CN213341914U - Motor unit - Google Patents

Abstract

The utility model provides a motor unit. The utility model discloses a motor unit's one mode has: a motor having a rotor rotatable about a motor axis and a stator located radially outside the rotor; a first supply pipe for injecting a refrigerant at least to an outer peripheral surface of the stator; a second supply pipe that injects the refrigerant at least to an outer peripheral surface of the stator and is disposed at a distance from the first supply pipe; and a coupling portion that couples the first supply pipe and the second supply pipe. The stator has a fixing portion protruding radially outward from an outer peripheral surface of the stator. The fixing portion is disposed between the first supply pipe and the second supply pipe when viewed in the radial direction, and is disposed at a distance in a direction perpendicular to the radial direction with respect to the coupling portion.

Description

Motor unit

Technical Field

The utility model relates to a motor unit.

Background

Conventionally, a motor unit having a structure for cooling a motor by a refrigerant is known. The rotating electric machine described in patent document 1 includes a housing that houses a stator, and a coolant supply pipe assembly that includes a coolant supply pipe and is separate from the housing, and the coolant supply pipe assembly includes a manifold that connects the coolant supply pipes to each other.

Patent document 1: japanese patent laid-open publication No. 2015-80330

The conventional motor unit has room for improvement in that the outer shape is kept small and the stator is uniformly cooled.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a motor unit capable of uniformly cooling a stator while suppressing an outer shape to be small.

The utility model discloses a motor unit's one mode has: a motor having a rotor rotatable about a motor axis and a stator located radially outward of the rotor; a first supply pipe that injects a refrigerant at least to an outer peripheral surface of the stator; a second supply pipe that injects the refrigerant at least to an outer peripheral surface of the stator and is disposed at a distance from the first supply pipe; and a coupling portion that couples the first supply pipe and the second supply pipe. The stator has a fixing portion protruding radially outward from an outer peripheral surface of the stator. The fixing portion is disposed between the first supply pipe and the second supply pipe when viewed in a radial direction, and is disposed at a distance in a direction perpendicular to the radial direction with respect to the connecting portion.

The fixing portion may be disposed at a distance from the coupling portion in the axial direction of the rotor when viewed in the radial direction.

The fixing portion may be disposed at a distance from the coupling portion in a direction perpendicular to the axial direction of the rotor when viewed in the radial direction.

The coupling portion may be connected to an end of the first supply pipe and an end of the second supply pipe.

The connection portion may be connected to a downstream end portion of the two end portions of the first supply pipe, and may be connected to a downstream end portion of the two end portions of the second supply pipe.

The first supply pipe may extend along a direction in which the fixing portion extends, and the second supply pipe may extend along the direction in which the fixing portion extends.

The motor unit may include a housing that houses the motor, the first supply pipe, the second supply pipe, and the coupling portion may include a mounting fixing portion fixed to the housing.

The first supply pipe, the second supply pipe, and the coupling portion may be part of one member.

The first supply pipe may have a first injection hole penetrating a peripheral wall of the first supply pipe, the second supply pipe may have a second injection hole penetrating a peripheral wall of the second supply pipe, and a distance between the first injection hole and the fixing portion and a distance between the second injection hole and the fixing portion may be identical to each other.

A first angle between an imaginary straight line passing through the center of the fixing portion and the motor axis and a center line of the first injection hole and a second angle between the imaginary straight line and a center line of the second injection hole may be the same as each other when viewed from the axial direction.

According to the motor unit of an aspect of the present invention, the outer shape can be suppressed to be small, and the stator can be uniformly cooled.

Drawings

Fig. 1 is a schematic configuration diagram schematically showing a motor unit according to the present embodiment.

Fig. 2 is a perspective view showing the stator and the refrigerant supply pipe unit of the present embodiment.

Fig. 3 is a plan view showing the stator and the refrigerant supply tube unit of the present embodiment.

Fig. 4 is a side view showing a part of the stator and the refrigerant supply pipe unit of the present embodiment, and specifically, a view of the part of the stator and the refrigerant supply pipe unit as viewed from the axial direction.

Fig. 5 is a bottom view showing the refrigerant supply pipe unit of the present embodiment.

Fig. 6 is a plan view schematically showing a stator and a refrigerant supply tube unit according to modification 1 of the present embodiment.

Fig. 7 is a plan view schematically showing a stator and a refrigerant supply tube unit according to modification 2 of the present embodiment.

Description of the reference symbols

1: a motor unit; 2: a motor; 6: a housing; 11: a first supply tube; 11 c: a first injection hole; 12: a second supply tube; 12 c: a second injection hole; 19: a connecting portion; 19 b: mounting a fixed part; 20: a rotor; 30: a stator; 32 b: a fixed part; c1, C2: a centerline; j1: a motor axis; o: oil (refrigerant); VL: an imaginary straight line; α 1: a first angle; α 2: a second angle.

Detailed Description

In the following description, the vertical direction is defined and described based on the positional relationship when the motor unit 1 of the present embodiment is mounted on a vehicle, not shown, on a horizontal road surface. In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional rectangular coordinate system. In the XYZ coordinate system, the Z-axis direction is the vertical direction. The + Z side is the upper side in the vertical direction, and the-Z side is the lower side in the vertical direction. In the present embodiment, the vertical upper side is simply referred to as "upper side", and the vertical lower side is simply referred to as "lower side". The X-axis direction is a direction perpendicular to the Z-axis direction, and is a front-rear direction of the vehicle on which the motor unit 1 is mounted. In the present embodiment, the + X side is the front side of the vehicle and the-X side is the rear side of the vehicle. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction, and is a vehicle lateral direction, that is, a vehicle width direction. In the present embodiment, the + Y side is the left side of the vehicle and the-Y side is the right side of the vehicle. The Y-axis direction corresponds to an axial direction of a motor axis J1 described later. The front-back direction and the left-right direction are horizontal directions perpendicular to the vertical direction. In the present embodiment, the left side corresponds to one axial side, and the right side corresponds to the other axial side. The front side corresponds to one horizontal side, and the rear side corresponds to the other horizontal side.

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

The motor axis J1 shown in the drawings as appropriate extends in the Y-axis direction, i.e., the left-right direction of the vehicle. In the present embodiment, unless otherwise specified, the direction parallel to the motor axis J1 is simply referred to as the "axial direction", the radial direction about the motor axis J1 is simply referred to as the "radial direction", and the circumferential direction about the motor axis J1, that is, the direction about the motor axis J1 is simply referred to as the "circumferential direction". In the present embodiment, the one side (+ Y side) in the axial direction is a direction from a motor housing portion 61 of a housing 6 described later toward a gear housing portion 62 in the axial direction. The other axial side (Y side) is a direction from the gear housing 62 to the motor housing 61 in the axial direction. A predetermined direction in the circumferential direction is referred to as a circumferential one side θ 1, and a direction opposite to the predetermined direction is referred to as a circumferential other side θ 2. In the present embodiment, one circumferential side θ 1 in the circumferential direction is a direction toward the front side (+ X side) at a position above the motor axis J1, and the other circumferential side θ 2 is a direction toward the rear side (-X side) at a position above the motor axis J1. In the present embodiment, the "parallel direction" includes a substantially parallel direction, and the "perpendicular direction" includes a substantially perpendicular direction.

The motor unit 1 of the present embodiment shown in fig. 1 is mounted on a vehicle having a motor as a power source, such as a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an Electric Vehicle (EV), and is used as the power source.

As shown in fig. 1, the motor unit 1 includes a motor 2, a transmission device 3 including a reduction gear 4 and a differential gear 5, a casing 6, a vent hole 70, a refrigerant passage 90, a refrigerant supply pipe unit 10, a pump 96, and a cooler 97. In the present embodiment, the motor unit 1 does not include an inverter unit. In other words, the motor unit 1 and the inverter unit are constructed separately. As shown in fig. 2 to 5, the refrigerant supply pipe unit 10 includes a first supply pipe 11, a second supply pipe 12, a coupling portion 19, a rib 25, a first elastic ring member 28, and a second elastic ring member 29. That is, the motor unit 1 includes the first supply pipe 11, the second supply pipe 12, the connection portion 19, the rib 25, the first elastic ring member 28, and the second elastic ring member 29. In fig. 2 and 4, the first elastic ring member 28 and the second elastic ring member 29 are not shown.

As shown in fig. 1, the housing 6 houses the motor 2, the refrigerant supply pipe unit 10, and the transmission device 3 therein. That is, the housing 6 internally houses the first supply pipe 11, the second supply pipe 12, the coupling portion 19, the rib 25, the first elastic ring member 28, and the second elastic ring member 29. The housing 6 has a motor housing 61, a gear housing 62, and a partition 61 c.

The motor housing 61 is a portion of the case 6 that houses the motor 2 and the refrigerant supply tube unit 10 inside. The motor housing 61 houses therein the rotor 20 and the stator 30, which will be described later. The gear housing 62 is a portion of the housing 6 that houses the transmission device 3 therein. The gear housing 62 is located on the left side (+ Y side) of the motor housing 61. The bottom portion 61a of the motor housing portion 61 is located above the bottom portion 62a of the gear housing portion 62. The partition wall 61c partitions and divides the interior of the motor housing portion 61 and the interior of the gear housing portion 62 in the axial direction. A partition wall opening 68 is provided in the partition wall 61 c. The partition wall opening 68 connects the inside of the motor housing portion 61 and the inside of the gear housing portion 62. The partition wall 61c is located on the left side of the stator 30.

The vent hole 70 is configured to allow the inside of the case 6 to communicate with the outside. For example, the vent hole 70 communicates the inside of the casing 6 with the outside when the internal pressure of the casing 6 is higher than the external pressure and the pressure difference between the internal pressure and the external pressure is equal to or greater than a predetermined value, or when the motor unit 1 vibrates. In the present embodiment, the vent hole 70 is provided in the top wall portion, i.e., the upper wall portion of the case 6. The vent hole 70 is provided in a top wall portion of the motor housing portion 61, for example. The vent hole 70 is disposed above the refrigerant supply tube unit 10. According to the present embodiment, the situation in which the vent hole 70 is immersed in the refrigerant such as the oil O sprayed from the refrigerant supply pipe unit 10 is suppressed. The function of the vent hole 70 is maintained well, and the performance of the motor unit 1 is stabilized. Further, the oil O can be prevented from flowing out of the case 6 through the vent hole 70.

The casing 6 accommodates oil O as a refrigerant therein. That is, in the present embodiment, the refrigerant is oil O. In the present embodiment, oil O is contained in the motor containing section 61 and the gear containing section 62. An oil reservoir P for storing oil O is provided in a lower region inside the gear housing 62. The oil O in the oil reservoir P is sent to the inside of the motor housing 61 through the refrigerant flow path 90. The oil O fed into the motor housing 61 is accumulated in a lower region of the motor housing 61. At least a part of the oil O stored in the motor housing 61 moves to the gear housing 62 through the partition wall opening 68 and returns to the oil reservoir P.

In the present specification, the phrase "oil is contained in a certain portion" means that the oil is contained in the certain portion at least in a part during driving of the motor, and the oil may not be contained in the certain portion when the motor is stopped. For example, in the present embodiment, the fact that the oil O is stored in the motor storage 61 means that the oil O may be located in the motor storage 61 during at least a part of the driving of the motor 2, and the oil O in the motor storage 61 may be entirely moved to the gear storage 62 through the partition wall opening 68 when the motor 2 is stopped. A part of the oil O that is sent to the inside of the motor housing portion 61 through the refrigerant flow path 90 may remain inside the motor housing portion 61 in a state where the motor 2 is stopped.

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

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

The shaft 21 extends in the axial direction about the motor axis J1. The shaft 21 rotates about a motor axis J1. The shaft 21 is a hollow shaft having a hollow portion 22 provided therein. A communication hole 23 is provided in the shaft 21. The communication hole 23 extends in the radial direction and connects the hollow portion 22 and the outside of the shaft 21.

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

The stator 30 is opposed to the rotor 20 with a gap in the radial direction. The stator 30 is located radially outward of the rotor 20. The outer peripheral surface of the stator 30 faces the inner peripheral surface of the housing 6. The stator 30 has a stator core 32 and a coil assembly 33. The stator core 32 is fixed to the inner circumferential surface of the motor housing 61. As shown in fig. 2 to 4, the stator core 32 has a stator core main body 32a and a fixing portion 32 b. That is, the stator 30 has a fixing portion 32 b. The stator core main body 32a has a cylindrical core back portion 32d extending in the axial direction and a plurality of teeth 32e extending radially inward from the core back portion 32 d. The plurality of teeth 32e are arranged at intervals in the circumferential direction. The plurality of teeth 32e are arranged at equal intervals over the entire circumference in the circumferential direction.

The fixing portion 32b protrudes radially outward from the outer peripheral surface of the stator core main body 32 a. That is, the fixing portion 32b protrudes radially outward from the outer peripheral surface of the stator 30. The fixing portion 32b is fixed to the motor housing portion 61. That is, the fixing portion 32b is fixed to the housing 6. The plurality of fixing portions 32b are provided at intervals in the circumferential direction. For example, four fixing portions 32b are provided. The four fixing portions 32b are arranged at equal intervals over the entire circumference in the circumferential direction.

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

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

The fixing portion 32b extends in the axial direction. In the present embodiment, the fixing portion 32b extends from the end portion on the left side (+ Y side) of the stator core 32 to the end portion on the right side (-Y side) of the stator core 32. That is, the fixing portion 32b extends over the entire length of the stator core 32 in the axial direction. The fixing portion 32b has a through hole 32c that penetrates the fixing portion 32b in the axial direction. A bolt, not shown, extending in the axial direction passes through the through hole 32 c. The bolt is inserted through the through hole 32c from the right side (Y side) and screwed into a female screw hole (not shown) provided in the motor housing portion 61 or the partition wall 61 c. By screwing a bolt into the female screw hole, the fixing portion 32b is fixed to the motor housing portion 61 or the partition wall 61 c. The outer peripheral surface of the stator core main body 32a contacts the inner peripheral surface of the motor housing portion 61 at least at one or more positions in the circumferential direction. That is, a portion of the outer peripheral surface of the stator core main body 32a located between the pair of circumferentially adjacent fixing portions 32b and a portion of the inner peripheral surface of the motor housing portion 61 in the circumferential direction are in contact with each other. In the present embodiment, the outer peripheral surface of the stator core main body 32a and the inner peripheral surface of the motor housing portion 61 contact each other at a plurality of locations (for example, four locations) with intervals in the circumferential direction. Therefore, the inner peripheral surface of the motor housing 61 is fitted to the outer peripheral surface of the stator core main body 32 a. According to the above structure, the stator 30 is fixed to the housing 6.

As shown in fig. 1, the coil assembly 33 has a plurality of coils 31 attached to a stator core 32. The plurality of coils 31 are attached to the respective teeth 32e of the stator core 32 via insulators not shown. The plurality of coils 31 are arranged in a circumferential direction. The plurality of coils 31 are arranged at equal intervals over the entire circumference in the circumferential direction. Although not shown in the drawings, the coil assembly 33 may have a binding member or the like that binds the coils 31, or may have a crossover wire that connects the coils 31 to each other.

The coil assembly 33 has a pair of coil ends 33a, 33b projecting from the stator core 32 in the axial direction. The coil end 33a is a portion of the coil block 33 that protrudes rightward (Y-side) from the stator core 32. The coil end 33b is a portion of the coil block 33 that protrudes to the left side (+ Y side) from the stator core 32. The coil end 33a includes a portion of each coil 31 included in the coil assembly 33 that protrudes to the right side of the stator core 32. The coil end 33b includes a portion of each coil 31 included in the coil assembly 33 that protrudes to the left side of the stator core 32. As shown in fig. 2, in the present embodiment, the coil ends 33a and 33b are annular around the motor axis J1. Although not shown, the coil ends 33a and 33b may include a binding member or the like for binding the coils 31, or may include a crossover wire for connecting the coils 31 to each other.

As shown in fig. 1, the rotor 20 is rotatably supported by bearings 26 and 27. The bearings 26, 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 housing 61 that covers the right side of the rotor 20 and the stator 30. The wall portion 61b constitutes a part of the wall portion of the housing 6, and closes the right opening of the motor housing portion 61.

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 61 c.

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

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

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

The torque output from the motor 2 is transmitted to the ring gear 51 of the differential device 5 via the shaft 21, the first gear 41, the second gear 42, the counter 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 appropriately changed according to a required reduction ratio. In the present embodiment, the reduction gear 4 is a parallel-axis gear type reduction gear in which the axes of the gears are arranged in parallel.

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

The refrigerant flow path 90 passes through the casing 6 and allows the refrigerant to flow therethrough. That is, the motor unit 1 is provided with a refrigerant flow path 90 through which the oil O circulates and which passes through the inside of the casing 6. The refrigerant flow path 90 is a path of the oil O that supplies the oil O from the oil reservoir P to the transmission device 3 and the motor 2 and is guided again to the oil reservoir P. The refrigerant flow path 90 is provided across the inside of the motor housing 61 and the inside of the gear housing 62.

In the present specification, the term "refrigerant flow path" refers to an oil path. The "refrigerant flow path" refers to the following concept: the oil supply device includes not only a "flow path" for forming a stable oil flow in one direction, but also a path for temporarily retaining oil and a path for dropping oil. The path for temporarily retaining oil includes, for example, a reservoir for storing oil.

The refrigerant flow path 90 includes a first refrigerant flow path 91 and a second refrigerant flow path 92. The first refrigerant flow path 91 and the second refrigerant flow path 92 circulate oil O inside the casing 6. The first refrigerant flow path 91 includes a stirring path 91a, a shaft supply path 91b, a shaft inner path 91c, and a rotor inner path 91 d. Further, an accumulator 93 is provided in the path of the first refrigerant flow path 91. The reservoir 93 is provided in the gear housing 62.

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

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

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

The oil O reaching the stator 30 absorbs heat from the stator 30. The oil O that has cooled the stator 30 drips downward and accumulates in the lower region inside the motor housing 61. The oil O accumulated in the lower region of the motor housing portion 61 moves to the gear housing portion 62 through the partition wall opening 68 provided in the partition wall 61 c. As described above, the first refrigerant flow path 91 supplies the oil O to the rotor 20 and the stator 30.

In the second refrigerant flow path 92, the oil O is drawn up from the oil reservoir P and supplied to the stator 30. The second refrigerant flow path 92 is provided with a pump 96, a cooler 97, and a refrigerant supply pipe unit 10. The second refrigerant flow path 92 has a first flow path 92a, a second flow path 92b, a third flow path 92c, a fourth flow path 94, a supply tube inner flow path 92d, a first discharge port 11c, and a second discharge port 12 c.

The first flow path 92a, the second flow path 92b, the third flow path 92c, and the fourth flow path 94 are provided in a wall portion of the casing 6. The first flow path 92a connects the oil reservoir P and the pump 96. The second flow path 92b connects the 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 a front side (+ X side) wall portion among the wall portions of the motor housing portion 61.

The fourth flow path 94 is provided in a wall portion of the motor housing portion 61 or the partition wall 61 c. The fourth flow path 94 is connected to the first supply pipe 11 and the second supply pipe 12 of the refrigerant supply pipe unit 10, which will be described later. That is, the fourth flow path 94 connects the third flow path 92c and the refrigerant supply pipe unit 10. The fourth flow channel 94 extends in the horizontal direction, for example, from a portion connected to the third flow channel 92c toward the rear side (-X side).

The refrigerant supply pipe unit 10 is disposed between the inner circumferential surface of the housing 6 and the outer circumferential surface of the stator 30. The refrigerant supplying tube unit 10 is located at an upper side of the stator 30. Specifically, the refrigerant supply pipe unit 10 is disposed between the top wall portion of the motor housing portion 61 and the upper end portion of the outer peripheral surface of the stator core main body 32 a. The left end (+ Y side) of the refrigerant supply pipe unit 10 is fixed to a wall portion or a partition wall 61c of the motor housing portion 61. The left end of the refrigerant supply tube unit 10 is connected to the fourth flow path 94. The end portion on the right side (-Y side) of the refrigerant supply tube unit 10 is fixed to the top wall portion or wall portion 61b of the motor housing portion 61. That is, the refrigerant supply pipe unit 10 is fixed to the housing 6.

The supply-pipe inner flow path 92d is a flow path of the refrigerant disposed inside the refrigerant supply pipe unit 10. That is, the supply in-pipe flow path 92d is located inside the refrigerant supply pipe unit 10. The in-pipe flow path 92d is provided to extend in the axial direction. The supply in-pipe flow path 92d is connected to the fourth flow path 94. As shown in fig. 2 to 5, the refrigerant supply tube unit 10 is provided with a plurality of supply tube inner flow paths 92d, and in the present embodiment, a pair of supply tube inner flow paths 92d are provided. The pair of supply pipe inner flow paths 92d are connected to the fourth flow path 94. The pair of supply in-pipe flow paths 92d are flow paths that branch off on the downstream side of the fourth flow path 94 in the second refrigerant flow path 92. According to the present embodiment, since a part of the refrigerant flow path 90 can be constituted by the refrigerant supply tube unit 10, the degree of freedom of the shape of the refrigerant flow path 90 can be increased, and the structure of the refrigerant flow path 90 can be simplified. One of the supply pipe inner flow paths 92d is connected to a first injection hole 11c that opens in a peripheral wall of the first supply pipe 11 described later. The other of the supply pipe inner flow paths 92d is connected to a second injection hole 12c that opens in the peripheral wall of the second supply pipe 12 described later. That is, the in-pipe flow path 92d is provided in connection with the first ejection hole 11c and the second ejection hole 12 c.

The first supply pipe 11 and the second supply pipe 12 are cylindrical and extend in the axial direction. In the present embodiment, the first supply pipe 11 and the second supply pipe 12 are cylindrical pipes linearly extending in the axial direction. The first supply pipe 11 and the second supply pipe 12 are arranged at a distance from each other in the front-rear direction. That is, the second supply pipe 12 is disposed at a distance from the first supply pipe 11. The first supply pipe 11 and the second supply pipe 12 are parallel to each other. As shown in fig. 4, the first supply pipe 11 and the second supply pipe 12 are located radially outside the stator 30. In the present embodiment, the radial position of the first supply pipe 11 and the radial position of the second supply pipe 12 are the same as each other. The first supply pipe 11 and the second supply pipe 12 are disposed above the stator core main body 32 a. The vertical position of the first supply pipe 11 and the vertical position of the second supply pipe 12 are the same as each other.

As shown in fig. 4, an upper fixing portion 32b is disposed between the first supply pipe 11 and the second supply pipe 12 when viewed from the axial direction. That is, when viewed from the axial direction, an imaginary straight line (not shown) passing through the central axis of the first supply pipe 11 and the central axis of the second supply pipe 12 intersects the upper fixing portion 32 b. The first supply pipe 11, the second supply pipe 12, and the upper fixing portion 32b overlap each other when viewed from the front-rear direction. The first supply pipe 11 and the second supply pipe 12 are disposed on both sides in the front-rear direction of the upper fixing portion 32 b. The first supply pipe 11 is located on the front side (+ X side) of the upper fixing portion 32b, and the second supply pipe 12 is located on the rear side (-X side) of the upper fixing portion 32 b. The first supply pipe 11 is positioned on one circumferential side θ 1 of the upper fixing portion 32b, and the second supply pipe 12 is positioned on the other circumferential side θ 2 of the upper fixing portion 32 b.

As shown in fig. 3, the upper fixing portion 32b is located between the first supply pipe 11 and the second supply pipe 12 when viewed from the radial direction. That is, the fixing portion 32b is disposed between the first supply pipe 11 and the second supply pipe 12 when viewed in the radial direction. The first supply pipe 11 extends along the direction in which the fixing portion 32b extends. The second supply pipe 12 extends along the direction in which the fixing portion 32b extends. According to the present embodiment, the refrigerant injected from the first supply pipe 11 and the refrigerant injected from the second supply pipe 12 can cool the stator 30 over a wide range in the axial direction, which is the direction in which the fixing portion 32b extends, on both sides of the upper fixing portion 32 b.

As shown in fig. 5, the first supply pipe 11 has: a first supply tube body portion 11 a; a small diameter portion 11b connected to an end portion on the left side (+ Y side) of the first supply tube main body portion 11 a; and a first injection hole 11c penetrating the peripheral wall of the first supply tube main body portion 11 a. That is, the first supply pipe 11 has the first injection holes 11c penetrating the peripheral wall of the first supply pipe 11.

The first supply pipe body portion 11a is cylindrical and extends in the axial direction. The small diameter portion 11b is cylindrical and extends in the axial direction. The outer diameter of the small diameter portion 11b is smaller than the outer diameter of the first supply pipe body portion 11 a. The small diameter portion 11b of the first supply pipe 11 is inserted from the right side (-Y side) into a hole (not shown) provided in the wall portion of the motor housing portion 61 or the partition wall 61c, and is attached to the wall portion of the motor housing portion 61 or the partition wall 61 c. The small diameter portion 11b opens to the left side (+ Y side). The small diameter portion 11b communicates with the fourth flow passage 94. Thereby, the supply pipe inner flow path 92d, which is the inside of the first supply pipe 11, is connected to the fourth flow path 94.

As shown in fig. 4, the first injection holes 11c extend in the pipe diameter direction perpendicular to the central axis of the first supply pipe 11, communicating the inside and outside of the first supply pipe 11. The first injection hole 11c is, for example, circular hole-shaped. The first injection hole 11c is located between the inner peripheral surface of the housing 6 and the outer peripheral surface of the stator 30. The first injection hole 11c injects the refrigerant, which is oil O, between the inner circumferential surface of the housing 6 and the outer circumferential surface of the stator 30. The first injection holes 11c inject the refrigerant at least to the outer peripheral surface of the stator 30. That is, the first supply pipe 11 injects the refrigerant at least to the outer peripheral surface of the stator 30. That is, the first supply pipe 11 injects the refrigerant. The first supply pipe 11 supplies the refrigerant to at least an upper end portion of the outer circumferential surface of the stator 30.

The first injection hole 11c is provided in plurality. At least one of the plurality of first injection holes 11c opens toward the circumferential direction. In the present embodiment, at least one of the plurality of first injection holes 11c opens to the other circumferential side θ 2, and at least another one opens to the one circumferential side θ 1. In addition, in the present specification, "the injection hole opens in the circumferential direction" means that the direction in which the injection hole opens includes a circumferential component. That is, the injection hole may be opened along the circumferential direction, or the injection hole may be opened in a direction inclined with respect to the circumferential direction.

As shown in fig. 5, the first injection holes 11c are provided in plurality at intervals in the axial direction (Y-axis direction). According to the present embodiment, the stator 30 can be cooled over a wide range in the axial direction by the oil O injected from the plurality of first injection holes 11c aligned in the axial direction. The first injection holes 11c are also provided in plurality at intervals in the circumferential direction. According to the present embodiment, the stator 30 can be cooled over a wide range in the circumferential direction by the oil O injected from the plurality of first injection holes 11c arranged in the circumferential direction.

The plurality of first injection holes 11c have a plurality of first stator core supply ports 13a and a plurality of first coil end supply ports 13 b. The oil O flowing in the first supply pipe 11 is injected from the first stator core supply port 13a and the first coil end supply port 13 b. The first stator core provision port 13a is open toward the other circumferential side θ 2 and the lower side (-Z side). At least one of the plurality of first coil end supply ports 13b is open to the other circumferential side θ 2 and the lower side, and at least another one is open to the one circumferential side θ 1 and the lower side.

The first stator core supply port 13a is provided in an intermediate portion between both end portions in the axial direction of the first supply pipe body portion 11 a. In the present embodiment, two or more first stator core supply ports 13a are provided at intervals in the axial direction in the middle portion of the first supply pipe body portion 11a in the axial direction. In the present embodiment, the first stator core supply opening 13a is open diagonally rearward to the lower side. The first stator core provision port 13a is located on the upper side of the stator core main body 32 a. The oil O injected from the first stator core supply port 13a is supplied to the stator core main body 32a from the upper side. That is, the first stator core supply port 13a among the plurality of first injection holes 11c supplies at least the oil O to the outer circumferential surface of the stator core 32.

The first coil end supply ports 13b are provided in plural numbers at both ends in the axial direction of the first supply pipe body portion 11 a. For example, three first coil end supply ports 13b are provided at both axial ends of the first supply pipe body portion 11 a. Three first coil end supply ports 13b disposed on the right side (-Y side) among the plurality of first coil end supply ports 13b are located on the upper side of the coil end 33a (refer to fig. 3). Three first coil end supply ports 13b provided on the left side (+ Y side) among the plurality of first coil end supply ports 13b are located on the upper side of the coil end 33 b. The oil O injected from the first coil end supply port 13b is supplied from the upper side to the coil ends 33a, 33 b. That is, the first coil end supply port 13b of the plurality of first injection holes 11c supplies the oil O to at least the outer peripheral surfaces of the coil ends 33a, 33 b.

As shown in fig. 4 and 5, the plurality of first injection holes 11c have a plurality of first inner supply ports 15a and a plurality of first outer supply ports 15 b. The oil O flowing in the first supply pipe 11 is ejected from the first inner supply port 15a and the first outer supply port 15 b. The first inner side supply port 15a is open to the other circumferential side θ 2 and the lower side. The first inner supply port 15a is an injection hole that injects the oil O toward the other circumferential side θ 2 among the plurality of first injection holes 11 c. In the present embodiment, the first inner supply ports 15a are disposed at both ends and at a middle portion in the axial direction of the first supply pipe body portion 11a, respectively. The plurality of first inner side supply ports 15a have at least one first stator core supply port 13a and at least one first coil end supply port 13 b.

The first outer supply port 15b opens toward the circumferential side θ 1 and toward the lower side. The first outer supply port 15b is an injection hole that injects the oil O toward the one circumferential side θ 1 among the plurality of first injection holes 11 c. In the present embodiment, the first outer supply ports 15b are disposed at both axial ends of the first supply pipe body portion 11 a. The plurality of first outside supply ports 15b have at least one first coil end supply port 13 b.

As shown in fig. 5, the second supply pipe 12 has: the second supply tube body portion 12 a; a small diameter portion 12b connected to an end portion on the left side (+ Y side) of the second supply tube main body portion 12 a; and a second injection hole 12c penetrating the peripheral wall of the second supply tube main body portion 12 a. That is, the second supply pipe 12 has the second injection holes 12c penetrating the peripheral wall of the second supply pipe 12.

The second supply tube body portion 12a is cylindrical and extends in the axial direction. The small diameter portion 12b is cylindrical and extends in the axial direction. The outer diameter of the small diameter portion 12b is smaller than the outer diameter of the second supply pipe body portion 12 a. The small diameter portion 12b of the second supply pipe 12 is inserted from the right side (-Y side) into a hole (not shown) provided in the wall portion or the partition wall 61c of the motor housing portion 61, and is attached to the wall portion or the partition wall 61c of the motor housing portion 61. The small diameter portion 12b opens to the left side (+ Y side). The small diameter portion 12b communicates with the fourth flow passage 94. Thereby, the supply pipe inner flow path 92d, which is the inside of the second supply pipe 12, is connected to the fourth flow path 94.

As shown in fig. 4, the second injection holes 12c extend in the pipe diameter direction perpendicular to the central axis of the second supply pipe 12, communicating the inside and outside of the second supply pipe 12. The second injection hole 12c is, for example, circular hole-shaped. The second injection holes 12c are located between the inner peripheral surface of the housing 6 and the outer peripheral surface of the stator 30. The second injection hole 12c injects the refrigerant, which is oil O, between the inner circumferential surface of the housing 6 and the outer circumferential surface of the stator 30. The second injection holes 12c inject the refrigerant at least to the outer peripheral surface of the stator 30. That is, the second supply pipe 12 injects the refrigerant at least to the outer peripheral surface of the stator 30. That is, the second supply pipe 12 injects the refrigerant. The second supply pipe 12 supplies the refrigerant to at least an upper end portion of the outer circumferential surface of the stator 30.

The second injection hole 12c is provided in plurality. At least one of the plurality of second injection holes 12c opens toward the circumferential direction. In the present embodiment, at least one of the plurality of second injection holes 12c opens to one circumferential side θ 1, and at least another one opens to the other circumferential side θ 2.

As shown in fig. 5, the second injection holes 12c are provided in plurality at intervals in the axial direction (Y-axis direction). According to the present embodiment, the stator 30 can be cooled over a wide range in the axial direction by the oil O injected from the plurality of second injection holes 12c aligned in the axial direction. In addition, the second injection holes 12c are also provided in plurality at intervals in the circumferential direction. According to the present embodiment, the stator 30 can be cooled over a wide range in the circumferential direction by the oil O injected from the plurality of second injection holes 12c arranged in the circumferential direction.

The plurality of second injection holes 12c have a plurality of second stator core supply ports 14a and a plurality of second coil end supply ports 14 b. The oil O flowing in the second supply pipe 12 is injected from the second stator core supply port 14a and the second coil end supply port 14 b. The second stator core provision port 14a is open toward the circumferential direction side θ 1 and the lower side (-Z side). At least one of the plurality of second coil end supply ports 14b is open to one circumferential side θ 1 and the lower side, and at least another one is open to the other circumferential side θ 2 and the lower side.

The second stator core supply port 14a is provided in an intermediate portion between both end portions in the axial direction of the second supply pipe body portion 12 a. In the present embodiment, two or more second stator core supply ports 14a are provided at intervals in the axial direction in the middle portion of the second supply pipe body portion 12a in the axial direction. In the present embodiment, the second stator core supply opening 14a is open diagonally forward to the lower side. The second stator core provision port 14a is located on the upper side of the stator core main body 32 a. The oil O injected from the second stator core supply port 14a is supplied to the stator core main body 32a from the upper side. That is, the second stator core supply port 14a among the plurality of second injection holes 12c supplies at least the oil O to the outer circumferential surface of the stator core 32.

The second coil end supply ports 14b are provided in plural numbers at both ends in the axial direction of the second supply tube main body portion 12 a. For example, three second coil end supply ports 14b are provided at both axial ends of the second supply tube body portion 12 a. Three second coil end supply ports 14b provided on the right side (-Y side) among the plurality of second coil end supply ports 14b are located on the upper side of the coil end 33a (refer to fig. 3). Three second coil end supply ports 14b provided on the left side (+ Y side) among the plurality of second coil end supply ports 14b are located on the upper side of the coil end 33 b. The oil O injected from the second coil end supply port 14b is supplied from the upper side to the coil ends 33a, 33 b. That is, the second coil end supply port 14b of the plurality of second injection holes 12c supplies the oil O to at least the outer peripheral surfaces of the coil ends 33a, 33 b.

As shown in fig. 4 and 5, the plurality of second injection holes 12c have a plurality of second inside supply ports 16a and a plurality of second outside supply ports 16 b. The oil O flowing in the second supply pipe 12 is injected from the second inside supply port 16a and the second outside supply port 16 b. The second inner side supply port 16a is open to the circumferential one side θ 1 and the lower side. The second inner supply port 16a is an injection hole that injects the oil O toward the one circumferential side θ 1 among the plurality of second injection holes 12 c. In the present embodiment, the second inner supply ports 16a are disposed at both ends and at a middle portion in the axial direction of the second supply tube main body portion 12a, respectively. The plurality of second inner side supply ports 16a have at least one second stator core supply port 14a and at least one second coil end supply port 14 b.

The second outside provision port 16b is open to the other circumferential side θ 2 and the lower side. The second outside supply port 16b is an injection hole that injects the oil O toward the other circumferential side θ 2 among the plurality of second injection holes 12 c. In the present embodiment, the second outside supply ports 16b are respectively disposed at both axial ends of the second supply pipe body portion 12 a. The plurality of second outside supply ports 16b have at least one second coil end supply port 14 b.

As shown in fig. 4, the distance between the first inner provision port 15a and the upper fixing portion 32b and the distance between the second inner provision port 16a and the upper fixing portion 32b are the same as each other. In addition, the distance between the first outside supply port 15b and the upper fixing portion 32b and the distance between the second outside supply port 16b and the upper fixing portion 32b are the same as each other. That is, the distance between the first injection hole 11c and the fixing portion 32b and the distance between the second injection hole 12c and the fixing portion 32b are the same as each other. According to the present embodiment, the cooling effect of the refrigerant injected from the first injection hole 11c and the cooling effect of the refrigerant injected from the second injection hole 12c are suppressed from being unequal on both sides of the fixing portion 32 b. That is, the cooling effect of the first supply pipe 11 and the cooling effect of the second supply pipe 12 are the same as each other on both sides of the fixing portion 32 b. Therefore, the stator 30 can be uniformly cooled.

As shown in fig. 4, the center line C3 of the through hole 32C corresponds to the center of the fixing portion 32 b. In the present embodiment, a first angle α 1 between an imaginary straight line VL passing through the center of the upper fixing portion 32b and the motor axis J1 and the center line C1 of the first inner supply port 15a and a second angle α 2 between the imaginary straight line VL and the center line C2 of the second inner supply port 16a are identical to each other when viewed from the axial direction. In addition, although not particularly illustrated, a first angle between the imaginary straight line VL and the center line of the first outer supply port 15b and a second angle between the imaginary straight line VL and the center line of the second outer supply port 16b are the same as each other when viewed from the axial direction. That is, a first angle α 1 between the imaginary straight line VL and the center line C1 of the first injection hole 11C and a second angle α 2 between the imaginary straight line VL and the center line C2 of the second injection hole 12C are the same as each other when viewed from the axial direction. According to the present embodiment, the cooling effect of the refrigerant injected from the first injection hole 11c and the cooling effect of the refrigerant injected from the second injection hole 12c are suppressed from being unequal on both sides of the fixing portion 32 b. That is, the cooling effect of the first supply pipe 11 and the cooling effect of the second supply pipe 12 are the same as each other on both sides of the fixing portion 32 b. Therefore, the stator 30 can be uniformly cooled.

The coupling portion 19 couples the first supply pipe 11 and the second supply pipe 12. As shown in fig. 3, the upper fixing portion 32b does not overlap the coupling portion 19 when viewed in the radial direction. That is, the fixing portion 32b does not overlap the coupling portion 19 when viewed in the radial direction. That is, the fixing portion 32b is disposed at a predetermined interval in a direction perpendicular to the radial direction with respect to the coupling portion 19 when viewed in the radial direction. In the present embodiment, the fixing portion 32b is disposed at a distance from the coupling portion 19 in the Y direction, which is the axial direction of the rotor 20, when viewed in the radial direction. As shown in fig. 4, the upper fixing portion 32b overlaps the coupling portion 19 when viewed from the axial direction.

According to the present embodiment, since the first supply pipe 11 and the second supply pipe 12 are coupled by the coupling portion 19, the relative positional accuracy of the first supply pipe 11 and the second supply pipe 12 can be ensured, and the first supply pipe 11, the second supply pipe 12, and the coupling portion 19 can be easily attached to the housing 6. In the present embodiment, as shown in fig. 3, since the fixing portion 32b does not overlap the coupling portion 19 when viewed in the radial direction, the coupling portion 19 can be disposed close to the outer peripheral surface of the stator 30 except for the fixing portion 32 b. In the present embodiment, the connection portion 19 is disposed above the coil end 33a and in proximity to the coil end 33 a. The first supply pipe 11 and the second supply pipe 12 may be disposed close to the outer peripheral surface of the stator 30 except for the fixing portion 32 b. In the present embodiment, the first supply pipe 11 and the second supply pipe 12 are disposed above the stator core main body 32a in proximity to the stator core main body 32 a. This makes it possible to reduce the outer shape (particularly, the outer shape in the radial direction, in the vertical direction in the present embodiment) of the motor unit 1, and to configure the motor unit 1 compactly. Since the refrigerant injected from the first supply pipe 11 and the second supply pipe 12 is efficiently supplied to the stator 30, the cooling efficiency of the stator 30 can be improved. In addition, the degree of freedom in the positions where the first supply pipe 11 and the second supply pipe 12 can be arranged in the housing 6 is increased, that is, the degree of freedom in design is improved, and various requirements for the motor unit 1 can be satisfied. Further, since the first supply pipe 11 and the second supply pipe 12 are disposed on both sides of the fixing portion 32b, the refrigerant can be supplied to both sides of the fixing portion 32b, and the stator 30 can be cooled equally on both sides of the fixing portion 32 b.

The coupling portion 19 is connected to an axial end portion of the first supply pipe 11 and an axial end portion of the second supply pipe 12. That is, the coupling portion 19 is connected to the end of the first supply pipe 11 and the end of the second supply pipe 12. The connection portion 19 is fixed to a ceiling wall portion of the motor housing portion 61. According to the present embodiment, since the coupling portion 19 couples the end portion of the first supply pipe 11 and the end portion of the second supply pipe 12, the coupling portion 19 and the fixing portion 32b are easily arranged in a shifted manner when viewed in the radial direction. Both end portions of the first supply pipe 11 are supported by the coupling portion 19 and the housing 6 in a double-supported state, and both end portions of the second supply pipe 12 are supported by the coupling portion 19 and the housing 6 in a double-supported state. Therefore, the mounting postures of the first supply pipe 11 and the second supply pipe 12 in the housing 6 are stabilized. In addition, the refrigerant injected from the first supply pipe 11 and the second supply pipe 12 is not easily blocked by the coupling portion 19. The refrigerant can be injected in a wide range from each of the first supply pipe 11 and the second supply pipe 12, and the cooling efficiency of the stator 30 can be improved. Further, the refrigerant injected from the first supply pipe 11 and the second supply pipe 12 can be supplied not only to the outer peripheral surface of the stator 30 but also to, for example, the bearing 26 of the wall portion 61 b.

The coupling portion 19 is coupled to an end portion on the right side (Y side), which is different from the end portion where the small diameter portion 11b is located, of both end portions of the first supply pipe 11 in the axial direction, and closes the end portion on the right side of the first supply pipe 11. The coupling portion 19 is connected to the end portion of the second supply pipe 12 on the other side, that is, the right-hand end portion, of the two axial end portions, which is different from the end portion where the small-diameter portion 12b is located, and closes the right-hand end portion of the second supply pipe 12. That is, the connection portion 19 is connected to the downstream end of the two ends of the first supply pipe 11, and is connected to the downstream end of the two ends of the second supply pipe 12. According to the present embodiment, the downstream ends of the first supply pipe 11 and the second supply pipe 12 can be supported by the connection portion 19, and the downstream ends can be closed. In contrast to the present embodiment, for example, in the case where a coupling member for coupling the first supply pipe and the second supply pipe, a plug member for closing the downstream end of the first supply pipe, and a plug member for closing the downstream end of the second supply pipe are separately provided, the present embodiment reduces the number of components, simplifies the structure, and facilitates assembly. In the present embodiment, since the upstream end portions of the first supply pipe 11 and the second supply pipe 12, that is, the small diameter portions 11b and 12b, are inserted into holes (not shown) provided in the wall portion of the motor housing portion 61 or the partition wall 61c, the downstream end portions of the first supply pipe 11 and the second supply pipe 12 are supported by the connecting portion 19, and the first supply pipe 11 and the second supply pipe 12 are supported in a double-supported state. Therefore, the first supply pipe 11 and the second supply pipe 12 are easily attached to the housing 6.

As shown in fig. 2 to 5, the coupling portion 19 has a plate shape. The coupling portion 19 extends in the front-rear direction (X-axis direction). The coupling portion 19 includes a coupling body 19a, a mounting fixing portion 19b, a coupling stepped portion 19c, and a mounting hole 19 d. The connecting body 19a has a rectangular plate shape, and the pair of plate surfaces face in the axial direction. Specifically, the coupling body 19a has a rectangular plate shape extending in the front-rear direction. The coupling body 19a is connected to the downstream end portion (-Y side) of the first supply pipe 11 and the downstream end portion of the second supply pipe 12. The coupling body 19a closes the downstream end of the first supply pipe 11 and the downstream end of the second supply pipe 12.

The fixing portion 19b has a rectangular plate shape, and the pair of plate surfaces face in the axial direction. The attachment fixing portion 19b is located on the left side (+ Y side) of the coupling body 19 a. The attachment fixing portion 19b is connected to an end portion of the coupling body 19a in the front-rear direction via a coupling stepped portion 19 c. The plurality of mounting and fixing portions 19b are provided, and a pair is provided in the present embodiment. The pair of attachment fixing portions 19b are disposed apart from each other in the front-rear direction. The pair of attachment fixing portions 19b are located on both sides of the coupling body 19a in the front-rear direction. The pair of attachment fixing portions 19b are fixed to the top wall portion of the motor housing portion 61, respectively. That is, the attachment fixing portion 19b is fixed to the housing 6. In contrast to the case where the attachment fixing portion is provided at a portion different from the coupling portion, for example, unlike the present embodiment, in the present embodiment, the coupling portion 19 that connects the first supply pipe 11 and the second supply pipe 12 has the attachment fixing portion 19b, and therefore the structure can be simplified.

The coupling stepped portion 19c couples the end portion in the front-rear direction of the coupling body 19a and the end portion in the front-rear direction of the attachment fixing portion 19 b. The coupling stepped portion 19c has a rectangular plate shape, and the pair of plate surfaces face in a direction perpendicular to the motor axis J1. A plurality of coupling step portions 19c are provided, and a pair of coupling step portions are provided in the present embodiment. The pair of coupling step portions 19c are connected to both ends of the coupling body 19a in the front-rear direction. One of the pair of coupling step portions 19c couples an end portion on the front side (+ X side) of the coupling body 19a and an end portion on the rear side (-X side) of one of the pair of attachment fixing portions 19b located on the front side. The other of the pair of coupling step portions 19c couples the rear end of the coupling body 19a and the front end of the other of the pair of attachment fixing portions 19b located on the rear side. According to the present embodiment, the rigidity of the periphery of the attachment fixing portion 19b fixed to the housing 6 can be improved by the coupling stepped portion 19 c.

The mounting hole 19d is disposed in the mounting fixing portion 19 b. The mounting hole 19d penetrates the mounting fixing portion 19b in the axial direction. The mounting hole 19d is, for example, a circular hole and opens on a pair of plate surfaces of the mounting fixing portion 19 b. A plurality of mounting holes 19d are provided, and a pair of mounting holes are provided in the present embodiment. A bolt not shown is inserted through each mounting hole 19d from the right side (Y side). The refrigerant supply pipe unit 10 is fixed to the casing 6 by screwing the bolts inserted into the respective mounting holes 19d into the female screw holes, not shown, in the top wall portion of the motor housing portion 61.

The rib 25 extends at least over the outer surface of the coupling portion 19. The rib 25 projects from at least the outer surface of the coupling portion 19 and extends along the outer surface of the coupling portion 19. The first providing pipe 11, the second providing pipe 12, the coupling portion 19, and the rib 25 in the refrigerant providing pipe unit 10 are portions of a single member. That is, in the present embodiment, the first supply pipe 11, the second supply pipe 12, and the connection portion 19 are formed of a single member. Compared to the case where the first supply pipe, the second supply pipe, and the coupling portion are formed of different members, for example, which is different from the present embodiment, according to the present embodiment, the number of members can be reduced, and the work step of assembling the first supply pipe 11, the second supply pipe 12, and the coupling portion 19 can be reduced. In addition, since the relative positional accuracy of the first supply pipe 11 and the second supply pipe 12 is stably ensured, the refrigerant supply pipe unit 10 is easily assembled to the housing 6. The connecting portion 19 that connects the first supply pipe 11 and the second supply pipe 12 is a portion where stress is likely to concentrate, for example, when the refrigerant supply pipe unit 10 is assembled to the motor unit 1. Further, in the case where the coupling portion 19 has the attachment fixing portion 19b fixed to the housing 6 as in the present embodiment, stress is likely to concentrate on the coupling portion 19 when the refrigerant supply pipe unit 10 is assembled to the motor unit 1. According to the present embodiment, since at least the rib 25 is provided on the coupling portion 19, the rigidity of the coupling portion 19 is improved. Thus, the rigidity of the refrigerant supplying pipe unit 10 is ensured. Further, according to the present embodiment, the structure can be simplified as compared with a case where the fixing portion is provided at a portion different from the coupling portion, for example, unlike the present embodiment.

The first supply pipe 11, the second supply pipe 12, the coupling portion 19, and the rib 25 are made of resin. According to the present embodiment, the degree of freedom of the shape of each of the first supply tube 11, the second supply tube 12, the coupling portion 19, and the rib 25 is increased, and various requirements for the refrigerant supply tube unit 10 can be satisfied. In addition, in the case where the first supply pipe 11, the second supply pipe 12, the coupling portion 19, and the ribs 25 are made of resin, the coupling portion 19 may be easily deformed due to so-called "resin shrinkage" after resin molding, but according to the present embodiment, since the ribs 25 are provided on the coupling portion 19, resin shrinkage is suppressed, and deformation of the coupling portion 19 is suppressed.

The rib 25 includes a coupling rib 25a, a first fixing rib 25b, a second fixing rib 25c, a first intermediate rib 25d, and a second intermediate rib 25 e. The coupling rib 25a extends on the outer peripheral surface of the first supply pipe 11, on the outer surface of the coupling portion 19, and on the outer peripheral surface of the second supply pipe 12. Specifically, the coupling rib portion 25a continuously extends over a portion of the outer peripheral surface of the first supply pipe body portion 11a that faces the rear side (-X side), a plate surface of the coupling body 19a that faces the left side (+ Y side), and a portion of the outer peripheral surface of the second supply pipe body portion 12a that faces the front side (+ X side). According to the present embodiment, since the coupling ribs 25a are provided on the first supply pipe 11, the coupling portion 19, and the second supply pipe 12, the rigidity of each of the first supply pipe 11, the coupling portion 19, and the second supply pipe 12 can be improved. Further, since the coupling ribs 25a extend over the first supply pipe 11, the coupling portion 19, and the second supply pipe 12 and couple the first supply pipe 11, the coupling portion 19, and the second supply pipe 12 to each other, the rigidity of the entire refrigerant supply pipe unit 10 can be improved.

As shown in fig. 5, the coupling rib 25a includes a first coupling rib 25f, a second coupling rib 25g, and a third coupling rib 25 h. The first coupling rib portion 25f extends in the axial direction on the outer peripheral surface of the first supply pipe body portion 11 a. That is, the first coupling rib 25f extends on the outer circumferential surface of the first supply pipe 11. The first coupling rib portion 25f is disposed in the right side (-Y side) portion of the outer peripheral surface of the first supply tube main body portion 11 a. The first coupling rib portion 25f is disposed in a portion of the outer peripheral surface of the first supply pipe body portion 11a that faces the rear side (-X side).

The second linking rib 25g extends in the axial direction on the outer peripheral surface of the second supply pipe body portion 12 a. That is, the second coupling rib 25g extends on the outer circumferential surface of the second supply pipe 12. The second linking rib 25g is disposed on the right side portion of the outer peripheral surface of the second supply pipe body portion 12 a. The second coupling rib portion 25g is disposed on a portion of the outer peripheral surface of the second supply pipe body portion 12a that faces the front side (+ X side).

The third coupling rib 25h extends in the front-rear direction (X-axis direction) on the plate surface facing the left side (+ Y side) of the coupling body 19 a. That is, the third coupling rib 25h extends on the outer surface of the coupling portion 19. Both longitudinal ends of the third linking rib portion 25h are connected to the right side (-Y side) end of the first linking rib portion 25f and the right side end of the second linking rib portion 25 g.

The amount of projection of the first coupling rib 25f from the outer peripheral surface of the first supply pipe 11 becomes smaller as it goes away from the coupling portion 19. That is, the amount of projection of the first coupling rib portion 25f from the outer peripheral surface of the first supply pipe body portion 11a becomes smaller as it goes farther to the left side in the axial direction from the coupling body 19 a. The amount of projection of the second linking rib 25g from the outer peripheral surface of the second supply pipe 12 becomes smaller as it goes away from the linking portion 19. That is, the amount of projection of the second coupling rib portion 25g from the outer peripheral surface of the second supply pipe body portion 12a becomes smaller as it goes farther to the left side in the axial direction from the coupling body 19 a. The amount of projection of the third linking rib 25h from the outer surface of the linking portion 19 is kept constant along the direction in which the third linking rib 25h extends. That is, the amount of projection of the third coupling rib 25h from the plate surface of the coupling body 19a toward the left side is kept constant in the front-rear direction. In other words, the third coupling rib 25h has a portion in which the amount of projection in the axial direction from the plate surface of the coupling body 19a facing the left side (i.e., the outer surface of the coupling portion 19) is constant in the front-rear direction. According to the present embodiment, the third coupling rib 25h can stably increase the rigidity of the coupling portion 19, and can suppress excessive rigidity of the first supply pipe 11 and the second supply pipe 12, thereby reducing the amount of material used for the coupling rib 25 a.

As shown in fig. 2 to 5, the first fixing rib 25b extends in the axial direction on the outer peripheral surface of the first supply pipe body portion 11 a. The right side (-Y side) end of the first fixing rib portion 25b is connected to the mounting fixing portion 19 b. That is, the first fixing rib 25b extends on the outer circumferential surface of the first supply pipe 11 and is connected to the attachment fixing portion 19 b. The first fixing rib 25b is disposed in a right portion of the outer peripheral surface of the first supply pipe body portion 11 a. The first fixing rib portion 25b is disposed at a portion facing the front side (+ X side) of the outer peripheral surface of the first supply pipe body portion 11 a. The amount of projection of the first fixing rib 25b from the outer peripheral surface of the first supply pipe 11 becomes smaller as it goes away from the connection portion 19. That is, the amount of projection of the first fixing rib portion 25b from the outer peripheral surface of the first supply pipe body portion 11a becomes smaller as it becomes farther to the left side (+ Y side) in the axial direction from the attachment fixing portion 19 b. The periphery of the attachment fixing portion 19b of the coupling portion 19 is likely to be subjected to stress concentration when fixed to the housing 6. According to the present embodiment, the rigidity of the periphery of the attachment fixing portion 19b can be increased by the first fixing rib portion 25 b.

The second fixing rib portion 25c extends in the axial direction on the outer peripheral surface of the second supply tube main body portion 12 a. The right end of the second fixing rib 25c is connected to the attachment fixing portion 19 b. That is, the second fixing rib 25c extends on the outer circumferential surface of the second supply pipe 12 and is connected to the attachment fixing portion 19 b. The second fixing rib 25c is disposed in the right portion of the outer peripheral surface of the second supply pipe body portion 12 a. The second fixing rib portion 25c is disposed in a portion of the outer peripheral surface of the second supply tube main body portion 12a that faces the rear side (-X side). The amount of projection of the second fixing rib 25c from the outer peripheral surface of the second supply pipe 12 becomes smaller as it goes away from the connection portion 19. That is, the amount of projection of the second fixing rib portion 25c from the outer peripheral surface of the second supply pipe body portion 12a becomes smaller as it goes farther to the left side in the axial direction from the attachment fixing portion 19 b. The periphery of the attachment fixing portion 19b of the coupling portion 19 is likely to be subjected to stress concentration when fixed to the housing 6. According to the present embodiment, the rigidity of the periphery of the attachment fixing portion 19b can be improved by the second fixing rib portion 25 c.

As shown in fig. 2 to 4, the first intermediate rib portion 25d extends in the axial direction on the outer peripheral surface of the first supply pipe body portion 11 a. The right-side (-Y-side) end of the first intermediate rib 25d is connected to the connecting body 19 a. That is, the first intermediate rib 25d extends on the outer peripheral surface of the first supply pipe 11 and is connected to the connection portion 19. The first intermediate rib 25d is disposed in the right portion of the outer peripheral surface of the first supply pipe body portion 11 a. The first intermediate rib 25d is disposed in a portion of the outer peripheral surface of the first supply pipe body portion 11a that faces upward (+ Z side). The first intermediate rib 25d is located between the coupling rib 25a and the first fixing rib 25b in the direction around the central axis of the first supply pipe 11. According to the present embodiment, the rigidity of the connection portion 19 and the first supply pipe 11 can be further improved by the first intermediate rib 25 d. The amount of projection of the first intermediate rib 25d from the outer peripheral surface of the first supply pipe 11 decreases as the distance from the connection portion 19 increases. That is, the amount of projection of the first intermediate rib portion 25d from the outer peripheral surface of the first supply pipe body portion 11a becomes smaller as it becomes farther to the left side (+ Y side) from the coupling body 19a in the axial direction. The amount of projection of the first intermediate rib 25d from the outer peripheral surface of the first supply pipe 11 is smaller than the amount of projection of the coupling rib 25a from the outer peripheral surface of the first supply pipe 11 and the amount of projection of the first fixing rib 25b from the outer peripheral surface of the first supply pipe 11.

The second intermediate rib portion 25e extends in the axial direction on the outer peripheral surface of the second supply pipe body portion 12 a. The right end of the second intermediate rib 25e is connected to the connecting body 19 a. That is, the second intermediate rib 25e extends on the outer peripheral surface of the second supply pipe 12 and is connected to the connection portion 19. The second intermediate rib 25e is disposed in the right portion of the outer peripheral surface of the second supply pipe body portion 12 a. The second intermediate rib 25e is disposed in an upward facing portion of the outer peripheral surface of the second supply pipe body portion 12 a. The second intermediate rib 25e is located between the coupling rib 25a and the second fixing rib 25c in the direction around the central axis of the second supply pipe 12. According to the present embodiment, the rigidity of the connection portion 19 and the second supply pipe 12 can be further improved by the second intermediate rib 25 e. The amount of projection of the second intermediate rib 25e from the outer peripheral surface of the second supply pipe 12 becomes smaller as it goes away from the connection portion 19. That is, the amount of projection of the second intermediate rib portion 25e from the outer peripheral surface of the second supply pipe body portion 12a becomes smaller as it goes farther to the left side in the axial direction from the connecting body 19 a. The amount of projection of the second intermediate rib 25e from the outer circumferential surface of the second supply pipe 12 is smaller than the amount of projection of the coupling rib 25a from the outer circumferential surface of the second supply pipe 12 and the amount of projection of the second fixing rib 25c from the outer circumferential surface of the second supply pipe 12.

As shown in fig. 3 and 5, the first elastic ring member 28 is an elastically deformable annular member, such as an O-ring. The first elastic ring member 28 is fitted to the outer peripheral surface of the small diameter portion 11b of the first supply pipe 11. That is, the first elastic ring member 28 is fitted on the outer peripheral surface of the end (i.e., the upstream end) of the first supply pipe 11 that is different from the end connected to the connection portion 19. According to the present embodiment, the first elastic ring member 28 is disposed between the upstream end of the first supply pipe 11 and a wall portion of the motor housing portion 61 or a hole portion (not shown) of the partition wall 61 c. This ensures the sealing property between the hole and the upstream end of the first supply pipe 11, and efficiently supplies the refrigerant from the first supply pipe 11 to the outer peripheral surface of the stator 30. Further, since the vibration-proof function can be obtained by the first elastic ring member 28, the generation of noise and the like between the first supply pipe 11 and the hole portion due to vibration is suppressed.

The second elastic ring member 29 is an elastically deformable annular member, and is, for example, an O-ring or the like. The second elastic ring member 29 is fitted to the outer peripheral surface of the small diameter portion 12b of the second supply pipe 12. That is, the second elastic ring member 29 is fitted to the outer peripheral surface of the end (i.e., the upstream end) of the second supply pipe 12 that is different from the end connected to the connection portion 19. According to the present embodiment, the second elastic ring member 29 is disposed between the upstream end of the second supply pipe 12 and a wall portion of the motor housing portion 61 or a hole portion (not shown) of the partition wall 61 c. This ensures the sealing property between the hole and the upstream end of the second supply pipe 12, and efficiently supplies the refrigerant from the second supply pipe 12 to the outer peripheral surface of the stator 30. Further, since the vibration-proof function can be obtained by the second elastic ring member 29, the generation of noise and the like between the second supply pipe 12 and the hole portion due to vibration is suppressed.

As shown in fig. 1, the pump 96 is provided on a wall portion of the housing 6. The pump 96 is an oil pump that feeds oil O as the refrigerant. In the present embodiment, the pump 96 is an electric pump driven by electric power. The pump 96 sucks the oil O from the oil reservoir P through the first flow path 92a, and supplies the oil O to the motor 2 through the second flow path 92b, the cooler 97, the third flow path 92c, the fourth flow path 94, the supply pipe inner flow path 92d, the first injection hole 11c, and the second injection hole 12 c. That is, the pump 96 sends the oil O contained in the casing 6 to the fourth flow path 94, the supply tube inner flow path 92d, the first injection hole 11c, and the second injection hole 12 c.

The oil O delivered to the fourth flow path 94 by the pump 96 branches off and flows into the pair of supply pipe internal flow paths 92 d. That is, the oil O flowing into the fourth flow path 94 flows into the first supply pipe 11 from the left side (+ Y side) end of the first supply pipe 11. The oil O flowing into the first supply pipe 11 flows to the right side (-Y side) in the first supply pipe 11, and is supplied to the stator 30 from the plurality of first injection holes 11 c. The oil O flowing into the fourth flow path 94 flows into the second supply pipe 12 from the left end of the second supply pipe 12. The oil O flowing into the second supply pipe 12 flows to the right side in the second supply pipe 12 and is supplied to the stator 30 from the plurality of second injection holes 12 c.

The oil O supplied from the first supply pipe 11 and the second supply pipe 12 to the stator 30 drops downward and is accumulated in a lower region in the motor housing 61. The oil O accumulated in the lower region of the motor housing portion 61 moves to the oil reservoir P of the gear housing portion 62 through the partition wall opening 68 provided in the partition wall 61 c. As described above, the second refrigerant flow path 92 supplies the oil O to the stator 30.

As shown in fig. 1, the cooler 97 is provided in a wall portion of the casing 6. The cooler 97 cools the oil O passing through the second refrigerant flow path 92. That is, the cooler 97 is an oil cooler. The cooler 97 is connected to the second flow path 92b and the third flow path 92 c. The second flow path 92b and the third flow path 92c are connected to each other via an internal flow path of the cooler 97. A cooling water pipe 98 for passing cooling water cooled by a radiator, not shown, is connected to the cooler 97. The oil O passing through the cooler 97 is cooled by heat exchange with the cooling water passing through the cooling water pipe 98.

The present invention is not limited to the above-described embodiments, and for example, as described below, structural changes and the like can be made without departing from the scope of the present invention.

Fig. 6 schematically shows the stator 30 and the refrigerant supply tube unit 10 of modification 1 of the above embodiment. In modification 1, the first supply pipe 11, the second supply pipe 12, and the connection portion 19 are disposed above the stator 30. The first supply pipe 11 and the second supply pipe 12 extend in a direction perpendicular to the motor axis J1, specifically, in the front-rear direction (X-axis direction), respectively. The first supply tube 11 is located above the coil end 33a, and the second supply tube 12 is located above the coil end 33 b. The coupling portion 19 extends in the axial direction and couples the first supply pipe 11 and the second supply pipe 12. The coupling portion 19 is located above the stator core main body 32a, the coil end 33a, and the coil end 33 b. As shown in fig. 6, the fixing portions 32b are disposed between the first supply pipe 11 and the second supply pipe 12 when viewed in the radial direction, and are disposed at intervals in the X direction perpendicular to the axial direction of the rotor 20 with respect to the connection portion 19. That is, the fixing portion 32b is disposed between the first supply pipe 11 and the second supply pipe 12 and does not overlap the coupling portion 19 when viewed in the radial direction. In modification 1, the same operational effects as those of the above embodiment can be obtained. In addition, according to modification 1, particularly the coil ends 33a and 33b of the stator 30 can be efficiently cooled.

Fig. 7 schematically shows the stator 30 and the refrigerant supply tube unit 10 of modification 2 of the above embodiment. In modification 2, the fixing portion 32b is disposed at a middle portion between both end portions of the stator core 32 in the axial direction, and extends in the axial direction. The coupling portion 19 is provided in plural. The plurality of coupling portions 19 are arranged at intervals in the axial direction. Each of the coupling portions 19 couples the first supply pipe 11 and the second supply pipe 12. As shown in fig. 7, the fixing portion 32b is disposed between the first supply pipe 11 and the second supply pipe 12 when viewed in the radial direction, and is disposed at a distance from the coupling portion 19 in the Y direction, which is the axial direction of the rotor 20. That is, the fixing portion 32b is disposed between the first supply pipe 11 and the second supply pipe 12 and does not overlap the coupling portion 19 when viewed in the radial direction. In modification 2, the same operational effects as those of the above embodiment can be obtained. In addition, according to the modification 2, the rigidity of the refrigerant supply tube unit 10 can be further improved.

In the above-described embodiment and modification, the fixing portion 32b is fixed to the housing 6, but the present invention is not limited thereto. The fixing portion 32b may be fixed to a member other than the case 6 housed in the case 6, for example.

In the above-described embodiment and modification, the first supply pipe 11 and the second supply pipe 12 are cylindrical pipes linearly extending in the axial direction, but the present invention is not limited thereto. The first supply pipe 11 and the second supply pipe 12 may be pipes other than pipes, block pipes, or the like. At least one of the first supply pipe 11 and the second supply pipe 12 may extend in a curved shape, for example, other than a straight shape.

In the above-described embodiment and modification, the case where the refrigerant is oil O has been described, but the present invention is not limited to this. The refrigerant may be any liquid having a function of being supplied to the stator 30 to cool the stator 30. The refrigerant may be, for example, an insulating liquid or water. When the refrigerant is water, the surface of the stator may be subjected to an insulating treatment. The pump 96 may be a pump other than an oil pump. The pump 96 is not limited to an electric pump, and may be, for example, a mechanical pump having a portion coupled to the shaft 21 and capable of conveying the refrigerant as the shaft 21 rotates about the motor axis J1.

In the above-described embodiment and modification, the case where the motor unit 1 does not include the inverter unit has been described, but the present invention is not limited to this. The motor unit 1 may include an inverter unit. In other words, the motor unit 1 may be integrally configured with the inverter unit.

The motor unit 1 may be any device that can drive an object to be driven using the motor 2 as a power source. The motor unit 1 may not have the transmission device 3. The torque of the motor 2 may be directly output from the shaft 21 of the motor 2 to the object. In this case, the motor unit 1 may also be referred to as a motor device or the like. The direction in which the motor axis J1 extends is not limited to the horizontal direction. The motor axis J1 may also extend in the vertical direction. The motor axis J1 may extend in an oblique direction combining the horizontal direction and the vertical direction. In the present specification, the phrase "the motor axis extends in the horizontal direction perpendicular to the vertical direction" includes not only the case where the motor axis J1 extends strictly in the horizontal direction but also the case where the motor axis J1 extends in the substantially horizontal direction. That is, in the present specification, the phrase "the motor axis extends in the horizontal direction perpendicular to the vertical direction" includes a configuration in which the motor axis J1 extends slightly obliquely to the horizontal direction. The use of the motor unit 1 is not particularly limited. The motor unit 1 may not be mounted on the vehicle.

In addition, the respective configurations (constituent elements) described in the above-described embodiment, modification, supplementary description, and the like may be combined, and addition, omission, replacement, and other changes of the configurations may be made without departing from the scope of the present invention. The present invention is not limited to the above embodiments and the like, but is limited only by the claims.

Claims (10)

1. A motor unit is characterized in that,

the motor unit includes:

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

a first supply pipe that injects a refrigerant at least to an outer peripheral surface of the stator;

a second supply pipe that injects the refrigerant at least to an outer peripheral surface of the stator and is disposed at a distance from the first supply pipe; and

a coupling portion that couples the first supply pipe and the second supply pipe,

the stator has a fixing portion protruding radially outward from an outer peripheral surface of the stator,

the fixing portion is disposed between the first supply pipe and the second supply pipe when viewed in a radial direction, and is disposed at a distance in a direction perpendicular to the radial direction with respect to the connecting portion.

2. The motor unit of claim 1,

the fixing portion is disposed at a distance from the coupling portion in the axial direction of the rotor when viewed in the radial direction.

3. The motor unit of claim 1,

the fixing portion is disposed at a distance from the coupling portion in a direction perpendicular to an axial direction of the rotor when viewed in a radial direction.

4. The motor unit of claim 1,

the coupling portion is connected to an end of the first supply pipe and an end of the second supply pipe.

5. The motor unit according to claim 4,

the connection portion is connected to a downstream end portion of both end portions of the first supply pipe, and is connected to a downstream end portion of both end portions of the second supply pipe.

6. The motor unit according to any one of claims 1 to 3,

the first supply pipe extends along a direction in which the fixing portion extends,

the second supply pipe extends along a direction in which the fixing portion extends.

7. The motor unit according to any one of claims 1 to 4,

the motor unit includes a housing that houses the motor, the first supply pipe, the second supply pipe, and the connection portion,

the coupling portion has a mounting fixing portion fixed to the housing.

8. The motor unit according to any one of claims 1 to 5,

the first supply pipe, the second supply pipe, and the coupling portion are part of one member.

9. The motor unit according to any one of claims 1 to 5,

the first supply pipe has a first injection hole penetrating a peripheral wall of the first supply pipe,

the second supply pipe has a second injection hole penetrating a peripheral wall of the second supply pipe,

a distance between the first injection hole and the fixing portion and a distance between the second injection hole and the fixing portion are the same as each other.

10. The motor unit of claim 9,

a first angle between an imaginary straight line passing through a center of the fixing portion and the motor axis and a center line of the first injection hole and a second angle between the imaginary straight line and a center line of the second injection hole are the same as each other when viewed from the axial direction.

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