CN114552891B - Rotating electrical machine and driving device - Google Patents

Rotating electrical machine and driving device Download PDF

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Publication number
CN114552891B
CN114552891B CN202111360051.1A CN202111360051A CN114552891B CN 114552891 B CN114552891 B CN 114552891B CN 202111360051 A CN202111360051 A CN 202111360051A CN 114552891 B CN114552891 B CN 114552891B
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CN
China
Prior art keywords
opposing
coil end
guide wall
wall portion
stator
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Active
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CN202111360051.1A
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Chinese (zh)
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CN114552891A (en
Inventor
辻本健斗
牧野祐辅
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Nidec Corp
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Nidec Corp
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

A rotating electric machine and a driving device. The rotating electrical machine has: a rotor; a stator; a refrigerant supply unit located at the upper side of the stator in the vertical direction and having a supply port for supplying refrigerant to the stator; and a 1 st guide wall portion located on the vertical direction upper side of the stator. The stator has a stator core and an annular coil end portion protruding from the stator core in an axial direction of the central axis. The 1 st guide wall portion has a 1 st opposing surface disposed to face the upper side of the coil end in the vertical direction and a 1 st curved surface curved from the 1 st opposing surface. The supply port includes a 1 st supply port for supplying the refrigerant to the coil end. The 1 st supply port includes a 1 st opposing port opening to the 1 st opposing surface. The 1 st curved surface is curved radially outward from an end portion of the 1 st opposing surface on a side farther from the 1 st opposing opening, as viewed in the axial direction of the central axis. When viewed in the vertical direction, the boundary between the 1 st facing surface and the 1 st curved surface overlaps the coil end portion at a position radially outward of the inner edge of the coil end portion.

Description

Rotating electrical machine and driving device
Technical Field
The present invention relates to a rotating electrical machine and a driving device.
Background
A rotary electric machine having a structure for supplying a refrigerant to a stator is known. For example, patent document 1 describes a rotating electrical machine having a structure in which cooling oil as a refrigerant is injected into a stator core.
Patent document 1: japanese patent application laid-open No. 2012-115001
In a rotating electrical machine having a configuration in which a refrigerant is supplied to a stator, sometimes the refrigerant is supplied to coil ends. However, in this case, the refrigerant supplied to the coil end may flow in the gap between the wires constituting the coil, and it may be difficult to supply the refrigerant to a part of the coil end. Therefore, it may be difficult to sufficiently cool the coil end.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a rotating electrical machine and a driving device having a structure capable of improving cooling efficiency of coil ends.
One embodiment of the present invention is a rotating electrical machine, including: a rotor rotatable about a central axis extending in a direction intersecting the vertical direction; a stator located radially outward of the rotor; a refrigerant supply unit located on the upper side of the stator in the vertical direction and having a supply port for supplying refrigerant to the stator; and a 1 st guide wall portion located on the vertical direction upper side of the stator. The stator has: a stator core; and an annular coil end portion protruding from the stator core in an axial direction of the central axis. The 1 st guide wall portion has: a 1 st opposing surface disposed to face an upper side of the coil end in the vertical direction; and a 1 st curved surface curved from the 1 st opposing surface. The supply port includes a 1 st supply port for supplying the refrigerant to the coil end. The 1 st supply port includes a 1 st opposing port opening to the 1 st opposing surface. The 1 st curved surface is curved radially outward from an end portion of the 1 st opposing surface on a side farther from the 1 st opposing opening, as viewed in an axial direction of the central axis. The boundary between the 1 st facing surface and the 1 st curved surface overlaps the coil end portion at a position radially outward of the inner edge of the coil end portion when viewed in the vertical direction.
One aspect of the present invention is a drive device that is mounted on a vehicle and rotates an axle, the drive device including: the rotating electrical machine described above; and a transmission device connected to the rotating electrical machine and transmitting rotation of the rotor to the axle.
According to one aspect of the present invention, in the rotating electrical machine and the driving device, the cooling efficiency of the coil end can be improved.
Drawings
Fig. 1 is a schematic configuration diagram schematically showing a driving device according to an embodiment.
Fig. 2 is a perspective view showing a stator and a refrigerant supply portion according to an embodiment.
Fig. 3 is a view of the stator and the refrigerant supply portion of the embodiment as viewed from the upper side.
Fig. 4 is a sectional view showing a driving device of an embodiment, and is an IV-IV sectional view in fig. 1.
Fig. 5 is a cross-sectional view showing a driving device of an embodiment, and is a V-V cross-sectional view in fig. 1.
Fig. 6 is a diagram showing the 1 st guide wall portion in a modification of the embodiment.
Fig. 7 is a schematic configuration diagram schematically showing a driving device in another modification of the embodiment.
Description of the reference numerals
10. 210, 310: a rotating electric machine; 24. 81, 281: a 1 st guide wall portion; 24a, 81f, 281f: a 1 st opposed surface; 24b, 81g, 281g: a 1 st curved surface; 25. 82: a 2 nd guide wall portion; 25a, 82f: a 2 nd opposed surface; 25b, 82g: a 2 nd curved surface; 30: a rotor; 40: a stator; 41: a stator core; 42a, 42b: a coil end; 42c: a coil; 42d: an inner edge; 50. 350: a refrigerant supply unit; 50a: a supply port; 54: a 1 st supply port; 55: a 2 nd supply port; 57a, 57c: 1 st opposing port; 57b, 57d: a 2 nd opposing port; 58. 58a, 58b: a 3 rd opposing port; 60: a transfer device; 64: an axle; 100. 300: a driving device; 245a: a bus bar; 245b: a bus bar holder; BP1, BP2, BP3, BP4: a boundary; j: a central axis.
Detailed Description
In the following description, a vertical direction is defined based on a positional relationship in a case where the driving device of the embodiment is mounted on a vehicle on a horizontal road surface, and will be described. That is, the relative positional relationship in the vertical direction described in the following embodiments is at least satisfied when the driving device is mounted on a vehicle on a horizontal road surface.
In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is the vertical direction. The +Z side is the upper side in the vertical direction, and the-Z side is the lower side in the vertical direction. In the following description, the upper side in the vertical direction will be simply referred to as "upper side", and the lower side in the vertical direction will be simply referred to as "lower side". The X-axis direction is a direction perpendicular to the Z-axis direction, and is a front-rear direction of a vehicle on which the drive device is mounted. In the following embodiments, the +x side is the front side of the vehicle, and the-X side is the rear side of the vehicle. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction, and is a left-right direction of the vehicle, that is, a vehicle width direction. In the following embodiments, the +y side is the left side of the vehicle, and the-Y side is the right side of the vehicle. The front-rear direction and the left-right direction are horizontal directions perpendicular to the vertical direction.
The positional relationship in the front-rear direction is not limited to the positional relationship in the following embodiment, and the +x side may be the rear side of the vehicle, and the-X side may be the front side of the vehicle. In this case, the +y side is the right side of the vehicle, and the-Y side is the left side of the vehicle. In the present specification, "parallel direction" also includes a substantially parallel direction, and "perpendicular direction" also includes a substantially perpendicular direction.
The center axis J shown in the figure is a virtual axis extending in a direction intersecting the vertical direction. More specifically, the center axis J extends in the Y-axis direction perpendicular to the vertical direction, that is, in the left-right direction of the vehicle. In the following description, unless otherwise specified, a direction parallel to the central axis J is simply referred to as an "axial direction", a radial direction centered on the central axis J is simply referred to as a "radial direction", and a circumferential direction centered on the central axis J, that is, a direction around the central axis J is simply referred to as a "circumferential direction".
The arrow θ appropriately illustrated represents the circumferential direction. In the following description, a side that advances clockwise about the central axis J when viewed from the right side, that is, a side toward which the arrow θ faces (+θ side) is referred to as "circumferential side", and a side that advances counterclockwise about the central axis J when viewed from the right side, that is, a side opposite to the side toward which the arrow θ faces (- θ side) is referred to as "circumferential side".
The driving device 100 of the present embodiment shown in fig. 1 is a driving device mounted on a vehicle and configured to rotate the axle 64. The vehicle mounted with the drive device 100 is a vehicle using 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). As shown in fig. 1, the driving device 100 has a rotary electric machine 10 and a transmission device 60. The transmission device 60 is connected to the rotating electrical machine 10, and transmits rotation of the rotating electrical machine 10, that is, rotation of a rotor 30 described later, to an axle 64 of the vehicle. The transmission device 60 of the present embodiment includes a gear housing 61, a reduction gear 62 connected to the rotary electric machine 10, and a differential gear 63 connected to the reduction gear 62.
The gear housing 61 houses therein a reduction gear 62, a differential gear 63, and oil O. Oil O is stored in a lower region within the gear housing 61. The oil O circulates in a refrigerant flow path 90 described later. The oil O serves as a refrigerant for cooling the rotary electric machine 10. The oil O is used as lubricating oil for the reduction gear 62 and the differential gear 63. For example, in order to function as a refrigerant or a lubricating oil, it is preferable to use an oil equivalent to a lubricating oil (ATF: automatic Transmission Fluid) for an automatic transmission having a relatively low viscosity.
The differential gear 63 has a ring gear 63a. The torque output from the rotary electric machine 10 is transmitted to the ring gear 63a via the reduction gear 62. The lower end portion of the ring gear 63a is immersed in the oil O stored in the gear housing 61. By the rotation of the ring gear 63a, the oil O is lifted. The lifted oil O is supplied as lubricating oil to the reduction gear 62 and the differential gear 63, for example.
The rotary electric machine 10 is a part driven by the driving device 100. The rotary electric machine 10 is located, for example, on the right side of the transmission device 60. In the present embodiment, the rotary electric machine 10 is a motor. The rotary electric machine 10 includes a motor case 20, a rotor 30 rotatable about a central axis J, a stator 40, and a refrigerant supply unit 50.
The motor case 20 is a case that accommodates the rotor 30 and the stator 40 therein. The motor housing 20 is connected to the right side of the gear housing 61. The motor housing 20 has a peripheral wall portion 21, a partition wall portion 22, and a cover portion 23. The peripheral wall portion 21 and the partition wall portion 22 are, for example, part of the same single member. The cover portion 23 is, for example, separate from the peripheral wall portion 21 and the partition wall portion 22.
The peripheral wall portion 21 has a tubular shape surrounding the central axis J and opening on the right side. The partition wall 22 is connected to the left end of the peripheral wall 21. The partition wall portion 22 separates the inside of the motor housing 20 from the inside of the gear housing 61 in the axial direction. The partition wall 22 has a partition wall opening 22a connecting the inside of the motor housing 20 with the inside of the gear housing 61. The bearing 34 is held in the partition wall 22. The cover 23 is fixed to the right end of the peripheral wall 21. The cover 23 closes the opening on the right side of the peripheral wall 21. The bearing 35 is held in the cover 23.
The rotor 30 has a shaft 31 and a rotor body 32. Although not shown, the rotor body 32 includes a rotor core and a rotor magnet fixed to the rotor core. The torque of the rotor 30 is transmitted to the transmission 60.
The shaft 31 is rotatable about the central axis J. The shaft 31 is rotatably supported by bearings 34 and 35. In the present embodiment, the shaft 31 is a hollow shaft. The shaft 31 has a cylindrical shape extending in the axial direction about the central axis J. The shaft 31 is provided with a hole 33 connecting the inside of the shaft 31 and the outside of the shaft 31. The shaft 31 extends across the interior of the motor housing 20 and the interior of the gear housing 61. The left end of the shaft 31 protrudes into the gear housing 61. A reduction gear 62 is connected to the left end of the shaft 31.
The stator 40 and the rotor 30 are opposed to each other with a gap therebetween in the radial direction. In more detail, the stator 40 is located radially outside the rotor 30. The stator 40 is fixed inside the motor housing 20. As shown in fig. 2 and 3, the stator 40 has a stator core 41 and a coil assembly 42.
The stator core 41 has a ring shape surrounding the central axis J of the rotary electric machine 10. As shown in fig. 1, the stator core 41 is located radially outside the rotor 30. The stator core 41 surrounds the rotor 30. The stator core 41 is configured by, for example, laminating a plurality of plate members such as electromagnetic steel plates in the axial direction.
As shown in fig. 2, the stator core 41 has a stator core main body 43 and a fixing portion 44. The stator core body 43 has a ring shape surrounding the rotor 30. More specifically, the stator core body 43 is cylindrical and opens on both sides in the axial direction with the central axis J as the center. The stator core body 43 has a cylindrical outer peripheral surface surrounding the rotor 30. A part of the outer peripheral surface of the stator core main body 43 is supported from the radial outside by a support portion provided on the inner peripheral surface of the motor case 20.
The stator core body 43 has a cylindrical core back portion 43a extending in the axial direction and a plurality of teeth 43b extending radially inward from the core back portion 43 a. The outer peripheral surface of the core back 43a is the outer peripheral surface of the stator core body 43. The plurality of teeth 43b are arranged at equal intervals over the entire circumference in the circumferential direction.
The fixing portion 44 protrudes radially outward from the outer peripheral surface of the stator core body 43. The fixing portion 44 is a portion fixed to the motor housing 20. The fixing portion 44 extends in the axial direction. The fixing portion 44 extends from, for example, the left end of the stator core body 43 to the right end of the stator core body 43. The circumferential dimension of the fixing portion 44 becomes smaller as it goes radially outward. The fixing portions 44 are provided in plurality at intervals in the circumferential direction. The number of fixing portions 44 is 4, for example.
Each fixing portion 44 has a through hole 44c penetrating each fixing portion 44 in the axial direction. The through hole 44c is, for example, a circular hole. The bolt 27 extending in the axial direction is inserted into the through hole 44c. Although not shown, the bolt 27 is inserted into the through hole 44c from the right side (-Y side), for example. As shown in fig. 4, the bolts 27 are screwed into internally threaded holes 26 provided in the motor housing 20. Thus, the fixing portion 44 is fixed to the motor housing 20 by the bolts 27.
As shown in fig. 2, the fixing portion 44 includes a 1 st fixing portion 44a and a 2 nd fixing portion 44b. In the present embodiment, the 1 st fixing portion 44a and the 2 nd fixing portion 44b are located above the central axis J. The 1 st fixing portion 44a is provided at an upper end portion of the front side portion of the stator core main body 43. The 1 st fixing portion 44a protrudes obliquely upward and forward from the stator core main body 43. The 2 nd fixing portion 44b is provided at an upper end portion of the rear portion of the stator core main body 43. The 2 nd fixing portion 44b protrudes obliquely upward and rearward from the stator core main body 43.
As shown in fig. 1, the coil assembly 42 has a plurality of coils 42c mounted to the stator core 41 in the circumferential direction. The plurality of coils 42c are mounted on the teeth 43b of the stator core 41 via insulation members, not shown. The plurality of coils 42c are arranged along the circumferential direction. More specifically, the plurality of coils 42c are arranged at equal intervals over the entire circumference along the circumferential direction. In the present embodiment, the coil 42c is formed by winding a flat wire. Although not shown, the coil block 42 may have a binding member or the like for binding the coils 42c, or may have a bonding wire for connecting the coils 42c to each other.
The coil block 42 has annular coil ends 42a, 42b protruding in the axial direction from the stator core 41. That is, the stator 40 has coil ends 42a, 42b. The coil end 42a is a portion protruding leftward from the stator core 41. The coil end 42b is a portion protruding rightward from the stator core 41. The coil end 42a includes a portion of each coil 42c included in the coil block 42 protruding leftward from the stator core 41. The coil end 42b includes a portion of each coil 42c included in the coil assembly 42 protruding rightward from the stator core 41. That is, the coil end portions 42a and 42b include a part of the coil 42c formed by winding a flat wire. In the present embodiment, the coil end portions 42a and 42b are annular with the central axis J as the center. Although not shown, the coil end portions 42a and 42b may include a binding member or the like for binding the coils 42c, or may include a bonding wire for connecting the coils 42c to each other.
In the present embodiment, the refrigerant supply portion 50 has a tubular shape extending in the axial direction. In other words, in the present embodiment, the refrigerant supply portion 50 is a tube extending in the axial direction. Both axial end portions of the refrigerant supply portion 50 are supported by the motor housing 20. The left end of the refrigerant supply portion 50 is supported by the partition wall 22, for example. The right end of the refrigerant supply unit 50 is supported by the cover 23, for example. The refrigerant supply portion 50 is located radially outward of the stator 40. The refrigerant supply portion 50 is located at an upper side of the stator 40.
As shown in fig. 2, the refrigerant supply portion 50 is located between the 1 st fixing portion 44a and the 2 nd fixing portion 44b in the circumferential direction. In the present embodiment, the refrigerant supply portion 50 is disposed closer to the 2 nd fixing portion 44b than the 1 st fixing portion 44a in the circumferential direction. The entire refrigerant supply portion 50 is located, for example, at a position rearward of the center axis J. The refrigerant supply portion 50 has a wide portion 51, an inflow portion 52, and an outflow portion 53.
In the present embodiment, the entire refrigerant supply portion 50 except for the inflow port portion 52 and the outflow port portion 53 is formed as the wide portion 51. In the present embodiment, the wide portion 51 is a main body portion of the refrigerant supply portion 50. The wide portion 51 is located radially outward of the stator 40. The wide portion 51 is located at an upper side of the stator 40.
As shown in fig. 2 and 3, the axial dimension of the wide portion 51 is larger than the axial dimension of the stator core 41. The wide portion 51 protrudes axially to both sides from the stator core 41. The wide portion 51 is disposed so as to span the upper side of the stator core 41 and the upper sides of the coil end portions 42a and 42 b. The portion of the wide portion 51 protruding leftward from the stator core 41 is located above the coil end 42 a. The portion of the wide portion 51 protruding rightward from the stator core 41 is located above the coil end 42 b.
The wide portion 51 is a portion having a larger circumferential dimension than a radial dimension. As shown in fig. 4 and 5, the wide portion 51 is, for example, a cylindrical shape flattened in the radial direction, that is, a substantially elliptical cylindrical shape flattened in the radial direction. The radially inner surface of the wide portion 51 is radially opposed to the outer peripheral surface of the stator core 41. The radially inner surface of the wide portion 51 is shaped along the outer peripheral surface of the stator core body 43.
As shown in fig. 2 and 3, the inflow portion 52 is connected to the left end of the wide portion 51. The inflow port 52 has a cylindrical shape that opens on the left side. The inflow port 52 is the left end of the refrigerant supply portion 50. The inflow portion 52 is fitted into a hole, not shown, provided in the partition wall portion 22, for example, and is supported by the partition wall portion 22. The oil O flows into the refrigerant supply portion 50 from the inflow port 52.
The flow outlet portion 53 is connected to the right end of the wide portion 51. The flow outlet 53 has a cylindrical shape that opens on the right side. The flow outlet portion 53 is the right end of the refrigerant supply portion 50. The outlet portion 53 is fitted into a hole, not shown, provided in the cover portion 23, for example, and is supported by the cover portion 23. A part of the oil O flowing into the refrigerant supply portion 50 from the inflow portion 52 flows out from the outflow portion 53. In the present embodiment, the direction in which the oil O flows in the refrigerant supply portion 50 is the direction from the left side to the right side. That is, in the flow direction of the oil O in the refrigerant supply portion 50, the left side is the upstream side, and the right side is the downstream side.
As shown in fig. 3, the refrigerant supply portion 50 has a supply port 50a that supplies oil O as a refrigerant to the stator 40. In the present embodiment, the supply port 50a is an injection port that injects a part of the oil O flowing into the refrigerant supply portion 50 to the outside of the refrigerant supply portion 50. The supply ports 50a are provided in plural. In the present embodiment, all the supply ports 50a are provided in the wide portion 51.
The supply port 50a is formed by a hole penetrating a wall portion of the tubular refrigerant supply portion 50 from the inner peripheral surface to the outer peripheral surface. The supply port 50a is an opening portion that opens on the outer peripheral surface of the refrigerant supply portion 50, from the inner peripheral surface to the outer peripheral surface, of opening portions that penetrate through holes in the wall portion of the tubular refrigerant supply portion 50. The supply port 50a is, for example, circular in shape. In the present embodiment, the supply port 50a provided in the wide portion 51 includes the 1 st supply port 54 and the 2 nd supply port 55.
The 1 st supply port 54 is a supply port 50a for supplying the oil O as the refrigerant to the coil end portions 42a, 42 b. The 1 st supply port 54 is located above the coil ends 42a, 42 b. The 1 st supply port 54 includes 1 st opposing ports 57a, 57c, 2 nd opposing ports 57b, 57d, and 3 rd opposing port 58.
The 1 st opposing port 57a and the 2 nd opposing port 57b are located on the left side of the 2 nd supply port 55. The 1 st opposing port 57a and the 2 nd opposing port 57b are located above the coil end 42 a. The 1 st opposing port 57c and the 2 nd opposing port 57d are located on the right side of the 2 nd supply port 55. The 1 st opposing port 57c and the 2 nd opposing port 57d are located above the coil end 42 b. A plurality of 3 rd opposing ports 58 are provided on the upper side of the coil end 42a and the upper side of the coil end 42 b. The 3 rd opposing port 58 includes, for example, 3 rd opposing ports 58a located on the upper side of the coil end 42a and 3 rd opposing ports 58b located on the upper side of the coil end 42 b.
As shown in fig. 4, the 1 st opposing port 57a is provided at the front end (+x side) of the wide portion 51. The 1 st opposing port 57a opens obliquely downward toward the front side. The 1 st opposing port 57a opens to a 1 st opposing surface 24a described later. The 2 nd opposing port 57b is provided at the end of the rear side (-X side) of the wide portion 51. The 2 nd opposing port 57b opens obliquely downward toward the rear side. The 2 nd opposing port 57b opens to a 2 nd opposing surface 25a described later.
In the present specification, the term "a certain port opens to a certain object" means that at least a part of a certain port overlaps with a certain object when viewed in the direction of the certain port opening. That is, the phrase "the 1 st opposing opening 57a opens to the 1 st opposing surface 24 a" means that at least a part of the 1 st opposing opening 57a overlaps with the 1 st opposing surface 24a when viewed in the direction in which the 1 st opposing opening 57a opens. The term "the 2 nd opposing port 57b opens to the 2 nd opposing surface 25 a" means that at least a part of the 2 nd opposing port 57b overlaps the 2 nd opposing surface 25a when viewed in the direction in which the 2 nd opposing port 57b opens.
The direction in which the 1 st opposing port 57a opens is, for example, a direction in which the hole constituting the 1 st opposing port 57a penetrates the wall of the refrigerant supply portion 50 from the inner peripheral surface to the outer peripheral surface. The direction in which the 2 nd opposing port 57b opens is, for example, a direction in which the hole constituting the 2 nd opposing port 57b penetrates the wall of the refrigerant supply portion 50 from the inner peripheral surface to the outer peripheral surface. In the present embodiment, the entire 1 st opposing opening 57a overlaps the 1 st opposing surface 24a when viewed in the direction in which the 1 st opposing opening 57a opens. The entire 2 nd opposing port 57b overlaps the 2 nd opposing surface 25a when viewed in the direction in which the 2 nd opposing port 57b opens.
The 3 rd opposed openings 58a located on the upper side of the coil end 42a are provided in the radially inner portion of the wide portion 51. The 3 rd opposing ports 58a are arranged between the 1 st opposing port 57a and the 2 nd opposing port 57b in the circumferential direction around the outer peripheral surface of the refrigerant supply portion 50. The 3 rd opposing port 58a is opened at the lower side. More specifically, the 3 rd opposing port 58a includes 2 3 rd opposing ports 58a opening obliquely forward downward and 1 rd opposing port 58a opening obliquely rearward downward. The 3 rd opposing port 58a opens toward the coil end 42 a.
As shown in fig. 5, the 1 st opposing port 57c is provided at the front end (+x side) of the wide portion 51. The 1 st opposing port 57c opens obliquely downward toward the front side. The 1 st opposing port 57c opens to a 1 st opposing surface 81f described later. The 2 nd opposing port 57d is provided at the end of the rear side (-X side) of the wide portion 51. The 2 nd opposing port 57d opens obliquely downward toward the rear side. The 2 nd opposing port 57d opens to a 2 nd opposing surface 82f described later.
The 3 rd opposed openings 58b located on the upper side of the coil end 42b are provided in the radially inner portion of the wide portion 51. The 3 rd opposing ports 58b are arranged between the 1 st opposing port 57c and the 2 nd opposing port 57d in the circumferential direction around the outer peripheral surface of the refrigerant supply portion 50. The 3 rd opposing port 58b is opened at the lower side. More specifically, the 3 rd opposing ports 58b include 2 3 rd opposing ports 58b opening obliquely forward downward and 1 rd opposing port 58b opening obliquely rearward downward. The 3 rd opposing port 58b opens toward the coil end 42 b.
The 2 nd supply port 55 is a supply port 50a for supplying the oil O as the refrigerant to the stator core 41. As shown in fig. 3, the 2 nd supply port 55 is located on the upper side of the stator core 41. The 2 nd supply port 55 is provided in plural. Although not shown, the 2 nd supply port 55 includes a 2 nd supply port 55 that opens on one side (+θ side) in the circumferential direction and a 2 nd supply port 55 that opens on the other side (+θ side) in the circumferential direction. A plurality of 2 nd supply ports 55 open on one side in the circumferential direction and a plurality of 2 nd supply ports 55 open on the other side in the circumferential direction are provided at intervals in the axial direction.
The rotary electric machine 10 has the 1 st guide wall portion 24, 81 and the 2 nd guide wall portion 25, 82. The 1 st guide wall portion 24, 81 and the 2 nd guide wall portion 25, 82 are located on the upper side of the stator 40. The 2 nd guide wall portion 25 and the 1 st guide wall portion 24 are disposed with the refrigerant supply portion 50 interposed therebetween in the front-rear direction when viewed in the vertical direction. The 2 nd guide wall 82 and the 1 st guide wall 81 are disposed with the refrigerant supply portion 50 interposed therebetween in the front-rear direction when viewed in the vertical direction. The 1 st guide wall portions 24 and 81 are located on the front side of the central axis J and the refrigerant supply portion 50. The 2 nd guide wall portions 25, 82 are located on the rear side of the central axis J and the refrigerant supply portion 50.
As shown in fig. 4, in the present embodiment, the 1 st guide wall portion 24 and the 2 nd guide wall portion 25 are part of the motor housing 20. The 1 st guide wall portion 24 and the 2 nd guide wall portion 25 are provided on the inner peripheral surface of the peripheral wall portion 21. In the present embodiment, the 1 st guide wall portion 24 and the 2 nd guide wall portion 25 are portions provided with female screw holes 26 into which bolts 27 for fixing the fixing portion 44 are screwed.
The 1 st guide wall portion 24 is located on the upper side of the front side portion of the coil end 42 a. The 1 st guide wall portion 24 has a 1 st facing surface 24a and a 1 st curved surface 24b. The 1 st opposing surface 24a is disposed to face the upper side of the coil end 42 a. The 1 st opposing surface 24a is radially opposed to the coil end 42 a. In the present embodiment, the 1 st opposing surface 24a is an inclined surface inclined with respect to a horizontal plane perpendicular to the vertical direction. The 1 st opposing surface 24a is, for example, a surface parallel to the axial direction. The 1 st opposing surface 24a is inclined rearward downward. The 1 st opposing surface 24a is located on the lower side as it goes toward the front side (+x side). Here, in the present embodiment, the 1 st facing surface 24a is located on the front side of the refrigerant supply portion 50. That is, the 1 st opposing surface 24a is located on the lower side as it is away from the 1 st opposing opening 57 a. The rear end (-X side) of the 1 st facing surface 24a faces the 1 st facing opening 57 a.
The 1 st curved surface 24b is a surface curved from the 1 st opposing surface 24 a. The 1 st curved surface 24b is curved radially outward from an end portion of the 1 st opposing surface 24a on a side farther from the 1 st opposing port 57a when viewed in the axial direction of the central axis J. That is, in the present embodiment, the 1 st curved surface 24b is curved radially outward from the end portion of the 1 st opposing surface 24a on the front side (+x side). In the present embodiment, the front end of the 1 st facing surface 24a is also the lower end of the 1 st facing surface 24 a. The 1 st curved surface 24b extends obliquely upward and forward from the front end of the 1 st opposing surface 24 a. The 1 st curved surface 24b is inclined downward toward the front side.
The 1 st curved surface 24b is curved with respect to the 1 st opposing surface 24aIs more than 90 degrees. In this embodiment, the buckling angle +.>90 deg.. The 1 st curved surface 24b is curved from the 1 st opposing surface 24a in a direction inclined upward with respect to the front-rear direction, i.e., the horizontal direction. Inclination of 1 st curved surface 24b with respect to the horizontal direction +.>For example less than 90. Angle of corner formed by 1 st counter surface 24a and 1 st curved surface 24b ∈1>Is less than 90 degrees. In this embodiment, the angle +.>90 deg..
As shown in fig. 3 and 4, the boundary BP1 between the 1 st opposing surface 24a and the 1 st curved surface 24b overlaps the coil end 42a at a position radially outward of the inner edge 42d of the coil end 42a when viewed in the vertical direction. In the present embodiment, the boundary BP1 is located above a portion of the coil end 42a on the front side (+x side) from the inner edge 42 d. The boundary BP1 overlaps a portion of the front side portion of the coil end 42a, which is closer to the outer edge 42f of the coil end 42a than the inner edge 42d, as viewed in the vertical direction. That is, the boundary BP1 overlaps a portion of the front side portion of the coil end 42a that is on the front side of the center in the front-rear direction when viewed in the vertical direction. The boundary BP1 overlaps a portion of the coil end 42a that is located radially inward (-X side) of the outer edge 42f when viewed in the vertical direction.
The 2 nd guide wall portion 25 is located on the upper side of the rear side portion of the coil end 42 a. The 2 nd guide wall portion 25 has a 2 nd opposing surface 25a and a 2 nd buckling surface 25b. The 2 nd facing surface 25a is disposed to face the upper side of the coil end 42 a. The 2 nd opposing surface 25a is radially opposed to the coil end 42 a. As shown in fig. 4, in the present embodiment, the 2 nd facing surface 25a is an inclined surface inclined with respect to a horizontal plane perpendicular to the vertical direction. The 2 nd facing surface 25a is, for example, a surface parallel to the axial direction. The 2 nd opposing surface 25a is inclined forward toward the lower side. The 2 nd opposing surface 25a is located on the lower side as it faces the rear side (-X side). Here, in the present embodiment, the 2 nd facing surface 25a is located at a position on the rear side of the refrigerant supply unit 50. That is, the 2 nd facing surface 25a is located on the lower side as it is away from the 2 nd facing opening 57 b. The front side (+x side) portion of the 2 nd facing surface 25a faces the 2 nd facing opening 57 b.
The 2 nd buckling surface 25b is a surface buckling from the 2 nd opposing surface 25 a. The 2 nd buckling surface 25b buckles radially outward from an end portion of the 2 nd opposing surface 25a on a side farther from the 2 nd opposing port 57b, as viewed in the axial direction of the central axis J. That is, in the present embodiment, the 2 nd buckling surface 25b buckles radially outward from the end of the rear side (-X side) of the 2 nd opposing surface 25 a. In the present embodiment, the rear end of the 2 nd facing surface 25a is also the lower end of the 2 nd facing surface 25 a. The 2 nd buckling surface 25b extends obliquely upward and rearward from the rear end of the 2 nd opposing surface 25 a. The 2 nd curved surface 25b is inclined downward toward the rear side.
2 nd buckling face 25b relative to 2 nd pairBending angle of the placement surface 25aIs more than 90 degrees. In this embodiment, the buckling angle +.>90 deg.. The 2 nd buckling surface 25b buckles from the 2 nd opposing surface 25a in a direction inclined upward with respect to the front-rear direction, i.e., the horizontal direction. Inclination of the 2 nd buckling face 25b with respect to the horizontal direction +.>For example less than 90. Angle ∈2 of corner formed by the 2 nd opposing surface 25a and the 2 nd buckling surface 25b>Is less than 90 degrees. In this embodiment, the angle +.>90 deg..
As shown in fig. 3 and 4, the boundary BP2 between the 2 nd opposed surface 25a and the 2 nd curved surface 25b overlaps the coil end 42a at a position radially outward of the inner edge 42d of the coil end 42a when viewed in the vertical direction. In the present embodiment, the boundary BP2 is located above a portion of the coil end 42a on the rear side (-X side) of the inner edge 42 d. The boundary BP2 overlaps with a portion of the rear side portion of the coil end 42a that is closer to the outer edge 42f of the coil end 42a than the inner edge 42d, as viewed in the vertical direction. That is, the boundary BP2 overlaps a portion of the rear side portion of the coil end 42a that is located rearward from the center in the front-rear direction when viewed in the vertical direction. The boundary BP2 overlaps a portion of the coil end 42a that is farther radially inward (+x side) than the outer edge 42f when viewed in the vertical direction.
As shown in fig. 2 and 5, in the present embodiment, the 1 st guide wall portion 81 and the 2 nd guide wall portion 82 are fixed to the stator core 41. More specifically, the 1 st guide wall 81 is fixed to the 1 st fixing portion 44a. The 2 nd guide wall 82 is fixed to the 2 nd fixing portion 44b. The 1 st guide wall portion 81 is located on the right side of the 1 st fixing portion 44a. The 2 nd guide wall portion 82 is located on the right side of the 2 nd fixing portion 44b. The 1 st guide wall portion 81 and the 2 nd guide wall portion 82 are separate single members, respectively.
The 1 st guide wall portion 81 includes a fixed portion 81a, a wall portion main body 81b, and a claw portion 81c. The fixed portion 81a is a portion fixed to the 1 st fixed portion 44a. The fixed portion 81a has a fixing hole 81d penetrating the fixed portion 81a in the axial direction. Bolts 27 for fixing the stator core 41 to the motor case 20 are inserted into the fixing holes 81d. Thereby, the stator core 41 and the 1 st guide wall 81 are fastened together to the motor housing 20. As shown in fig. 2, the claw portion 81c protrudes leftward from the fixed portion 81 a. The claw portion 81c is hooked to the 1 st fixing portion 44a from the other side (θ side) in the circumferential direction. The 1 st guide wall portion 81 is positioned around the central axis of the fixing hole 81d with respect to the 1 st fixing portion 44a by the claw portion 81c.
The wall body 81b is connected to a radially inner end of the fixed portion 81 a. The wall body 81b is, for example, plate-shaped extending upward in a direction inclined in the vertical direction with respect to the front-rear direction. The wall body 81b protrudes obliquely upward rearward than the fixed portion 81 a. The wall body 81b protrudes rightward from the fixed portion 81 a. As shown in fig. 5, a recess 81e is provided on the radially outer side surface of the wall body 81 b. A part of the screw head of the bolt 27 is disposed in the recess 81e.
The wall body 81b has a 1 st facing surface 81f and a 1 st curved surface 81g. The 1 st opposing surface 81f is a surface radially inward of the plate surface of the plate-like wall body 81 b. The arrangement relationship of the 1 st facing surface 81f with respect to the coil end 42b and the 1 st facing port 57c is the same as the arrangement relationship of the 1 st facing surface 24a with respect to the coil end 42a and the 1 st facing port 57 a.
The radial distance between the 1 st opposing surface 81f and the coil end 42b is larger than the radial distance between the 1 st opposing surface 24a and the coil end 42a, for example. Therefore, even when the connecting terminal portion connected to the power supply is provided on the outer peripheral portion of the coil end portion 42b, interference between the connecting terminal portion and the 1 st opposing surface 81f can be suppressed. The inclination of the 1 st opposing surface 81f with respect to the front-rear direction is larger than the inclination of the 1 st opposing surface 24a with respect to the front-rear direction, for example. The 1 st opposing surface 81f extends a length smaller than that of the 1 st opposing surface 24a, for example, when viewed in the axial direction.
The arrangement relationship of the 1 st curved surface 81g with respect to the 1 st facing surface 81f and the 1 st facing opening 57c is the same as the arrangement relationship of the 1 st curved surface 24b with respect to the 1 st facing surface 24a and the 1 st facing opening 57 a. The 1 st curved surface 81g extends a length smaller than that of the 1 st curved surface 24b, for example, when viewed in the axial direction.
Bending angle of the 1 st curved surface 81g with respect to the 1 st opposing surface 81fIs more than 90 degrees. In this embodiment, the buckling angle +.>90 deg.. Namely, the buckling angle +>A buckling angle +/with respect to the 1 st opposing surface 24a with respect to the 1 st curved surface 24b>The same applies. Inclination of 1 st curved surface 81g with respect to the horizontal direction +.>For example less than 90. Inclination->For example, the inclination with respect to the horizontal direction of the 1 st curved surface 24b is +.>Is small. Angle of corner portion formed by 1 st opposing surface 81f and 1 st curved surface 81gIs less than 90 degrees. In this embodiment, the angle +.>90 deg.. I.e. angle->For example, an angle with a corner portion formed by the 1 st opposing surface 24a and the 1 st curved surface 24b +.>The same applies.
The arrangement relation of the boundary BP3 between the 1 st opposing surface 81f and the 1 st curved surface 81g with respect to the coil end 42b is the same as the arrangement relation of the boundary BP1 between the 1 st opposing surface 24a and the 1 st curved surface 24b with respect to the coil end 42 a. That is, the boundary BP3 overlaps the coil end 42b at a position radially outward of the inner edge 42e of the coil end 42b when viewed in the vertical direction. The boundary BP3 overlaps a portion of the coil end 42b that is located radially inward (-X side) of the outer edge 42g when viewed in the vertical direction.
As shown in fig. 2 and 5, the 2 nd guide wall 82 has a fixed portion 82a, a wall main body 82b, and a claw portion 82c. The fixed portion 82a is a portion fixed to the 2 nd fixed portion 44b. The fixed portion 82a has a fixing hole 82d penetrating the fixed portion 82a in the axial direction. Bolts 27 for fixing the stator core 41 to the motor case 20 are inserted into the fixing holes 82d. Thereby, the stator core 41 and the 2 nd guide wall 82 are fastened together to the motor housing 20. As shown in fig. 2, the claw 82c protrudes leftward from the fixed portion 82 a. The claw portion 82c is hooked from the circumferential direction side (+θ side) to the 2 nd fixing portion 44b. The 2 nd guide wall portion 82 is positioned around the central axis of the fixing hole 82d with respect to the 2 nd fixing portion 44b by the claw portion 82c.
The wall body 82b is connected to a radially inner end of the fixed portion 82 a. The wall body 82b is, for example, plate-shaped extending upward in a direction inclined in the vertical direction with respect to the front-rear direction. The wall body 82b protrudes obliquely upward toward the front side than the fixed portion 82 a. The wall body 82b protrudes rightward from the fixed portion 82 a. As shown in fig. 5, a recess 82e is provided on the radially outer side surface of the wall body 82 b. A part of the screw head of the bolt 27 is disposed in the recess 82e.
The wall body 82b has a 2 nd opposing surface 82f and a 2 nd buckling surface 82g. The 2 nd facing surface 82f is a radially inner surface of the plate-like wall body 82 b. The arrangement relationship of the 2 nd facing surface 82f with respect to the coil end 42b and the 2 nd facing port 57d is the same as the arrangement relationship of the 2 nd facing surface 25a with respect to the coil end 42a and the 2 nd facing port 57 b.
The radial distance between the 2 nd facing surface 82f and the coil end 42b is larger than the radial distance between the 2 nd facing surface 25a and the coil end 42a, for example. Therefore, even when the connecting terminal portion connected to the power supply is provided on the outer peripheral portion of the coil end portion 42b, interference between the connecting terminal portion and the 2 nd facing surface 82f can be suppressed. The inclination of the 2 nd facing surface 82f with respect to the front-rear direction is larger than the inclination of the 2 nd facing surface 25a with respect to the front-rear direction, for example. The length of the 2 nd facing surface 82f is smaller than the length of the 2 nd facing surface 25a, for example, when viewed in the axial direction.
The arrangement relationship of the 2 nd buckling surface 82g with respect to the 2 nd opposing surface 82f and the 2 nd opposing port 57d is the same as the arrangement relationship of the 2 nd buckling surface 25b with respect to the 2 nd opposing surface 25a and the 2 nd opposing port 57 b. The length of the 2 nd buckling surface 82g is smaller than the length of the 2 nd buckling surface 25b, for example, when viewed in the axial direction.
Bending angle of the 2 nd bending surface 82g with respect to the 2 nd opposing surface 82fIs more than 90 degrees. In this embodiment, the buckling angle +.>90 deg.. Namely, the buckling angle +>Angle of flexion with respect to the 2 nd buckling surface 25b with respect to the 2 nd opposing surface 25aThe same applies. Inclination of the 2 nd flexure surface 82g with respect to the horizontal direction +.>For example less than 90. Inclination->For example, the inclination of the 2 nd buckling face 25b with respect to the horizontal direction is +.>Is small. Angle ∈2 of corner formed by 2 nd opposing surface 82f and 2 nd buckling surface 82g>Is less than 90 degrees. In this embodiment, the angle +.>90 deg.. I.e. angle->For example, an angle of a corner formed by the 2 nd opposing surface 25a and the 2 nd buckling surface 25b>The same applies.
The arrangement relation of the boundary BP4 between the 2 nd opposing surface 82f and the 2 nd buckling surface 82g with respect to the coil end 42b is the same as the arrangement relation of the boundary BP2 between the 2 nd opposing surface 25a and the 2 nd buckling surface 25b with respect to the coil end 42 a. That is, the boundary BP4 overlaps the coil end 42b at a position radially outward of the inner edge 42e of the coil end 42b when viewed in the vertical direction. The boundary BP4 overlaps a portion of the coil end 42b that is farther radially inward (+x side) than the outer edge 42g when viewed in the vertical direction.
As shown in fig. 1, in the present embodiment, a refrigerant flow path 90 through which oil O as a refrigerant circulates is provided in a driving device 100. The refrigerant flow path 90 is provided across the inside of the motor housing 20 and the inside of the gear housing 61. The refrigerant flow path 90 is a path through which the oil O stored in the gear housing 61 is supplied to the rotary electric machine 10 and returned again to the gear housing 61. The pump 71, the cooler 72, and the refrigerant supply unit 50 are provided in the refrigerant flow path 90. The refrigerant flow path 90 includes a 1 st flow path portion 91, a 2 nd flow path portion 92, a 3 rd flow path portion 93, and a 4 th flow path portion 94.
The 1 st flow path portion 91, the 2 nd flow path portion 92, and the 3 rd flow path portion 93 are provided, for example, in a wall portion of the gear housing 61. The 4 th flow path portion 94 is provided in the cover portion 23, for example. The 1 st flow path portion 91 connects the portion of the interior of the gear housing 61 in which the oil O is stored with the pump 71. The 2 nd flow path portion 92 connects the pump 71 and the cooler 72. The 3 rd flow path portion 93 connects the cooler 72 to the inside of the refrigerant supply portion 50. In the present embodiment, the 3 rd flow path portion 93 is connected to the left end portion of the refrigerant supply portion 50. The 4 th flow path 94 connects the inside of the refrigerant supply unit 50 with the inside of the shaft 31. In the present embodiment, the 4 th flow path 94 is connected to the right end of the refrigerant supply unit 50 and the right end of the shaft 31.
When the pump 71 is driven, the oil O stored in the gear housing 61 is sucked up by the 1 st flow path portion 91, and flows into the cooler 72 by the 2 nd flow path portion 92. The oil O flowing into the cooler 72 is cooled in the cooler 72, and then flows into the refrigerant supply portion 50 through the 3 rd flow path portion 93. A part of the oil O flowing into the refrigerant supply portion 50 is injected from the supply port 50a and supplied to the stator 40. In the present embodiment, the oil O injected from the 1 st supply port 54 is supplied to the coil end portions 42a, 42b. The oil O injected from the 2 nd supply port 55 is supplied to the stator core 41.
More specifically, as shown in fig. 4, the oil O injected from the 1 st opposing port 57a is blown onto the 1 st opposing surface 24a, and flows obliquely downward toward the front side along the 1 st opposing surface 24 a. The oil O flowing along the 1 st opposing surface 24a falls downward at the boundary BP1 between the 1 st opposing surface 24a and the 1 st curved surface 24b, and is supplied to the coil end 42a. The oil O ejected from the 2 nd opposing port 57b is blown onto the 2 nd opposing surface 25a, and flows obliquely downward rearward along the 2 nd opposing surface 25 a. The oil O flowing along the 2 nd opposing surface 25a falls downward at the boundary BP2 between the 2 nd opposing surface 25a and the 2 nd buckling surface 25b, and is supplied to the coil end 42a. The oil O ejected from the 3 rd opposing port 58a is directly supplied to the coil end 42a.
As shown in fig. 5, the oil O injected from the 1 st opposing port 57c is blown onto the 1 st opposing surface 81f, and flows obliquely downward toward the front side along the 1 st opposing surface 81 f. The oil O flowing along the 1 st opposing surface 81f falls downward at the boundary BP3 between the 1 st opposing surface 81f and the 1 st curved surface 81g, and is supplied to the coil end 42b. The oil O ejected from the 2 nd opposing port 57d is blown onto the 2 nd opposing surface 82f, and flows obliquely downward rearward along the 2 nd opposing surface 82 f. The oil O flowing along the 2 nd opposing surface 82f falls downward at the boundary BP4 between the 2 nd opposing surface 82f and the 2 nd buckling surface 82g, and is supplied to the coil end 42b. The oil O ejected from the 3 rd opposing port 58b is directly supplied to the coil end 42b.
As shown in fig. 1, the other part of the oil O flowing into the refrigerant supply portion 50 flows into the shaft 31 through the 4 th flow path portion 94. A part of the oil O flowing into the shaft 31 passes through the inside of the rotor body 32 from the hole 33 and is scattered toward the stator 40. The other part of the oil O flowing into the shaft 31 is discharged from the opening on the left side of the shaft 31 into the gear housing 61, and is stored again in the gear housing 61.
The oil O supplied from the supply port 50a to the stator 40 and the oil O supplied from the inside of the shaft 31 to the stator 40 abstract heat from the stator 40. The oil O that cools the stator 40 falls downward and is accumulated in a lower region in the motor housing 20. The oil O accumulated in the lower region of the motor housing 20 is returned to the gear housing 61 through the partition wall opening 22a provided in the partition wall 22. As described above, the refrigerant flow path 90 supplies the oil O stored in the gear housing 61 to the rotor 30 and the stator 40.
For example, when the oil O is supplied only from the 3 rd opposing port 58a to the coil end 42a, at least a part of the oil O may flow downward through the gap in the coil end 42a, and the oil O may not be sufficiently spread over the portions on both sides in the front-rear direction of the coil end 42 a. The gap in the coil end 42a includes, for example, a gap between flat wires constituting the coil 42 c.
In contrast, according to the present embodiment, the 1 st guide wall portion 24 having the 1 st facing surface 24a and the 1 st curved surface 24b is provided, and the 1 st supply port 54 for supplying the oil O to the coil end 42a includes the 1 st facing port 57a opening toward the 1 st facing surface 24 a. The 1 st curved surface 24b is curved radially outward from an end portion of the 1 st opposing surface 24a on a side farther from the 1 st opposing opening 57a when viewed in the axial direction. Therefore, the oil O discharged from the 1 st opposing port 57a to the 1 st opposing surface 24a flows along the 1 st opposing surface 24a in a direction away from the 1 st opposing port 57a, and flows to the boundary BP1 between the 1 st opposing surface 24a and the 1 st curved surface 24 b. Here, since the 1 st curved surface 24b flexes radially outward with respect to the 1 st opposing surface 24a, the oil O flowing to the boundary BP1 is less likely to flow toward the 1 st curved surface 24b, and is separated from the 1 st guide wall portion 24 by its own weight and falls. That is, at the boundary BP1, the flow of the oil O on the wall surface of the 1 st guide wall portion 24 is cut off.
Here, according to the present embodiment, the boundary BP1 between the 1 st opposing surface 24a and the 1 st curved surface 24b overlaps the coil end 42a at a position radially outward of the inner edge 42d of the coil end 42a when viewed in the vertical direction. Therefore, the oil O falling at the boundary BP1 is supplied to a portion of the coil end 42a located radially outward of the inner edge 42d of the coil end 42a as viewed in the vertical direction, that is, to a front side portion of the coil end 42a in the present embodiment. Thereby, the oil O can be easily supplied sufficiently to the front side portion of the coil end 42 a. That is, the 1 st guide wall portion 24 having the 1 st facing surface 24a and the 1 st curved surface 24b can convey the oil O to a portion of the coil end 42a that is disposed relatively far to the front side from the 1 st facing port 57 a. Therefore, according to the present embodiment, the region to which the oil O is supplied in the coil end 42a can be enlarged. Therefore, the coil end 42a can be cooled appropriately, and the cooling efficiency of the coil end 42a can be improved.
In addition, according to the present embodiment, the 1 st buckling surface 24b buckles from the 1 st opposing surface 24a in a direction inclined upward in the vertical direction with respect to the horizontal direction. Therefore, the oil O flowing to the boundary BP1 on the 1 st opposing surface 24a is less likely to flow toward the 1 st curved surface 24b, and the oil O is likely to fall downward at the boundary BP 1. In other words, at the boundary BP1, the flow of the oil O on the wall surface of the 1 st guide wall portion 24 is more easily cut off. Thereby, the oil O is more easily supplied to the front side portion of the coil end 42 a. Therefore, the region of the coil end 42a to which the oil O is supplied can be further enlarged, and the cooling efficiency of the coil end 42a can be further improved.
In addition, according to the present embodiment, the 1 st curved surface 24b has a buckling angle with respect to the 1 st opposing surface 24aIs more than 90 degrees. Therefore, the 1 st curved surface 24b is easily curved from the 1 st opposing surface 24a in a direction inclined with respect to the horizontal direction. This makes it easier to drop the oil O at the boundary BP1. In addition, even if the posture of the 1 st curved surface 24b changes when the vehicle on which the driving device 100 is mounted travels on an inclined surface, the 1 st curved surface 24b is easily maintained in a state of being tilted upward from the 1 st opposing surface 24a with respect to the horizontal direction toward buckling. Therefore, even when the vehicle on which the drive device 100 is mounted travels on an inclined surface, the oil O can be appropriately dropped from the boundary BP1, and the oil O can be appropriately supplied to the front side portion of the coil end 42 a.
In addition, according to the present embodiment, the 1 st facing surface 24a is located at the lower side in the vertical direction as it is away from the 1 st facing opening 57 a. Therefore, the oil O discharged from the 1 st opposing port 57a to the 1 st opposing surface 24a easily flows on the 1 st opposing surface 24a in a direction away from the 1 st opposing port 57a due to its own weight. Therefore, the oil O can be more easily conveyed to the boundary BP1 relatively distant from the 1 st opposing port 57 a. Therefore, the region of the coil end 42a to which the oil O is supplied can be further enlarged, and the cooling efficiency of the coil end 42a can be further improved.
In addition, according to the present embodiment, the boundary BP1 between the 1 st opposing surface 24a and the 1 st curved surface 24b overlaps a portion of the coil end 42a that is radially inward of the outer edge 42f when viewed in the vertical direction. Therefore, even if the oil O that falls from the 1 st opposing surface 24a at the boundary BP1 falls not directly downward but in a direction inclined radially outward, the oil O can be prevented from falling off from the coil end 42 a.
The above-described operation and effect obtained by the 1 st guide wall portion 24 can be obtained similarly by the 1 st guide wall portion 81 having the 1 st facing surface 81f and the 1 st curved surface 81 g. That is, by providing the 1 st guide wall portion 81, the oil O can be easily supplied to the front side portion of the coil end portion 42b, and the area of the coil end portion 42b to which the oil O is supplied can be enlarged. Therefore, both the coil end 42a and the coil end 42b can be cooled appropriately.
In addition, according to the present embodiment, the 1 st guide wall portion includes the 1 st guide wall portion 24 as a part of the motor housing 20. Therefore, there is no need to provide a separate member for providing the 1 st guide wall portion 24, and an increase in the number of members of the rotary electric machine 10 can be suppressed. Therefore, an increase in the number of components of the driving device 100 can be suppressed.
In addition, according to the present embodiment, the 1 st guide wall portion includes the 1 st guide wall portion 81 fixed to the stator core 41. Therefore, by replacing the 1 st guide wall portion 81 with respect to the stator core 41, the 1 st opposing surface 81f and the 1 st curved surface 81g can be easily changed without changing other members than the 1 st guide wall portion 81.
Further, according to the present embodiment, the 2 nd guide wall portion 25 having the 2 nd facing surface 25a and the 2 nd buckling surface 25b and being spaced from the 1 st guide wall portion 24 with the refrigerant supply portion 50 therebetween when viewed in the vertical direction is provided, and the 1 st supply port 54 for supplying the oil O to the coil end 42a includes the 2 nd facing port 57b opening toward the 2 nd facing surface 25 a. The 2 nd buckling surface 25b buckles radially outward from an end portion of the 2 nd opposing surface 25a on a side farther from the 2 nd opposing port 57b when viewed in the axial direction. Therefore, the oil O discharged from the 2 nd opposing port 57b to the 2 nd opposing surface 25a flows along the 2 nd opposing surface 25a in a direction away from the 2 nd opposing port 57b, and flows to the boundary BP2 between the 2 nd opposing surface 25a and the 2 nd buckling surface 25 b. Here, since the 2 nd curved surface 25b is curved radially outward with respect to the 2 nd opposing surface 25a, the oil O flowing to the boundary BP2 is not likely to flow toward the 2 nd curved surface 25b, and is separated from the 2 nd guide wall portion 25 by its own weight and falls. That is, at the boundary BP2, the flow of the oil O on the wall surface of the 2 nd guide wall portion 25 is cut off.
Here, according to the present embodiment, the boundary BP2 between the 2 nd opposed surface 25a and the 2 nd curved surface 25b overlaps the coil end 42a at a position radially outward of the inner edge 42d of the coil end 42a when viewed in the vertical direction. Therefore, the oil O falling at the boundary BP2 is supplied to a portion of the coil end portion 42a radially outward of the inner edge 42d of the coil end portion 42a as viewed in the vertical direction, that is, to a rear side portion of the coil end portion 42a in the present embodiment. Thereby, the oil O can be easily supplied sufficiently to the rear side portion of the coil end 42 a. That is, the 2 nd guide wall portion 25 having the 2 nd facing surface 25a and the 2 nd curved surface 25b can convey the oil O to a portion of the coil end 42a that is disposed relatively far rearward from the 2 nd facing port 57 b. Therefore, according to the present embodiment, the region of the coil end 42a to which the oil O is supplied can be further enlarged. Therefore, the coil end 42a can be cooled more appropriately, and the cooling efficiency of the coil end 42a can be further improved. Further, since the oil O can be appropriately supplied to both side portions of the coil end portion 42a in the front-rear direction by the 1 st guide wall portion 24 and the 2 nd guide wall portion 25, the oil O can be easily appropriately supplied to the entire coil end portion 42 a.
The 2 nd guide wall portion 25 is different from the 1 st guide wall portion 24 in that it is reversed in the front-rear direction, but by disposing the 2 nd opposing surface 25a and the 2 nd buckling surface 25b with respect to the coil end 42a and the like in the same manner as the 1 st opposing surface 24a and the 1 st buckling surface 24b, the same operational effects as those obtained by the 1 st guide wall portion 24 described above can be obtained.
The above-described operation and effect obtained by the 2 nd guide wall portion 25 can be obtained similarly by the 2 nd guide wall portion 82 having the 2 nd facing surface 82f and the 2 nd curved surface 82 g. That is, by providing the 2 nd guide wall portion 82, the oil O can be supplied to the rear side portion of the coil end portion 42b more easily, and the area of the coil end portion 42b to which the oil O is supplied can be further enlarged. Therefore, both the coil end 42a and the coil end 42b can be cooled more appropriately.
In addition, according to the present embodiment, the coil end portions 42a, 42b include a part of the coil 42c formed by winding a flat wire. When the wire constituting the coil 42c is a flat wire, it is difficult to wind the wire, and the gap between the wires is liable to be large in the coil end portions 42a, 42b, as compared with the case where the wire constituting the coil 42c is a round wire. Therefore, in the case where the portion of the coil 42c included in the coil end portions 42a, 42b is constituted by flat wires, the oil O supplied to the coil end portions 42a, 42b may flow in the gap between the flat wires, and may be more difficult to flow in the front-rear direction. In contrast, according to the present embodiment, as described above, the oil O can easily flow to both side portions in the front-rear direction of the coil end portions 42a, 42b by the 1 st guide wall portions 24, 81 and the 2 nd guide wall portions 25, 82. Therefore, when the coil end portions 42a, 42b include a part of the coil 42c made of a flat wire, the above-described effects obtained by the 1 st guide wall portions 24, 81 and the 2 nd guide wall portions 25, 82 can be more usefully obtained.
In addition, according to the present embodiment, the 1 st supply port 54 includes a 3 rd opposing port 58 that opens to the coil end portions 42a, 42 b. Therefore, the oil O discharged from the 3 rd opposing port 58 is also easily supplied to the portions of the coil ends 42a and 42b disposed relatively close to the refrigerant supply portion 50. This makes it easier to supply the oil O to the entirety of the coil ends 42a, 42 b. Therefore, the cooling efficiency of the coil ends 42a, 42b can be further improved.
In addition, according to the present embodiment, the supply port 50a includes the 2 nd supply port 55 for supplying the oil O to the stator core 41. Therefore, the refrigerant supply portion 50 can cool not only the coil end portions 42a and 42b but also the stator core 41.
In addition, according to the present embodiment, the refrigerant supply portion 50 has a tubular shape extending in the axial direction of the center axis J. Therefore, compared with the case where the refrigerant supply portion 50 is formed by providing a hole in the wall portion of the motor case 20, for example, the refrigerant supply portion 50 can be easily formed. In addition, the refrigerant supply unit 50 is also easily removed from the motor case 20 and replaced.
The present invention is not limited to the above-described embodiments, and other configurations and other methods may be adopted within the scope of the technical idea of the present invention. The 1 st guide wall portion may be provided at any portion of the rotating electric machine. In the case where the 1 st guide wall portion is a part of the housing, the 1 st guide wall portion may be a part of the lid portion 23 of the above embodiment, for example. In this case, a 1 st guide wall portion provided as a part of the cover portion 23 is provided instead of the 1 st guide wall portion 81 described above.
In the case where the 1 st guide wall portion is provided separately from the other members, the 1 st guide wall portion may be attached to a member other than the stator core. The 1 st guide wall portion may be fixed to the motor case. For example, in the above embodiment, the 1 st guide wall 81 may be fixed to the cover 23.
The 1 st guide wall portion may be configured as the 1 st guide wall portion 281 of the rotary electric machine 210 shown in fig. 6. As shown in fig. 6, the rotary electric machine 210 has a bus bar unit 245. The bus bar unit 245 is located at an upper side of the front side portion of the stator 40. The bus bar unit 245 has a bus bar 245a and a bus bar holder 245b. That is, the rotary electric machine 210 has the bus bar 245a and the bus bar holder 245b. The bus bar 245a is electrically connected to the stator 40. Although not shown, a plurality of bus bars 245a are provided, for example. The bus bar holder 245b holds the bus bar 245a. The bus bar holder 245b is made of, for example, resin.
The 1 st guide wall portion 281 of the rotary electric machine 210 is provided, for example, in place of the 1 st guide wall portion 81 of the above embodiment. The 1 st guide wall portion 281 is provided on the bus bar holder 245b. The 1 st guide wall portion 281 extends obliquely downward from the bus bar holder 245b toward the front side. The 1 st guide wall portion 281 and the bus bar holder 245b are portions of the same single member. The single member including the 1 st guide wall portion 281 and the bus bar holder 245b is manufactured by, for example, insert molding with the bus bar 245a as an insert member.
The 1 st guide wall portion 281 has a 1 st facing surface 281f disposed to face the upper side of the coil end 42b in the vertical direction, and a 1 st buckling surface 281g buckling from the 1 st facing surface 281 f. The 1 st facing surface 281f is the same as the 1 st facing surface 81f of the above embodiment. The 1 st curved surface 281g is the same as the 1 st curved surface 81g of the above embodiment. The other structure of the rotary electric machine 210 can be the same as that of the rotary electric machine 10 of the above embodiment, for example.
According to the structure of fig. 6, the 1 st guide wall portion includes a 1 st guide wall portion 281 provided on the bus bar holder 245 b. Therefore, by assembling the bus bar holder 245b, the 1 st guide wall portion 281 can be arranged. This can reduce the man-hour for assembling the rotary electric machine 210, compared with the case where the 1 st guide wall portion 281 is required to be disposed separately. In addition, the 1 st guide wall portion 281 can be easily manufactured by insert molding the 1 st guide wall portion 281 together with the bus bar holder 245b as described above.
The 1 st guide wall portion may be provided with at least 1. That is, in the above-described embodiment, the 1 st guide wall portions 24 and 81 are provided to both the coil end portion 42a and the coil end portion 42b, but the present invention is not limited thereto. In the above embodiment, either the 1 st guide wall portion 24 or the 1 st guide wall portion 81 may not be provided.
The 1 st opposing surface of the 1 st guide wall portion may have any shape. The 1 st opposing surface may be formed by connecting a plurality of surfaces. For example, the 1 st facing surface may be constituted by a surface 20a connected to the rear side (-X side) of the 1 st facing surface 24a and the 1 st facing surface 24a in the inner peripheral surface of the motor case 20 shown in fig. 4. In this case, the 1 st opposing port 57a may be opened toward the surface 20 a. The 1 st opposing surface may be a surface extending parallel to the horizontal direction.
The 1 st buckling surface of the 1 st guide wall portion may buckle with respect to the 1 st opposing surface as long as it buckles radially outward from the 1 st opposing surface. The 1 st curved surface may be curved from the 1 st facing surface in a direction inclined downward in the vertical direction with respect to the horizontal direction, or may be parallel to the horizontal direction. The bending angle of the 1 st bending surface with respect to the 1 st opposing surface may be smaller than 90 °.
The 2 nd guide wall portion may be provided at any portion of the rotating electric machine. The 2 nd guide wall portion may be provided in the same manner as the modification of the 1 st guide wall portion. In the above embodiment, either one of the 2 nd guide wall portion 25 and the 2 nd guide wall portion 82 may not be provided. The 2 nd guide wall portion may not be provided.
The 2 nd opposing surface of the 2 nd guide wall portion may have any shape. The 2 nd facing surface may be provided in the same manner as the modification of the 1 st facing surface. The 2 nd buckling surface of the 2 nd guide wall portion may buckle with respect to the 2 nd opposing surface as long as it buckles radially outward from the 2 nd opposing surface. The 2 nd curved surface may be provided in the same manner as the modification of the 1 st curved surface described above.
The refrigerant supply portion may have a configuration having a wide portion and a cylindrical portion having a supply port. The wide portion may have any shape as long as the circumferential dimension is larger than the radial dimension. The wide portion may be a rectangular tube with a long edge arranged along the circumferential direction. The refrigerant supply portion may be entirely polygonal tubular. The refrigerant supply portion may be entirely cylindrical without having a wide portion. The refrigerant supply portion may not be tubular. The refrigerant supply portion may be a flow path provided in the casing.
The supply port of the refrigerant supply portion is not particularly limited as long as it includes at least 1 st supply port. The 1 st supply port may include at least 1 st opposed port, and other structures are not particularly limited. The 1 st supply port may not include the 2 nd opposing port, or may not include the 3 rd opposing port. The supply port of the refrigerant supply portion may not include the 2 nd supply port.
The coil end portion is not particularly limited as long as it is annular protruding from the stator core in the axial direction of the central axis. A part of the coil included in the coil end may be formed by winding a round wire.
The refrigerant flow path through which the refrigerant flows is not particularly limited. The refrigerant flow path may be configured as the refrigerant flow path 390 of the driving device 300 shown in fig. 7. As shown in fig. 7, in the refrigerant flow path 390, the 3 rd flow path portion 393 connects the cooler 72 and the 4 th flow path portion 394. The 3 rd flow path portion 393 is provided across the gear case 61 and the motor case 20, for example. The 4 th flow path portion 394 is provided in the cover portion 23 of the motor case 20 of the electric rotating machine 310. The 4 th flow path portion 394 branches into a flow path portion connecting the 3 rd flow path portion 393 and the inside of the refrigerant supply portion 350, and a flow path portion connecting the 3 rd flow path portion 393 and the inside of the shaft 31. The branched 4 th flow path portion 394 is connected to the right end of the refrigerant supply portion 350 and the right end of the shaft 31, respectively. In the structure of fig. 7, oil O flows from the right side to the left side in refrigerant supply portion 350. For example, all of the oil O flowing into the refrigerant supply portion 350 from the 4 th flow path portion 394 is supplied to the stator 40 from the supply port 50 a. Other structures of the driving device 300 are the same as those of the driving device 100 shown in fig. 1.
The refrigerant supplied from the refrigerant supply unit is not particularly limited as long as it can be supplied to the stator and cools the stator. The refrigerant may be, for example, an insulating liquid or water. In the case where the refrigerant is water, the surface of the stator may be subjected to an insulation treatment.
The rotating electric machine to which the present invention is applied is not limited to a motor, and may be a generator. The use of the rotary electric machine is not particularly limited. The rotating electric machine may be mounted on a vehicle for applications other than the application for rotating an axle, or may be mounted on equipment other than the vehicle. The posture of the rotary electric machine when the rotary electric machine is used is not particularly limited as long as the central axis of the rotary electric machine extends in a direction intersecting the vertical direction. The central axis of the rotating electric machine may extend in a direction inclined with respect to a direction perpendicular to the vertical direction. The structures described in the present specification can be appropriately combined within a range not contradicting each other.

Claims (13)

1. A rotating electrical machine, comprising:
a rotor rotatable about a central axis extending in a direction intersecting the vertical direction;
a stator located radially outward of the rotor;
A refrigerant supply unit located on the upper side of the stator in the vertical direction and having a supply port for supplying refrigerant to the stator; and
a 1 st guide wall portion located on the upper side in the vertical direction of the stator and on the lower side in the vertical direction with respect to the supply port,
the stator has:
a stator core; and
annular coil end portions protruding from the stator core in an axial direction of the central axis,
the 1 st guide wall portion has:
a 1 st opposing surface disposed to face an upper side of the coil end in the vertical direction; and
a 1 st curved surface curved from the 1 st opposite surface,
the supply port includes a 1 st supply port for supplying the refrigerant to the coil end,
the 1 st supply port includes a 1 st opposed port opening to the 1 st opposed surface,
the 1 st curved surface is curved radially outward from an end portion of the 1 st opposing surface on a side farther from the 1 st opposing opening when viewed in an axial direction of the central axis,
the boundary between the 1 st facing surface and the 1 st curved surface overlaps the coil end portion at a position outside the inner edge of the coil end portion in a direction perpendicular to the vertical direction and the central axis, as viewed in the vertical direction.
2. The rotating electrical machine according to claim 1, wherein,
the 1 st curved surface is curved from the 1 st opposing surface in a direction inclined upward in the vertical direction with respect to the horizontal direction.
3. The rotating electrical machine according to claim 1 or 2, wherein,
the 1 st buckling surface has a buckling angle of 90 ° or more with respect to the 1 st opposing surface.
4. The rotating electrical machine according to claim 1 or 2, wherein,
the 1 st opposing surface is located at a lower side in the vertical direction with distance from the 1 st opposing opening.
5. The rotating electrical machine according to claim 1 or 2, wherein,
the rotating electric machine further has a housing that houses the rotor and the stator inside,
the 1 st guide wall portion includes a 1 st guide wall portion as a part of the housing.
6. The rotating electrical machine according to claim 1 or 2, wherein,
the 1 st guide wall portion includes a 1 st guide wall portion fixed to the stator core.
7. The rotating electrical machine according to claim 1 or 2, wherein,
the rotating electrical machine further includes:
a bus bar electrically connected with the stator; and
a bus bar holder that holds the bus bar,
the 1 st guide wall portion includes a 1 st guide wall portion provided on the bus bar holder.
8. The rotating electrical machine according to claim 1 or 2, wherein,
the rotating electric machine further includes a 2 nd guide wall portion, the 2 nd guide wall portion being located on the upper side of the stator in the vertical direction, the 2 nd guide wall portion and the 1 st guide wall portion being disposed with the refrigerant supply portion interposed therebetween when viewed in the vertical direction,
the 2 nd guide wall portion has:
a 2 nd facing surface disposed to face an upper side of the coil end in the vertical direction; and
a 2 nd curved surface curved from the 2 nd opposite surface,
the 1 st supply port includes a 2 nd opposed port opening to the 2 nd opposed surface,
the 2 nd curved surface is curved radially outward from an end portion of the 2 nd opposed surface on a side farther from the 2 nd opposed port when viewed in an axial direction of the central axis,
the boundary between the 2 nd facing surface and the 2 nd curved surface overlaps the coil end portion at a position radially outward of the inner edge of the coil end portion when viewed in the vertical direction.
9. The rotating electrical machine according to claim 1 or 2, wherein,
the coil end includes a part of a coil formed by winding a flat wire.
10. The rotating electrical machine according to claim 1 or 2, wherein,
The 1 st supply port includes a 3 rd opposing port opening toward the coil end.
11. The rotating electrical machine according to claim 1 or 2, wherein,
the supply port includes a 2 nd supply port for supplying the refrigerant to the stator core.
12. The rotating electrical machine according to claim 1 or 2, wherein,
the refrigerant supply portion has a tubular shape extending in an axial direction of the central axis.
13. A driving device mounted on a vehicle for rotating an axle,
the driving device comprises:
the rotary electric machine according to any one of claims 1 to 12; and
and a transmission device connected to the rotating electrical machine and transmitting rotation of the rotor to the axle.
CN202111360051.1A 2020-11-19 2021-11-17 Rotating electrical machine and driving device Active CN114552891B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011179646A (en) * 2010-03-03 2011-09-15 Toyota Motor Corp Cooling structure of rotary electric machine
JP2011193642A (en) * 2010-03-15 2011-09-29 Toyota Motor Corp Cooling structure of rotary electric machine
CN103119830A (en) * 2010-11-22 2013-05-22 爱信艾达株式会社 Stator cooling apparatus
JP2014054108A (en) * 2012-09-07 2014-03-20 Honda Motor Co Ltd Cooling structure of dynamo-electric machine
CN109962575A (en) * 2017-12-15 2019-07-02 本田技研工业株式会社 Rotating electric machine
JP2019126133A (en) * 2018-01-15 2019-07-25 本田技研工業株式会社 Rotary electric machine
WO2019156196A1 (en) * 2018-02-08 2019-08-15 Ntn株式会社 Lubricant supply structure and in-wheel motor drive device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011179646A (en) * 2010-03-03 2011-09-15 Toyota Motor Corp Cooling structure of rotary electric machine
JP2011193642A (en) * 2010-03-15 2011-09-29 Toyota Motor Corp Cooling structure of rotary electric machine
CN103119830A (en) * 2010-11-22 2013-05-22 爱信艾达株式会社 Stator cooling apparatus
JP2014054108A (en) * 2012-09-07 2014-03-20 Honda Motor Co Ltd Cooling structure of dynamo-electric machine
CN109962575A (en) * 2017-12-15 2019-07-02 本田技研工业株式会社 Rotating electric machine
JP2019126133A (en) * 2018-01-15 2019-07-25 本田技研工業株式会社 Rotary electric machine
WO2019156196A1 (en) * 2018-02-08 2019-08-15 Ntn株式会社 Lubricant supply structure and in-wheel motor drive device

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