevent the oil O from leaking to the outside of the first pipe member 311 via between the flange portion 72 and the pipe member main body 311a.

Further, in the present embodiment, the held portion 371 has an exposed portion 371d. Therefore, the oil O that has entered between the portion of the held portion 371 that overlaps the flow path 317 when viewed in the axial direction and the pipe member main body 311a flows upward in FIG. 12, and the exposed portion 371d and the pipe member main body 311a There is also a risk of leaking to the outside from between.

On the other hand, according to the present embodiment, since the third through hole 371c is provided between the flow path 317 and the exposed portion 371d when viewed in the axial direction, the pipe member located inside the third through hole 371c. A part of the main body 311a can prevent the oil O that has entered between the held portion 371 and the pipe member main body 311a from going toward the exposed portion 371d. Therefore, it is possible to prevent the oil O from leaking to the outside of the first pipe member 311 via the exposed portion 371d and the pipe member main body 311a.

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 fluid is oil O has been described, but the present invention is not limited to this. The fluid is not particularly limited. The fluid may be, for example, an insulating liquid or water. When the fluid is water and the fluid is supplied to the stator, the surface of the stator may be insulated.

The barrier portion may have any shape and may be provided at any position as long as it faces the portion of the inside of the housing where the inner opening of the ventilation hole opens. The barrier portion may or may not have a facing wall portion and may not have a protruding wall portion. That is, for example, in the first embodiment described above, the barrier portion 65 may be composed of only the protruding wall portion 65a or may be composed of only the facing wall portion 65b. The barrier portion may not be provided. The breather is not particularly limited as long as it has a vent. The breather does not have to have a breather pipe. The ventilation holes may be provided at any part of the housing as long as they connect the inside and the outside of the housing. The shape of the vent is not particularly limited. The breather does not have to be provided.

The pipe member main body may be opened on both sides in the direction in which the pipe member main body extends. In each of the above-described embodiments, the first pipe member is a pipe member having a pipe member main body and a mounting member, but the present invention is not limited to this. For example, the second pipe member may be a pipe member having a pipe member main body and a mounting member, or both the first pipe member and the second pipe member may be a pipe member having a pipe member main body and a mounting member. There may be. In this case, for example, a breather is provided near the second pipe member. The flow path of the pipe member may have any shape. The flow path cross-sectional area of the flow path of the pipe member may be constant over the entire flow path. The target to which the fluid injected from the injection port of the pipe member is supplied is not particularly limited. The injection port does not have to include an injection port that opens toward the motor. The injection port may include an injection port that supplies oil to the speed reducer. For example, in the above-described embodiment, the injection port of the pipe member main body 11a may include only the third injection port 16 that supplies the oil O to the bearings 26 and 27. That is, the pipe member main body 11a does not have to have the first injection port 13 and the second injection port 14. Further, for example, the injection port of the pipe member main body 11a may include only the first injection port 13 and the second injection port 14 that supply the oil O as a refrigerant to the stator 30 of the motor 2. That is, the pipe member main body 11a does not have to have the third injection port 16 for supplying the oil O to the bearings 26 and 27. The number of injection ports provided on the pipe member is not particularly limited as long as it is one or more.

The material of the mounting member is not particularly limited as long as it is a material different from the material of the tube member main body. The material of the mounting member may be a material other than metal. The material of the mounting member may be a resin of a type different from the resin constituting the main body of the pipe member. The mounting member may have a portion protruding from the main body of the pipe member to the outside of the main body of the pipe member, in addition to the flange portion provided with the fixed portion. In this case, the held portion may have a fourth through hole located between the flow path and the protruding portion when viewed in the direction in which the flow path extends. A part of the pipe member main body is located inside the fourth through hole. According to this configuration, it is possible to prevent the fluid in the flow path from leaking from between the protruding portion and the main body of the pipe member by a part of the main body of the pipe member located inside the fourth through hole. In the first embodiment described above, the held portion 71 may have an exposed portion exposed on the outer peripheral surface of the pipe member main body 11a, as in the exposed portion 371d of the fourth embodiment.

The shielding portion may have any shape and may be arranged at any position as long as it can shield at least a part of the oil O toward the ventilation holes. For example, in the first embodiment described above, the shielding portion 72b may be composed of only the first wall portion 72c. The fixed portion may be fixed to the housing by a plurality of bolts. The fixed portion may be fixed to a portion of the housing other than the barrier portion. The second wall may come into contact with the inner surface of the housing. The shielding portion may not be provided.

The rotation stopper may have any configuration as long as it can be hooked on the housing. The rotation stopper may be, for example, a hole through which a protrusion provided on the housing is passed. In this case, it is possible to prevent the inner peripheral surface of the hole from being caught by the protrusion and the mounting member from rotating with respect to the housing. Further, the rotation stopper may be a protrusion that engages with a protrusion provided on the housing. In this case, it is possible to prevent the protrusions from getting caught and the mounting member from rotating with respect to the housing. The rotation stopper may not be provided.

The first through hole provided in the held portion may have any shape. The number of first through holes is not particularly limited. A part of the pipe member main body may be provided only in a part of the inside of the first through hole. In the first embodiment, the third embodiment, and the fourth embodiment described above, the held portion does not have to have the third through hole. Only one recess may be provided in the portion of the held portion closer to the flange portion than the flow path, or three or more recesses may be provided. The recess does not have to be recessed toward the first through hole. The recess 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. 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. Further, in the above-described embodiment, the case where the drive device does not include the inverter unit has been described, but the present invention is not limited to this. The drive device may include an inverter unit. In other words, the drive device may be integrated with the inverter unit.

The use of the drive device is not particularly limited. The drive device does not have to be mounted on the vehicle. As described above, the configurations and methods described in the present specification can be appropriately combined within a range that does not contradict each other.

1 ... Drive device, 2 ... Motor, 6,106 ... Housing, 11,111,211,311 ... First pipe member (tube member), 11a, 211a, 311a ... Pipe member body, 13 ... First injection port (injection) Port), 14 ... 2nd injection port (injection port), 16 ... 3rd injection port (injection port), 17,217,317 ... Flow path, 17a ... 1st flow path section, 17b ... 2nd flow path section, 70, 170, 270, 370 ... mounting member, 71,271,371 ... held portion, 71a, 271a, 371a ... first through hole, 71b, 271b ... second through hole, 71d ... recess, 72,172 ... flange Part, 72a, 172a, 172b ... Fixed part, O ... Oil (fluid)

Claims (11)

With the motor
A housing that houses the motor inside
The pipe member attached to the housing and
With
The pipe member is
A pipe member main body having a flow path and an injection port connected to the flow path, and
A mounting member held by the pipe member body and attached to the housing,
Have,
The main body of the pipe member is made of resin and is made of resin.
The material of the mounting member is different from the material of the pipe member main body.
The mounting member
The held portion embedded and held in the main body of the pipe member,
A flange portion protruding from the pipe member body to the outside of the pipe member body,
Have,
The flange portion has a fixed portion fixed to the housing and has a fixed portion.
The held portion has a first through hole that penetrates the held portion.
A part of the pipe member main body is located inside the first through hole.
The first through hole is a driving device located between the flow path and the flange portion when viewed in the direction in which the flow path extends. The driving device according to claim 1, wherein the mounting member is made of metal. The driving device according to claim 1 or 2, wherein a part of the mounting member is exposed inside the flow path. The held portion has a second through hole that penetrates the held portion.
The driving device according to claim 3, wherein at least a part of the inner peripheral surface of the second through hole is exposed inside the flow path. The flow path is
A first flow path portion in which the cross-sectional area of the flow path decreases toward the downstream side in the flow direction of the fluid in the flow path.
A second flow path portion connected to the downstream side of the first flow path portion and having a constant flow path cross-sectional area,
Have,
The driving device according to claim 3 or 4, wherein the portion of the mounting member exposed to the inside of the flow path is exposed to the inside of the upstream end portion of the second flow path portion in the flow direction. The driving device according to any one of claims 1 to 4, wherein at least a part of the flow path has a flow path cross-sectional area that becomes smaller toward the downstream side in the flow direction of the fluid in the flow path. The driving device according to any one of claims 1 to 6, wherein a plurality of the first through holes are provided. The drive device according to any one of claims 1 to 7, wherein the entire portion of the mounting member excluding the flange portion is embedded inside the pipe member main body. The driving device according to any one of claims 1 to 8, wherein the held portion has a recess provided in a portion of the held portion that is closer to the flange portion than the flow path. The driving device according to claim 9, wherein the recess is recessed in a direction orthogonal to the direction in which the first through hole penetrates the held portion and is recessed toward the first through hole. The drive device according to any one of claims 1 to 10, wherein the injection port includes an injection port that opens toward the motor.

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