WO2019189460A1 - Motor unit - Google Patents

Motor unit Download PDF

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Publication number
WO2019189460A1
WO2019189460A1 PCT/JP2019/013357 JP2019013357W WO2019189460A1 WO 2019189460 A1 WO2019189460 A1 WO 2019189460A1 JP 2019013357 W JP2019013357 W JP 2019013357W WO 2019189460 A1 WO2019189460 A1 WO 2019189460A1
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WO
WIPO (PCT)
Prior art keywords
oil
oil passage
motor
shaft
generator
Prior art date
Application number
PCT/JP2019/013357
Other languages
French (fr)
Japanese (ja)
Inventor
山口　康夫
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201980022640.3A priority Critical patent/CN111918785B/en
Publication of WO2019189460A1 publication Critical patent/WO2019189460A1/en

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B60K6/405—Housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • 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
    • Y02T10/62—Hybrid vehicles
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Definitions

  • the present invention relates to a motor unit.
  • the power train of a hybrid vehicle is configured by connecting an engine to a motor unit having a traveling motor, a generator for power generation, and a transmission mechanism for transmitting power.
  • a motor unit having a traveling motor, a generator for power generation, and a transmission mechanism for transmitting power.
  • the motor and the generator generate heat and become high temperature.
  • Patent Document 1 describes a structure in which a motor and a generator are cooled by a common cooling device.
  • One aspect of the present invention is to provide a motor unit capable of simultaneously cooling the motor and the generator and simplifying the overall structure.
  • One aspect of the motor unit of the present invention is a motor unit connected to an engine, and includes a generator having a first shaft that rotates around a first rotation shaft by the power of the engine, and a second rotation A motor having a second shaft that rotates about an axis; a transmission mechanism that transmits force between the engine, the generator, and the motor; and outputs the power of the engine and the motor to the outside; and the generator And a housing having a housing portion for housing the motor, oil accumulated in a lower region of the housing portion, a first pump portion located inside the housing portion and driven by rotation of the first shaft, Is provided.
  • the generator includes a first rotor having the first shaft, and a first stator surrounding the first rotor from a radially outer side of the first rotating shaft.
  • the motor includes a second rotor having the second shaft, and a second stator that surrounds the second rotor from a radially outer side of the second rotating shaft.
  • the accommodating portion is provided with an oil passage for circulating the oil.
  • a cooler for cooling the oil passing through the oil passage is provided in the passage of the oil passage.
  • the oil passage includes a first oil passage.
  • the first oil passage is connected to a first suction oil passage connected from the lower region of the housing portion to the first pump portion, and a discharge port of the first pump portion, along the first rotation axis.
  • a first in-shaft oil passage extending through the first shaft and a first in-diameter oil extending radially outward from the first in-shaft oil passage and supplying oil to the first stator.
  • a motor supply oil passage that extends from the discharge port of the first pump unit toward the motor and supplies oil to the motor.
  • a motor unit capable of simultaneously cooling a motor and a generator and simplifying the entire structure is provided.
  • FIG. 1 is a conceptual diagram of a power train having a motor unit according to an embodiment.
  • FIG. 2 is a schematic cross-sectional view of a motor unit according to an embodiment.
  • FIG. 3 is a cross-sectional view of a generator according to an embodiment.
  • FIG. 4 is a cross-sectional view of a motor according to an embodiment.
  • Drawing 5 is a figure which looked at the 2nd pump part of one embodiment from the other side in the direction of an axis.
  • FIG. 3 is a cross-sectional view illustrating a part of the motor according to the embodiment.
  • the direction of gravity is defined and described based on the positional relationship when the motor unit 8 is mounted on a vehicle located on a horizontal road surface.
  • “extending along the axial direction” means not only extending in the axial direction (that is, the direction parallel to the X axis) but also tilting in a range of less than 45 ° with respect to the axial direction. This includes cases extending in the other direction.
  • “extending along the axis” means extending in the axial direction around a predetermined axis.
  • extending in the radial direction means strictly in the range of less than 45 ° with respect to the radial direction in addition to the case of extending in the radial direction, that is, the direction perpendicular to the axial direction. Including the case of extending in an inclined direction.
  • the Z-axis direction shown in each figure is a vertical direction Z in which the positive side is the upper side and the negative side is the lower side.
  • the vertical direction Z is the vertical direction of each figure.
  • the upper side in the vertical direction is simply referred to as “upper side”
  • the lower side in the vertical direction is simply referred to as “lower side”.
  • FIG. 1 is a conceptual diagram of a power train 1 having a motor unit 8 according to an embodiment.
  • FIG. 2 is a schematic cross-sectional view of the motor unit 8. *
  • the power train 1 is mounted on a vehicle using the motor 2 and the engine 9 as power sources, such as a hybrid vehicle (HEV) and a plug-in hybrid vehicle (PHV).
  • HEV hybrid vehicle
  • PSV plug-in hybrid vehicle
  • EV mode For a vehicle (not shown) on which the powertrain 1 is mounted, three types of travel modes are prepared: EV mode, series mode, and parallel mode. These travel modes are alternatively selected by an electronic control unit (not shown) according to the vehicle state, the travel state, the driver's requested output, and the like. *
  • the powertrain 1 has a motor unit 8 and an engine 9.
  • the motor unit 8 is connected to the engine 9.
  • the motor unit 8 includes a motor 2, a generator 3, a transmission mechanism (transaxle) 4, a housing 10, an oil O, a first pump unit 340, a second pump unit 40, and a cooler 5. . *
  • the housing 10 includes a housing portion 19 that houses the motor 2, the generator 3, the transmission mechanism 4, the first pump portion 340, and the second pump portion 40.
  • oil O is stored in the accommodating portion 19.
  • the oil O is stored in the lower region of the storage unit 19.
  • the “lower region” of a predetermined space includes a portion located below the center in the vertical direction of the corresponding space.
  • the accommodating portion 19 includes a motor chamber 19A that accommodates the motor 2, a generator chamber 19B that accommodates the generator 3, and a gear chamber 19C that accommodates the transmission mechanism 4.
  • the motor chamber 19A, the generator chamber 19B, and the gear chamber 19C are partitioned from each other by partition walls (first partition wall 18A and second partition wall 18B). That is, the housing is provided with a first partition (partition) 18A and a second partition 18B.
  • the oil O in the accommodating portion 19 circulates in the motor chamber 19A and the generator chamber 19B. That is, in this embodiment, the oil O does not flow into the gear chamber 19C. Note that gear lubrication oil may be separately stored in the gear chamber 19C.
  • the generator room 19B is located below the motor room 19A. That is, the generator room 19 ⁇ / b> B is located on the lowermost side in the housing portion 19.
  • the oil in the accommodating part 19 is stored in the lower region of the generator room 19B.
  • the lower region of the accommodating portion 19 means the lower region of the generator room 19B.
  • the liquid level height of the oil O accumulated in the lower region of the generator chamber 19B changes vertically as the oil O circulates.
  • the lower limit height of the liquid level of the oil O accumulated in the lower region of the generator chamber 19 ⁇ / b> B is located above the lower end portion of the first stator 330 of the generator 3. Accordingly, the first stator 330 can be cooled by the oil O accumulated in the lower region of the generator chamber 19B.
  • the upper limit height of the liquid level of the oil O accumulated in the lower region of the generator chamber 19 ⁇ / b> B is located below the lower end portion of the first rotor 320 of the generator 3. Thereby, it can suppress that the oil O which accumulates in the lower area
  • the motor chamber 19A and the generator chamber 19B are disposed adjacent to each other in the vertical direction.
  • the motor chamber 19A is disposed above the generator chamber 19B.
  • the motor chamber 19A and the generator chamber 19B are partitioned by the first partition wall 18A.
  • the first partition wall 18A is provided with an oil introduction port 18a penetrating in the vertical direction.
  • the motor chamber 19A and the gear chamber 19C are disposed adjacent to each other in the horizontal direction.
  • the motor chamber 19A and the gear chamber 19C are partitioned by the second partition wall 18B. *
  • the accommodating portion 19 is provided with an oil passage 90 through which the oil O is circulated.
  • the oil passage 90 includes a first oil passage 91 and a second oil passage 95.
  • a cooler 5 for cooling the oil O passing through the oil passage 90 is provided in the oil passage 90. *
  • the cooler 5 is provided in the path of the first oil path 91.
  • the cooler 5 cools the oil O that passes through the first oil passage 91. Further, as will be described later, the first oil passage 91 and the second oil passage 95 merge in the lower region of the accommodating portion 19. Therefore, the oil O that has passed through the first oil passage 91 cooled by the cooler 5 is mixed with the oil O that has passed through the second oil passage 95 in the lower region of the housing portion 19. Therefore, the cooler 5 can cool all the oil O in the oil passage 90.
  • the cooler 5 is fixed to the outer peripheral surface of the housing 10.
  • the cooler 5 is fixed to the outer peripheral surface of the generator housing main body 311 surrounding the generator chamber 19 ⁇ / b> B in the housing 10.
  • the cooler 5 has an installation surface 5a orthogonal to the radial direction of the first rotation axis J1.
  • the cooler 5 is in contact with the outer peripheral surface of the housing 10 on the installation surface 5a.
  • the installation surface 5 a faces the generator 3 through the wall portion of the housing 10. For this reason, the cooler 5 can cool the generator 3 through the wall portion of the housing 10. *
  • the lower end portion of the installation surface 5 a of the cooler 5 is located below the lower end portion of the first rotor 320 of the generator 3.
  • the liquid level height of the oil O accumulated in the lower region of the generator chamber 19 ⁇ / b> B changes up and down on the lower side of the first rotor 320.
  • the oil O accumulated in the lower region of the generator chamber 19B is cooled via the installation surface 5a of the cooler 5, and the first stator 330 of the generator 3 is effectively effective via the oil O. Can be cooled.
  • the generator 3 is a motor generator having both a function as a motor and a function as a generator.
  • the generator 3 functions as an electric motor (starter) when starting the engine 9, and generates power with engine power when the engine 9 is operated.
  • the generator 3 generates power using the power of the engine 9.
  • the generator 3 includes a first rotor 320 and a first stator 330 that surrounds the first rotor 320.
  • the first rotor 320 is rotatable about the first rotation axis J1.
  • the first rotor 320 has a first shaft 320a. That is, the generator 3 has a first shaft 320a that rotates around the first rotation axis J1.
  • a first pump unit 340 is provided at the end of the first shaft 320a. The other end of the first shaft 320a is connected to a crankshaft (not shown) of the engine 9. For this reason, the first shaft 320 a is rotated by the power of the engine 9. *
  • the first stator 330 is annular.
  • the first stator 330 surrounds the first rotor 320 from the outside in the radial direction of the first rotation axis J1. *
  • the first pump unit 340 is located inside the storage unit 19.
  • the first pump unit 340 is located on one axial side of the first rotating shaft J1 with respect to the generator 3.
  • the first pump unit 340 is driven by the rotation of the first shaft 320a.
  • the first shaft 320 a is rotated by the engine 9.
  • the first pump unit 340 is driven by the engine 9.
  • the 1st pump part 340 of this embodiment is a trochoidal pump.
  • the motor 2 is located above the generator 3.
  • the motor 2 is a motor generator that has both a function as a motor and a function as a generator.
  • the motor 2 mainly functions as an electric motor to drive the vehicle, and functions as a generator during regeneration. *
  • the motor 2 has a second rotor 20 and a second stator 30.
  • the second rotor 20 can rotate around the second rotation axis J2.
  • the second rotation axis J2 extends in parallel with the first rotation axis J1.
  • the second rotor 20 has a second shaft 20a. That is, the motor 2 has a second shaft 20a that rotates around the second rotation axis J2.
  • a second pump unit 40 is provided at one end of the second shaft 20a.
  • the other end of the second shaft 20 a is connected to the transmission mechanism 4.
  • the power of the motor 2 is output to the outside via the transmission mechanism 4. *
  • the second stator 30 is annular.
  • the second stator 30 surrounds the second rotor 20 from the outside in the radial direction of the second rotation axis J2. *
  • the second pump unit 40 is located inside the storage unit 19. Further, the second pump unit 40 is located on one axial side of the second rotating shaft J2 with respect to the motor 2. The second pump unit 40 is driven by the rotation of the second shaft 20a. That is, the second pump unit 40 is driven by the motor 2. Similar to the first pump unit 340, the second pump unit 40 of the present embodiment is a trochoidal pump. *
  • the transmission mechanism 4 transmits force between the engine 9, the generator 3 and the motor 2.
  • the transmission mechanism 4 incorporates a plurality of mechanisms responsible for power transmission between the drive source and the driven device.
  • the transmission mechanism 4 outputs the power of the engine 9 and the motor 2 to the outside.
  • the transmission mechanism 4 includes, for example, a clutch mechanism (not shown), a plurality of gears (not shown), a differential gear (not shown), and an output shaft (not shown).
  • the transmission mechanism 4 transmits the power of the engine 9 and the power of the motor 2 to the differential gear through a plurality of gears.
  • the differential gear is a device for transmitting torque output from the motor 2 and the engine 9 to the wheels of the vehicle.
  • the differential device transmits the same torque to the output shafts of the left and right wheels while absorbing the speed difference between the left and right wheels when the vehicle turns.
  • the clutch mechanism cuts the power transmission path of the engine 9 when the vehicle is driven only by the power of the motor 2.
  • the clutch mechanism connects the power transmission path of the engine 9 when the vehicle travels using both the power of the motor 2 and the power of the engine 9. *
  • the oil passage 90 includes the first oil passage 91 and the second oil passage 95.
  • the first oil passage 91 and the second oil passage 95 are oil passages for cooling both the motor 2 and the generator 3, respectively.
  • the first oil passage 91 includes a first suction oil passage 92, a first in-shaft oil passage 93 ⁇ / b> A, a first radial oil passage 93 ⁇ / b> B, and a motor supply oil passage 94.
  • the first siphoning oil path 92 is provided, for example, inside the peripheral wall portion of the housing 10.
  • the first suction oil passage 92 is connected to the first pump unit 340 from the lower region of the housing unit 19. As described above, the oil O accumulates in the lower region of the accommodating portion 19 (more specifically, the lower region of the generator chamber 19B).
  • the first siphoning oil passage 92 opens in the lower region of the generator chamber 19B at the upstream end.
  • the first suction oil passage 92 is connected to the first pump unit 340 at the downstream end. A negative pressure is applied to the downstream end of the first suction oil passage 92 from the first pump unit 340.
  • the oil O sucked up by the first pump unit 340 flows from the lower region of the housing part 19 through the first suction oil path 92. *
  • a cooler 5 is provided in the path of the first suction oil path 92.
  • the cooler 5 cools the oil O that passes through the first suction oil passage 92.
  • the first in-shaft oil passage 93A extends inside the first shaft 320a along the first rotation axis J1.
  • the first shaft 320a is a hollow shaft.
  • the first shaft oil passage 93A is an oil passage provided in a hollow portion of the first shaft 320a.
  • the hollow portion of the first shaft 320a opens on one side in the axial direction of the first rotation axis J1.
  • the first in-shaft oil passage 93A is closed on the other side in the other axial direction.
  • the opening of the hollow portion of the first shaft 320a is located at the upstream end of the first shaft oil passage 93A.
  • the opening of the hollow portion of the first shaft 320 a is connected to the discharge port 345 of the first pump unit 340.
  • the oil O flows from one axial side of the first in-shaft oil passage 93A toward the other side.
  • the first radial oil passage 93B is connected to the first in-shaft oil passage 93A.
  • the first radial oil passage 93B extends radially outward from the first shaft oil passage 93A.
  • the first radial oil passage 93B is provided in the first rotor 320 including the first shaft 320a.
  • Oil O flows from the first in-shaft oil passage 93A into the first radial oil passage 93B.
  • the first rotor 320 rotates around the first rotation axis J1. For this reason, centrifugal force is generated in the oil O in the first radial oil passage 93B toward the radially outer side. As a result, the oil O in the first radial oil passage 93B flows smoothly outward in the radial direction.
  • the first radial oil passage 93B opens toward the first stator 330 at the radially outer end of the first rotating shaft J1.
  • the first radial oil passage 93 ⁇ / b> B supplies oil O to the first stator 330 of the generator 3.
  • the oil O supplied to the first stator 330 cools the first stator 330 and further drops downward through the coil of the first stator 330 and the like. As a result, the oil O is recovered in the lower region of the generator chamber 19B.
  • the oil O can be supplied into the generator 3 by the first in-shaft oil passage 93A and the first radial oil passage 93B, and the generator 3 can be cooled from the inside. Thereby, the generator 3 can be cooled efficiently.
  • the motor supply oil passage 94 is provided, for example, inside the peripheral wall portion of the housing 10.
  • the motor supply oil passage 94 extends from the discharge port 345 of the first pump unit 340 toward the motor 2.
  • the motor supply oil passage 94 is connected to the discharge port 345 of the first pump unit 340 at the upstream end. That is, the first oil passage 91 is branched into the first in-shaft oil passage 93 ⁇ / b> A and the motor supply oil passage 94 at the discharge port 345 of the first pump unit 340.
  • the oil O can be supplied to the motor 2 while the oil O is supplied into the generator 3 by the first pump unit 340. For this reason, the generator 3 and the motor 2 can be simultaneously cooled using the first pump unit 340.
  • the cooler 5 is provided in the path of the first siphoning oil path 92.
  • the first oil passage 91 branches downstream of the first suction oil passage 92 and supplies oil O to the generator 3 and the motor 2.
  • the generator 3 and the motor 2 can be efficiently cooled by the oil O cooled by the cooler 5 by arranging the cooler 5 on the upstream side of the branch.
  • the motor supply oil passage 94 opens above the motor 2 at the downstream end.
  • the motor supply oil passage 94 supplies oil O from the upper side of the motor 2 to the second stator 30 of the motor 2.
  • the oil O supplied to the motor 2 travels along the surface of the motor 2 and cools the entire motor 2. That is, according to the present embodiment, the motor supply oil passage 94 supplies the oil O from the upper side of the motor 2 to the motor 2 so that the entire motor 2 can be efficiently cooled.
  • the first pump unit 340 is provided inside the housing unit 19, the first pump unit 340 and the motor unit 8 are compared with the case where the pump unit is provided outside the motor unit. No piping is required to connect That is, according to this embodiment, the structure of the motor unit 8 can be simplified.
  • the first pump unit 340 is driven by the rotation of the first shaft 320a, compared with the case where the pump unit is driven by an external power source, the electricity connected to the first pump unit 340 is connected. No wiring is required. That is, according to this embodiment, the structure of the motor unit 8 can be simplified.
  • the first pump unit 340 since the first pump unit 340 is driven by the rotation of the first shaft 320a of the generator 3, the first pump unit 340 is driven only when the generator 3 generates power.
  • the first pump unit 340 supplies oil O to the inside of the generator 3 to cool the generator 3.
  • the generator 3 generates heat when the generator 3 generates power. That is, according to the present embodiment, the generator 3 is driven only when the generator 3 generates heat, and the oil O for cooling the generator 3 is supplied to the generator 3. Therefore, the generator 3 can be efficiently cooled.
  • the motor 2 In general, in a hybrid vehicle, the motor 2 is always driven when the generator 3 generates power. According to the present embodiment, the motor 2 can be cooled simultaneously when the generator 3 is driven, and the motor 2 can be efficiently cooled. *
  • the second oil passage 95 includes a second suction oil passage 96, a second shaft oil passage 97A, and a second radial oil passage 97B.
  • the second siphoning oil passage 96 is provided, for example, inside the peripheral wall portion of the housing 10.
  • the second suction oil passage 96 is connected to the second pump unit 40 from the lower region of the housing unit 19.
  • the second suction oil passage 96 opens to the lower region of the generator chamber 19B at the upstream end.
  • the second suction oil passage 96 is connected to the second pump unit 40 at the downstream end.
  • a negative pressure is applied from the second pump unit 40 to the downstream end of the second suction oil passage 96.
  • the oil O sucked up by the second pump unit 40 flows from the lower region of the storage unit 19 through the second suction oil passage 96. *
  • the second shaft oil passage 97A extends inside the second shaft 20a along the second rotation axis J2.
  • the second shaft 20a is a hollow shaft.
  • the second shaft internal oil passage 97A is an oil passage provided in a hollow portion of the second shaft 20a.
  • the hollow portion of the second shaft 20a opens on one side in the axial direction of the second rotation axis J2.
  • the second shaft internal oil passage 97A is closed on the other side in the other axial direction.
  • the opening of the hollow portion of the second shaft 20a is located at the upstream end of the second in-shaft oil passage 97A.
  • the opening of the hollow portion of the second shaft 20 a is connected to the discharge port 45 of the second pump unit 40.
  • the oil O flows from one axial side of the second shaft oil passage 97A toward the other side.
  • the second radial oil passage 97B is connected to the second in-shaft oil passage 97A.
  • the second radial oil passage 97B extends radially outward from the second shaft oil passage 97A.
  • the second radial oil passage 97B is provided in the second rotor 20 including the second shaft 20a.
  • Oil O flows from the second shaft oil passage 97A into the second radial oil passage 97B.
  • the second rotor 20 rotates around the second rotation axis J2. For this reason, centrifugal force is generated in the oil O in the second radial oil passage 97B toward the radially outer side. Thereby, the oil O in the second radial oil passage 97B flows smoothly outward in the radial direction.
  • the second radial oil passage 97B opens toward the second stator 30 at the radially outer end of the second rotating shaft J2.
  • the second radial oil passage 97 ⁇ / b> B supplies oil O to the second stator 30 of the motor 2. As a result, the second stator 30 of the motor 2 is cooled.
  • the oil O can be supplied to the inside of the motor 2 by the second in-shaft oil passage 97A and the second radial oil passage 97B, and the motor 2 can be cooled from the inside. Thereby, the motor 2 can be cooled efficiently.
  • the second pump unit 40 is provided inside the housing unit 19, the second pump unit 40 and the motor unit 8 are compared with the case where the pump unit is provided outside the motor unit. No piping is required to connect That is, according to this embodiment, the structure of the motor unit 8 can be simplified.
  • the second pump unit 40 is driven by the rotation of the second shaft 20a, compared with the case where the pump unit is driven by an external power source, the electric connected to the second pump unit 40 is achieved. No wiring is required. That is, according to this embodiment, the structure of the motor unit 8 can be simplified.
  • the second pump unit 40 since the second pump unit 40 is driven by the rotation of the second shaft 20 a of the motor 2, the second pump unit 40 is driven simultaneously with the driving of the motor 2.
  • the second pump unit 40 supplies oil O to the inside of the motor 2 to cool the generator 3.
  • the motor 2 generates heat when the motor 2 is driven. That is, according to the present embodiment, the motor 2 is driven only when the motor 2 generates heat and the oil O for cooling the motor 2 is supplied to the motor 2, so that the motor 2 can be efficiently cooled.
  • the oil O supplied to the second stator 30 cools the second stator 30 and further drops down through the coil of the second stator 30 and the like.
  • the oil O dropped from the second stator 30 reaches the lower region of the motor chamber 19A.
  • the housing 10 is provided with a first partition wall 18A that partitions the motor chamber 19A and the generator chamber 19B.
  • the first partition wall 18A is provided with an oil inlet 18a penetrating in the vertical direction.
  • the oil O reaching the lower region of the motor chamber 19A is introduced into the generator chamber 19B through the oil introduction port 18a.
  • the oil introduction port 18 a is opened immediately above the generator 3. For this reason, the oil O introduced into the generator chamber 19 ⁇ / b> B via the oil introduction port 18 a is supplied to the first stator 330 of the generator 3.
  • the oil O supplied to the first stator 330 cools the first stator 330 and further drops downward through the coil of the first stator 330 and the like. As a result, the oil O is recovered in the lower
  • the motor 2 is positioned above the generator 3, and the oil O dripped from the motor 2 is supplied to the generator 3. For this reason, the oil O which cooled the motor 2 can be further used for cooling the generator 3, and as a result, efficient cooling becomes possible.
  • the generator 3 of the present embodiment includes a housing 10, a first rotor 320 having a first shaft 320 a disposed along a first rotation axis J ⁇ b> 1 extending in one direction, A rotation detection unit 380, a first stator 330, a first pump unit 340, and bearings 370 and 371 are provided.
  • the first rotation axis J1 extends in the left-right direction in FIG.
  • the direction parallel to the axial direction of the first rotation axis J1 is simply referred to as “axial direction”
  • the radial direction around the first rotation axis J1 is simply “radial direction”.
  • the circumferential direction around the first rotation axis J1 is simply referred to as “circumferential direction”.
  • the left side of FIG. 3 in the axial direction is referred to as “one axial side”
  • the right side of FIG. 3 in the axial direction is referred to as “the other axial side”. *
  • the housing 10 includes a generator housing body 311, an inner lid portion 312, and an outer lid portion 313.
  • the generator housing main body 311, the inner lid 312, and the outer lid 313 are separate members.
  • the generator housing body 311 has a bottomed cylindrical shape that opens to one side in the axial direction.
  • the generator housing main body 311 has a bottom 311a, a main body cylinder 311b, and a bearing holding portion 311c.
  • the bottom 311a has an annular plate shape that expands in the radial direction.
  • the main body cylinder portion 311b has a cylindrical shape extending from the radially outer edge portion of the bottom portion 311a to one side in the axial direction.
  • the bearing holding portion 311c has a cylindrical shape protruding from the inner edge portion of the bottom portion 311a to one side in the axial direction.
  • the bearing holding portion 311c holds the bearing 371 on the inner peripheral surface.
  • the inner lid 312 is attached to one side in the axial direction of the generator housing main body 311.
  • the inner lid portion 312 includes an annular plate portion 312a, an outer cylinder portion 312b, an inner cylinder portion 312c, and a bearing holding portion 312e.
  • the annular plate portion 312a has an annular plate shape that expands in the radial direction.
  • the inner lid portion 312 covers one side in the axial direction of the first stator 330 by the annular plate portion 312a.
  • the annular plate portion 312a has an opening 312f that penetrates the annular plate portion 312a in the axial direction at the lower end.
  • the opening 312 f is connected to the inside of the housing 10. *
  • the outer cylinder portion 312b has a cylindrical shape extending from the radially outer edge portion of the annular plate portion 312a to the other side in the axial direction.
  • the end portion on the other side in the axial direction of the outer tube portion 312b is fixed in contact with the end portion on the one side in the axial direction of the main body tube portion 311b.
  • the inner cylinder portion 312c has a cylindrical shape extending from the radially inner edge of the annular plate portion 312a to the other side in the axial direction.
  • the bearing holding portion 312e includes an annular portion 401 that extends radially inward from the other axial end of the inner cylindrical portion 312c, and a cylindrical portion 402 that protrudes from the radially inner edge of the annular portion toward the other axial end. And have.
  • the inner lid portion 312 has a second concave portion 312g that is recessed from the surface on one side in the axial direction of the inner lid portion 312 to the other side in the axial direction.
  • the inner surface of the second recess 312g includes the inner peripheral surface of the inner cylinder portion 312c and the surface on the one axial side of the annular portion 401.
  • the surface on the one side in the axial direction of the inner lid portion 312 is the surface on the one side in the axial direction of the annular portion 401 in the present embodiment.
  • the inner side surface of the second recess 312g includes a radially inner side surface of the inner cylindrical portion 312c and a surface on one axial side of the annular portion 401.
  • the cylindrical portion 402 of the bearing holding portion 312e has a cylindrical shape that protrudes from the radially inner end edge of the annular portion 401 to the other side in the axial direction.
  • the bearing holding portion 312 e holds the bearing 370 on the inner peripheral surface of the cylindrical portion 402.
  • the housing 10 has a generator housing portion 314 including a generator housing body 311 and an inner lid portion 312. Inside the generator housing 314, a generator room 19B (see FIG. 1) is configured.
  • the generator housing part 314 houses the first rotor 320 and the first stator 330.
  • the first stator 330 is fixed to the inner surface of the generator housing main body 311.
  • the first rotor 320 is disposed on the radially inner side of the first stator 330.
  • the first stator 330 faces the first rotor 320 via a gap in the radial direction.
  • the first stator 330 has a stator core 331 and a plurality of coils 332 attached to the stator core 331.
  • the stator core 331 has an annular shape around the first rotation axis J1.
  • the outer peripheral surface of the stator core 331 is fixed to the inner peripheral surface of the main body cylinder portion 311b.
  • the stator core 331 is opposed to a radially outer side of a rotor core 322, which will be described later, via a gap.
  • the coil 332 protrudes on the one axial side and the other axial side of the stator core 331.
  • the liquid level OS of the oil O stored in the generator housing unit 314 is located above the opening 312 f. Thereby, the oil O stored in the generator accommodating part 314 always flows through the opening 312f.
  • the liquid level OS of the oil O varies as the oil O is sucked up by the first pump unit 340, but is disposed below the first rotor 320 at least when the first rotor 320 rotates. . Thereby, when the 1st rotor 320 rotates, it can suppress that oil O becomes rotational resistance of the 1st rotor 320.
  • the outer lid portion 313 is attached to one side of the inner lid portion 312 in the axial direction.
  • the outer lid part 313 includes an outer lid body part 313a and a plug part 313b.
  • the outer lid main body 313a expands in the radial direction.
  • the outer lid main body portion 313a includes a lid plate portion 313c and a protruding portion 313d.
  • the lid plate portion 313c has a disk shape that expands in the radial direction.
  • the radially outer edge portion of the lid plate portion 313c is fixed to the radially outer edge portion of the annular plate portion 312a.
  • the surface on the other side in the axial direction of the cover plate portion 313c is in contact with the surface on the one side in the axial direction of the annular plate portion 312a.
  • the protruding portion 313d protrudes from the center portion of the lid plate portion 313c to the other side in the axial direction.
  • the protruding portion 313d is inserted into the inner cylinder portion 312c from one side in the axial direction.
  • the protruding portion 313d is disposed at an interval on one side in the axial direction of the annular portion 401 of the bearing holding portion 312e.
  • the outer lid main body 313a includes a first recess 313e and a second through hole 313f.
  • the first recess 313e is recessed from the surface on the one axial side of the outer lid main body 313a to the other axial side.
  • the first recess 313e is provided at the center of the outer lid main body 313a, and is provided across the lid plate 313c and the protrusion 313d.
  • the second through hole 313f penetrates from the bottom surface of the first recess 313e to the surface on the other axial side of the protruding portion 313d. That is, the second through hole 313 f penetrates from the bottom surface of the first recess 313 e to the inside of the housing 10.
  • the second through hole 313f opens inside the second recess 312g. Thereby, the 2nd penetration hole 313f connects the inside of the 1st crevice 313e and the inside of the 2nd crevice 12g.
  • the first rotation axis J1 passes through the second through hole 313f.
  • the plug portion 313b is fitted into the first recess 313e and fixed to the outer lid main body portion 313a.
  • the plug body portion 313b closes the opening on the one axial side of the first recess 313e.
  • the plug body portion 313b covers one side in the axial direction of the first shaft 320a. That is, the outer lid portion 313 covers one side in the axial direction of the first shaft 320a.
  • the plug portion 313b has a flange portion 313g that protrudes radially outward at an end portion on one axial side.
  • the flange portion 313g contacts the surface on one side in the axial direction of the lid plate portion 313c.
  • the plug body portion 313b is positioned in the axial direction by the flange portion 313g. *
  • an internal gear 343 and an external gear 342 are accommodated between the outer lid main body portion 313a and the plug body portion 313b.
  • a portion that accommodates the external gear 342 and the internal gear 343 in the outer lid portion 313 constitutes the first pump portion 340.
  • the first pump unit 340 is a trochoid pump.
  • the 1st pump part 340 has the structure substantially the same as the 2nd pump part 40 demonstrated in a back
  • a cylindrical mounting member 350 that connects the first pump portion 340 and the oil passage in the first shaft 320a is inserted into the through hole of the external gear 342.
  • the plug body portion 313b has a suction side oil passage 340a and a discharge side oil passage 340b.
  • the suction side oil passage 340 a connects the opening 312 f and the suction port of the first pump portion 340 via a first suction oil passage 92 (see FIG. 1) provided in the outer lid portion 313.
  • the discharge-side oil passage 340 b connects the discharge port 345 of the first pump unit 340 and the through hole of the attachment member 350.
  • the first rotor 320 includes a first shaft 320a, a rotor core 322, a first end plate 324, and a second end plate 325.
  • the first shaft 320a includes a shaft main body 321a, a rotor core holding part 321b, a connection part 321c, and an attachment member 350.
  • the shaft main body portion 321a, the rotor core holding portion 321b, and the connection portion 321c are a single member.
  • the shaft main body 321a has a cylindrical shape that extends in the axial direction with the first rotation axis J1 as the center.
  • the rotor core holding part 321b has a cylindrical shape centering on the first rotation axis J1 and surrounding the radially outer side of the shaft main body part 321a.
  • the axial length of the rotor core holding portion 321b is shorter than the axial length of the shaft main body portion 321a.
  • the connecting portion 321c extends in an annular shape from the axial center to the radial outer side of the shaft main body 321a.
  • the rotor core holding part 321b is connected in the radial direction.
  • the axial length of the connecting portion 321c is shorter than the axial length of the shaft main body portion 321a and the axial length of the rotor core holding portion 321b. Therefore, the outer peripheral surface 501a of the shaft main body 321a and the inner peripheral surface 501b of the rotor core holding portion 321b face each other in the radial direction on one axial side of the connecting portion 321c. Further, on the other axial side of the connecting portion 321c, the outer peripheral surface 502a of the shaft main body portion 321a and the inner peripheral surface 502b of the rotor core holding portion 321b face each other in the radial direction. *
  • the first shaft 320a includes a first shaft recess 321A that opens toward one side in the axial direction and a second shaft recess 321B that opens toward the other side in the axial direction.
  • the first shaft recess 321A is an annular groove that opens to one side in the axial direction and extends in the circumferential direction.
  • the first shaft recess 321A has the outer peripheral surface 501a of the shaft main body portion 321a and the inner peripheral surface 501b of the rotor core holding portion 321b as side surfaces, and the surface 501c on one axial side of the connection portion 321c as a bottom surface.
  • the inner peripheral surface 501b of the rotor core holding portion 321b is inclined outward in the radial direction toward the opening end on one axial side of the rotor core holding portion 321b.
  • the inner peripheral surface 501b of the rotor core holding portion 321b has a curved slope portion 501d at the end on the opening side in the axial direction.
  • the inclined surface portion 501d is a curved surface that is inclined outward in the radial direction toward the one side in the axial direction.
  • the second shaft recess 321B is an annular groove that opens to the other side in the axial direction and extends in the circumferential direction.
  • the second shaft recess 321B has the outer peripheral surface 502a of the shaft main body portion 321a and the inner peripheral surface 502b of the rotor core holding portion 321b as side surfaces, and the surface 502c on one axial side of the connection portion 321c as a bottom surface.
  • the inner peripheral surface 502b of the rotor core holding portion 321b is inclined radially outward toward the opening end on the other axial side of the rotor core holding portion 321b.
  • the shaft body 321a is rotatably supported by a bearing 370 located on one side in the axial direction of the connecting part 321c and a bearing 371 located on the other side in the axial direction of the connecting part 321c.
  • the bearings 370 and 371 are ball bearings, for example.
  • a part of the bearing holding portion 312e that holds the bearing 370 overlaps the rotor core holding portion 321b when viewed in the radial direction. According to this structure, the axial direction length of the generator 3 can be shortened, and it can be reduced in thickness. *
  • the cylindrical portion 402 of the bearing holding portion 312e has a shape whose diameter increases toward the one side in the axial direction in the vicinity of the opening on the one side in the axial direction of the rotor core holding portion 321b. That is, the outer peripheral surface of the bearing holding portion 312e is an inclined surface that is inclined radially outward from the inner side of the rotor core holding portion 321b toward the outer side in the axial direction.
  • the outer peripheral surface of the bearing holding portion 312e has a curved surface shape that follows the inclined surface portion 501d of the rotor core holding portion 321b facing each other through a gap.
  • the annular portion 401 of the bearing holding portion 312e faces the flange portion 503 in the axial direction. That is, the bearing holding portion 312e faces the surface of the rotor core holding portion 321b facing the axial direction.
  • the shaft main body portion 321a has an output portion 321e at the end on the other side in the axial direction.
  • a rotation detector 380 is arranged on one side of the bearing 370 in the axial direction.
  • the rotation detector 380 detects the rotation of the first rotor 320.
  • the rotation detection unit 380 is, for example, a VR (Variable Reluctance) type resolver.
  • the rotation detection unit 380 is disposed on the radially inner side of the inner cylinder portion 312c.
  • the resolver rotor of the rotation detector 380 is fixed to one end of the shaft main body 321a in the axial direction, and the resolver stator is fixed to the inner periphery of the inner cylinder portion 312c.
  • the rotation detection unit 380 may have a configuration in which a Hall element, an MR (Magneto Resistive) element, and a magnet are combined. *
  • the shaft main body portion 321a has a first in-shaft oil passage 93A that has a bottomed hole that opens to an end portion on one axial side of the shaft main body portion 321a and extends to the other axial side.
  • the end portion on the other side in the axial direction of the first in-shaft oil passage 93A is closed.
  • the inner edge of the first shaft oil passage 93A has a circular shape centered on the first rotation axis J1 in the cross section orthogonal to the axial direction.
  • the rotor core holding part 321b is a part to which the rotor core 322 is attached on the first shaft 320a.
  • the rotor core 322 has an annular shape fixed to the shaft main body 321a.
  • the rotor core 322 is fitted to the outer peripheral surface of the cylindrical rotor core holding part 321b.
  • the rotor core 322 has a plurality of rotor magnets (not shown). The plurality of rotor magnets are arranged along the circumferential direction of the rotor core 322. *
  • the rotor core holding part 321b has a flange part 503 that extends radially outward from an end on one axial side.
  • the flange portion 503 has a female screw portion 503a penetrating in the axial direction.
  • the first end plate 324 is disposed so as to be sandwiched between the flange portion 503 and the rotor core 322 in the axial direction.
  • the second end plate 325 is disposed in contact with the surface on the other axial side of the rotor core 322.
  • the first end plate 324 and the second end plate 325 have an annular plate shape that expands in the radial direction. However, the first end plate 324 may not be provided. *
  • the rotor core 322 and the second end plate 325 have through holes that penetrate the rotor core 322 and the second end plate 325 in the axial direction.
  • the rotor core 322 is fixed to the rotor core holding part 321b by bolts 504.
  • the bolt 504 is inserted into the through hole of the rotor core 322 and the second end plate 325.
  • the male screw portion of the bolt 504 is fastened to the female screw portion of the flange portion 503. *
  • the rotor core holding part 321b has the flange part 503, whereby the rotor core 322 can be positioned and fixed in the axial direction.
  • the bolt 504 can be fastened without using a nut. Since the tip of the bolt 504 protrudes slightly on the surface on one side in the axial direction of the flange portion 503, it is difficult to inhibit the flow of the oil O that travels on the surface of the flange portion 503.
  • the attachment member 350 is fixed to one side in the axial direction of the shaft main body 321a by a cap-shaped connecting member 351.
  • the connecting member 351 has a through hole that penetrates the connecting member 351 in the axial direction, and the attachment member 350 is inserted into the through hole of the connecting member 351.
  • the through-hole of the attachment member 350 constitutes a part of the first in-shaft oil passage 93A of the shaft main body portion 321a and is connected to the discharge-side oil passage 340b of the first pump portion 340.
  • the attachment member 350 extends to one side in the axial direction from the shaft body 321a and is rotatably supported by the second through hole 313f. *
  • the first in-shaft oil passage 93A is branched into a plurality of first radial oil passages 93B at the axial central portion of the shaft main body portion 321a.
  • the plurality of first radial oil passages 93B extend radially from the first shaft oil passage 93A in the radial direction.
  • the number of first radial oil passages 93B is, for example, 2 to 16.
  • the first radial oil passage 93B may have a shape that is inclined or curved with respect to the radial direction as long as oil can be guided radially outward from the first shaft oil passage 93A. *
  • the first radial oil passage 93B extends in the radial direction from the first shaft oil passage 93A, passes through the connection portion 321c and the rotor core holding portion 321b, and opens to the outer peripheral surface of the rotor core holding portion 321b. Therefore, a part of the inner peripheral surface of the rotor core 322 is exposed at the radially outer end of the first radial oil passage 93B. Thereby, the rotor core 322 can also be cooled by the oil O. *
  • the first radial oil passage 93B is branched into two third branch oil passages 363A and 363B inside the connection portion 321c.
  • the third branch oil passage 363A extends from the branch point with the first radial oil passage 93B to one side in the axial direction, and opens to a surface 501c on the one side in the axial direction of the connecting portion 321c.
  • the third branch oil passage 363B extends from the branch point with the first radial oil passage 93B to the other side in the axial direction, and opens on the surface 502c on the other side in the axial direction of the connecting portion 321c.
  • the third branch oil passages 363A and 363B may have a shape inclined or curved with respect to the axial direction as long as the oil can be guided in the axial direction from the first radial oil passage 93B. *
  • the third branch oil passages 363A and 363B open at the radial center of the connection portion 321c.
  • the corners of the bottom surfaces of the first shaft recess 321A and the second shaft recess 321B tend to be rounded, and the drill is easy to slip near the corners, making drilling difficult.
  • the central portion in the radial direction of the connecting portion 321c is likely to be a relatively flat surface, so that drilling is easy to perform. Further, since the processing is easy, it is easy to improve the accuracy of the third branch oil passages 363A, 363B. *
  • the shaft main body portion 321a further includes bearing lubrication oil passages 364A and 364B extending from the first in-shaft oil passage 93A to the bearings 370 and 371.
  • the bearing lubrication oil passage 364A is branched from the axial center of the first shaft oil passage 93A and extends obliquely outward in the radial direction toward the one radial side.
  • the bearing lubrication oil passage 64A opens at a position facing the other surface in the axial direction of the bearing 370 on the outer peripheral surface of the shaft main body 321a.
  • connection position between the bearing lubrication oil path 364A and the first in-shaft oil path 93A is on one axial side than the connection position between the first radial oil path 93B and the first in-shaft oil path 93A.
  • the number of bearing lubrication oil passages 364A is, for example, 1 to 8. *
  • the bearing lubrication oil passage 364B is branched from the end portion on the other axial side of the first shaft oil passage 93A and extends outward in the radial direction.
  • the connection position between the bearing lubrication oil passage 364B and the first in-shaft oil passage 93A is on the other side in the axial direction from the bearing 371.
  • the bearing lubrication oil passage 364B extends radially outward from the first shaft oil passage 93A.
  • the bearing lubrication oil passage 364B opens at a position facing the other surface in the axial direction of the bearing 371 on the outer peripheral surface of the shaft main body 321a.
  • the number of bearing lubrication oil passages 364B is, for example, 1 to 8. *
  • the 1st pump part 340 is driven via the 1st shaft 320a.
  • the external gear 342 fixed to the first shaft 320a rotates.
  • the internal gear 343 that meshes with the external gear 342 rotates, and the oil O is pumped from the lower portion of the generator housing portion 314 via the suction-side oil passage 340a.
  • the oil O sucked between the external gear 42 and the internal gear 343 is discharged to the discharge side oil passage 340b.
  • the oil O discharged to the discharge side oil passage 340b flows into the first shaft oil passage 93A.
  • the oil O that has flowed into the first in-shaft oil passage 93A flows into a plurality of first radial oil passages 93B that branch off in the central portion in the axial direction. Further, the oil O that has flowed into the first radial oil passage 93B flows into two third branch oil passages 363A and 363B that branch at the radial center of the first radial oil passage 93B. The oil O that has flowed into the third branch oil passage 363A flows into the first shaft recess 321A from the opening located on the surface 501c facing the one side in the axial direction of the connecting portion 321c. *
  • the oil O that has flowed into the first shaft recess 321A moves radially outward due to centrifugal force and reaches the inner peripheral surface 501b of the rotor core holding portion 321b.
  • the oil O on the inner peripheral surface 501b moves to one side in the axial direction along the inclination of the inner peripheral surface 501b.
  • the oil O that has reached the end on the one axial side of the inner peripheral surface 501b is directed radially outward along the inclined surface 501d and flows out of the first shaft recess 321A.
  • the inner peripheral surface 501b is an inclined surface, the oil O smoothly moves to the coil 332 side without staying on the inner peripheral surface 501b.
  • the moving direction of the oil O can be smoothly turned from the axial direction to the radial direction, and the main scattering direction of the oil O is directed to the coil 332. be able to.
  • the oil O that has flowed out of the first shaft recess 321A scatters directly from the end on the one axial side of the inner peripheral surface 501b to the outside in the radial direction, or travels radially outward through the surface of the flange portion 503. Scatter.
  • the scattered oil O adheres to the coil 332 of the first stator 330 and cools the coil 332.
  • the rotor core holding portion 321b has the flange portion 503, so that the oil O flowing out from the inclined surface portion 501d at the opening end of the first shaft concave portion 321A to the radially outer side is disposed on one axial side of the flange portion 503. The surface can be transmitted and smoothly scattered radially outward. *
  • the bearing holding portion 312e is disposed at a position facing the inner peripheral surface 501b and the flange portion 503 of the rotor core holding portion 321b.
  • the oil O that has flowed into the second shaft recess 321B moves outward in the radial direction by centrifugal force and reaches the inner peripheral surface 502b of the rotor core holding portion 321b.
  • the oil O on the inner peripheral surface 502b moves to the other axial side along the inclination of the inner peripheral surface 502b, and flows out of the second axial recess 321B from the other axial end of the inner peripheral surface 501b.
  • the inner peripheral surface 502b is an inclined surface, the oil O moves smoothly to the coil 332 side without staying on the inner peripheral surface 502b.
  • the oil O that has flowed out of the second shaft recess 321B directly scatters radially outward from the other axial end of the inner peripheral surface 502b, or travels radially outward along the surface of the second end plate 325. Then splash. The scattered oil O adheres to the coil 332 of the first stator 330 and cools the coil 332.
  • the flow passage cross-sectional areas of the oil passages are the first shaft oil passage 93A, the first radial oil passage 93B, the third branch oil passage 363A, It becomes small in order of 363B.
  • a plurality of first radial oil passages 93B are branched from one first shaft oil passage 93A, and two third branch oil passages 363A, 363B are further branched from one first radial oil passage 93B. Since the oil passage is narrowed every time it is branched, the cross-sectional area of the entire oil passage can be maintained, and the oil O can be conveyed at a constant pressure.
  • the flow passage cross-sectional area of the first shaft oil passage 93A may be 90% or more and 110% or less of the sum of the flow passage cross-sectional areas of the plurality of first radial oil passages 93B branched. .
  • the pressure fluctuation of the oil O flowing from the first shaft oil passage 93A to the first radial oil passage 93B can be suppressed. Thereby, it can suppress that the supply amount of the oil O to the coil 332 varies in the circumferential direction.
  • the flow passage cross-sectional area of the first radial oil passage 93B may be 90% or more and 110% or less of the sum of the flow passage cross-sectional areas of the third branch oil passages 363A and 363B branched.
  • the bearing lubrication oil passages 364A and 364B are branched from the first in-shaft oil passage 93A. Therefore, the relationship between the flow passage cross-sectional areas may take into account the flow passage cross-sectional areas of the bearing lubrication oil passages 364A and 364B. That is, the flow passage cross-sectional area of the first shaft oil passage 93A is the flow of the plurality of first radial oil passages 93B and bearing lubrication oil passages 364A and 364B branched from the first shaft oil passage 93A. It may be 90% or more and 110% or less of the sum of the road cross-sectional areas. Thereby, pressure fluctuation can be suppressed in each oil passage branched from the first shaft oil passage 93A, and variation in the discharge amount of the oil O can be suppressed. *
  • the first pump unit 340 is driven by the rotation of the first shaft 320a, and the oil O stored in the housing 10 is sucked up by the first pump unit 340, and the first rotor 320, first The stator 330 and the bearings 370 and 371 can be supplied.
  • the oil O stored in the housing 10 can be used to cool the first rotor 320 and the first stator 330, and the lubricity between the bearings 370 and 371 and the shaft main body 321a can be improved.
  • the oil O supplied to the first stator 330 and the bearings 370 and 371 falls in the generator housing portion 314 and is stored again in the lower region of the generator housing portion 314. Thereby, the oil O in the generator accommodating part 314 can be circulated.
  • the motor 2 of this embodiment includes a housing 10, a second rotor 20 having a second shaft 20 a disposed along a second rotation axis J ⁇ b> 2 extending in one direction, and rotation.
  • the detection part 80, the 2nd stator 30, the 2nd pump part 40, and the bearings 70 and 71 are provided.
  • the second rotation axis J2 extends in the left-right direction in FIG. That is, in this embodiment, the left-right direction in FIG. 4 corresponds to one direction.
  • a direction parallel to the axial direction of the second rotation axis J ⁇ b> 2 is simply referred to as “axial direction”
  • a radial direction around the second rotation axis J ⁇ b> 2 is simply referred to as “radial direction”.
  • the circumferential direction around the second rotation axis J2 is simply referred to as “circumferential direction”.
  • the left side of FIG. 4 in the axial direction is referred to as “one axial side”
  • the right side of FIG. 4 in the axial direction is referred to as “the other axial side”. *
  • the housing 10 includes a motor housing main body portion 11, an inner lid portion 12, and an outer lid portion 13.
  • the motor housing main body 11, the inner lid 12, and the outer lid 13 are separate members.
  • the motor housing main body 11 has a bottomed cylindrical shape that opens to one side in the axial direction.
  • the motor housing body 11 has a bottom 11a, a body cylinder 11b, and a bearing holding part 11c.
  • the bottom portion 11a has an annular plate shape that expands in the radial direction.
  • the main body cylinder portion 11b has a cylindrical shape extending from the radially outer edge portion of the bottom portion 11a to one side in the axial direction.
  • the bearing holding portion 11c has a cylindrical shape protruding from the inner edge portion of the bottom portion 11a to one side in the axial direction.
  • the bearing holding portion 11c holds the bearing 71 on the inner peripheral surface. *
  • the inner lid part 12 is attached to one side in the axial direction of the motor housing main body part 11.
  • the inner lid portion 12 includes an annular plate portion 12a, an outer cylinder portion 12b, an inner cylinder portion 12c, an inner cylinder bottom portion 12d, and a bearing holding portion 12e.
  • the annular plate portion 12a has an annular plate shape that extends in the radial direction.
  • the annular plate portion 12 a covers one axial side of the second stator 30. That is, the inner lid portion 12 covers one side of the second stator 30 in the axial direction.
  • the outer cylinder part 12b is a cylindrical shape extended from the radial direction outer edge part of the annular plate part 12a to the other side of an axial direction.
  • the end portion on the other side in the axial direction of the outer tube portion 12b is fixed in contact with the end portion on the one side in the axial direction of the main body tube portion 11b.
  • the inner cylinder portion 12c has a cylindrical shape extending from the radially inner edge of the annular plate portion 12a to the other side in the axial direction.
  • the inner cylinder bottom portion 12d has an annular shape that extends radially inward from the other axial end of the inner cylinder portion 12c.
  • the inner lid portion 12 is provided with a second recess 12g that is recessed from the surface on the one axial side of the inner lid portion 12 to the other axial side. That is, the inner lid part 12 has the 2nd recessed part 12g.
  • the surface on the one side in the axial direction of the inner lid portion 12 is the surface on the one side in the axial direction of the annular plate portion 12a.
  • the inner side surface of the second recess 12g includes a radially inner side surface of the inner cylinder portion 12c and a surface on one axial side of the inner cylinder bottom portion 12d.
  • the bearing holding portion 12e has a cylindrical shape that protrudes from the surface on the other axial side of the inner cylinder bottom portion 12d to the other axial side.
  • the bearing holding part 12e holds the bearing 70 on the inner peripheral surface. That is, the inner lid portion 12 holds the bearing 70.
  • a motor housing 14 surrounded by the motor housing main body 11 and the inner lid 12 is configured. That is, the housing 10 has a motor housing portion 14. A motor chamber 19 ⁇ / b> A (see FIG. 1) is configured inside the motor housing portion 14. The motor housing portion 14 houses the second rotor 20 and the second stator 30. *
  • the outer lid portion 13 is attached to one side in the axial direction of the inner lid portion 12.
  • the outer lid portion 13 includes an outer lid main body portion 13a and a plug body portion 13b.
  • the outer lid body 13a expands in the radial direction.
  • the outer lid main body portion 13a includes a lid plate portion 13c and a protruding portion 13d.
  • the lid plate portion 13c has a disk shape that expands in the radial direction.
  • the radially outer edge portion of the lid plate portion 13c is fixed to the radially outer edge portion of the annular plate portion 12a.
  • the surface on the other side in the axial direction of the cover plate portion 13c is in contact with the surface on the one side in the axial direction of the annular plate portion 12a.
  • the protruding portion 13d protrudes from the center portion of the lid plate portion 13c to the other side in the axial direction.
  • the protruding portion 13d is inserted into the inner cylinder portion 12c from one side in the axial direction.
  • the protruding portion 13d is disposed at an interval on one side in the axial direction of the inner cylinder bottom portion 12d.
  • the outer lid main body 13a has a first recess 13e and a second through hole 13f.
  • the first recess 13e is recessed from the surface on one side in the axial direction of the outer lid main body 13a to the other side in the axial direction.
  • the 1st recessed part 13e is provided in the center part of the outer cover main-body part 13a, and is provided ranging over the cover board part 13c and the protrusion part 13d.
  • the second through hole 13f penetrates from the bottom surface of the first recess 13e to the other surface in the axial direction of the protrusion 13d. That is, the second through hole 13f penetrates from the bottom surface of the first recess 13e to the inside of the housing 10.
  • the second through hole 13f opens inside the second recess 12g. Thereby, the second through hole 13f connects the inside of the first recess 13e and the inside of the second recess 12g.
  • the second rotation axis J2 passes through the second through hole 13f.
  • the plug body portion 13b is fitted into the first recess 13e and is fixed to the outer lid main body portion 13a.
  • the plug part 13b closes the opening on the one axial side of the first recess 13e.
  • the plug part 13b covers one side in the axial direction of the second shaft 20a. That is, the outer lid portion 13 covers one axial side of the second shaft 20a.
  • the plug body portion 13b has a flange portion 13g that protrudes radially outward at an end portion on one axial side.
  • the flange portion 13g contacts the surface on one side in the axial direction of the lid plate portion 13c. Thereby, the plug part 13b can be positioned in an axial direction.
  • a pump chamber 46 is provided in the outer lid portion 13.
  • the pump chamber 46 is provided between the axial direction other side surface of the plug part 13b and the bottom surface of the first recess 13e.
  • the surface on the other axial side of the pump chamber 46 is the bottom surface of the first recess 13e.
  • the surface on the one axial side of the pump chamber 46 is the surface on the other axial side of the plug body portion 13b.
  • the pump chamber 46 is an end on the other side in the axial direction of the inside of the first recess 13e.
  • the pump chamber 46 is disposed on the radially inner side of the inner cylinder portion 12c, that is, inside the second recess 12g.
  • the second rotation axis J2 passes through the pump chamber 46.
  • the outer shape of the pump chamber 46 is circular when viewed in the axial direction.
  • the pump chamber 46 accommodates an internal gear 43 and an external gear 42 which will be described later. *
  • the housing 10 includes an in-lid oil passage 61 and a second suction oil passage 96.
  • the in-lid oil passage 61 is provided in the outer lid portion 13. More specifically, the in-lid oil passage 61 is provided in the plug body portion 13b. Therefore, the configuration of the in-lid oil passage 61 can be easily changed by replacing the plug body portion 13b.
  • the in-lid oil passage 61 is disposed on one axial side of the pump chamber 46.
  • the oil passage 61 in the lid connects the upper end portion of the pump chamber 46 and the central portion of the pump chamber 46 on one axial side of the pump chamber 46. A portion connected to the pump chamber 46 in the oil passage 61 in the lid opens on the surface on the other axial side of the plug body portion 13b.
  • An upper end portion connected to the in-lid oil passage 61 in the pump chamber 46 is a discharge port 45. That is, the in-lid oil passage 61 is connected to the discharge port 45.
  • a central portion connected to the in-lid oil passage 61 in the pump chamber 46 is a connection port 61a. As shown in FIG. 5, the discharge port 45 and the connection port 61a are, for example, circular. The discharge port 45 is disposed above the connection port 61a. The second rotation axis J2 passes through the connection port 61a. *
  • the second rotor 20 includes a second shaft 20 a, a rotor core 22, a magnet 23, a first end plate 24, and a second end plate 25.
  • the second shaft 20 a includes a motor shaft main body 21 and an attachment member 50.
  • the motor shaft body 21 has a cylindrical shape extending in the axial direction.
  • the motor shaft main body 21 has a large diameter portion 21a, a first medium diameter portion 21b, a second medium diameter portion 21c, a small diameter portion 21d, and an output portion 21e. *
  • the large diameter portion 21a is a portion to which the rotor core 22 is attached.
  • a male screw portion is provided on the outer peripheral surface of the end portion on one axial side of the large diameter portion 21a.
  • a nut 88 is fastened to the male screw portion of the large diameter portion 21a.
  • the first medium diameter portion 21b is connected to the large diameter portion 21a on one axial side of the large diameter portion 21a.
  • the outer diameter of the first medium diameter portion 21b is smaller than the outer diameter of the large diameter portion 21a.
  • the end portion on the other axial side of the first medium diameter portion 21b is rotatably supported by the bearing 70. *
  • the second medium diameter portion 21c is connected to the large diameter portion 21a on the other axial side of the large diameter portion 21a.
  • the outer diameter of the second medium diameter portion 21c is smaller than the outer diameter of the large diameter portion 21a.
  • the end portion on the one axial side of the second medium diameter portion 21c is rotatably supported by the bearing 71.
  • the bearings 70 and 71 rotatably support the second shaft 20a.
  • the bearings 70 and 71 are ball bearings, for example. *
  • the small diameter portion 21d is connected to the first medium diameter portion 21b on one axial side of the first medium diameter portion 21b.
  • An end portion on one side in the axial direction of the small diameter portion 21 d is an end portion on one side in the axial direction of the motor shaft main body 21.
  • the end portion on one side in the axial direction of the small diameter portion 21d is disposed on the radially inner side of the inner cylinder portion 12c.
  • the outer diameter of the small diameter portion 21d is smaller than the outer diameter of the first medium diameter portion 21b. That is, the small diameter portion 21d is a portion whose outer diameter decreases toward one side in the axial direction.
  • the output part 21e is connected to the second medium diameter part 21c on the other axial side of the second medium diameter part 21c.
  • the output portion 21e is an end portion on the other side in the axial direction of the motor shaft main body 21.
  • the outer diameter of the output part 21e is smaller than the outer diameter of the small diameter part 21d.
  • the output portion 21e protrudes outside the housing 10 through the bottom portion 11a in the axial direction.
  • the motor shaft main body 21 has a flange portion 21f.
  • the flange portion 21f protrudes radially outward from the outer peripheral surface of the large diameter portion 21a.
  • the flange portion 21f has an annular plate shape that is provided over the circumference of the outer peripheral surface of the large diameter portion 21a.
  • the flange portion 21f is provided at the end portion on the other axial side of the large diameter portion 21a.
  • the motor shaft main body 21 has a hole 21g extending from the end on one side in the axial direction of the motor shaft main body 21 to the other side in the axial direction.
  • the hole 21g is a bottomed hole that opens to one side in the axial direction. That is, the end on the other axial side of the hole 21g is closed.
  • the attachment member 50 is fixed to one side in the axial direction of the motor shaft main body 21.
  • the attachment member 50 is fitted into the hole 21g and fixed.
  • the attachment member 50 has a cylindrical shape that opens on both sides in the axial direction.
  • the attachment member 50 has a cylindrical shape centered on the second rotation axis J2.
  • the attachment member 50 extends to one side in the axial direction from the motor shaft main body 21 and passes through the second through hole 13f. *
  • the attachment member 50 includes a fitting part 51 and a fixing part 52.
  • the fitting part 51 is a part fitted in the hole part 21g.
  • the fitting portion 51 is fixed to the inner peripheral surface of the end portion on one side in the axial direction of the hole portion 21g, and extends from the inside of the hole portion 21g to one side in the axial direction than the motor shaft main body 21.
  • One end of the fitting part 51 in the axial direction is inserted into the second through hole 13f. That is, at least a part of the fitting portion 51 is inserted into the second through hole 13f. Therefore, the radial gap between the outer peripheral surface of the mounting member 50 and the inner peripheral surface of the second through hole 13f can be increased. Thereby, even if it is a case where the position of the attachment member 50 shifts
  • the fixing part 52 is located on one side in the axial direction of the fitting part 51.
  • the fixing portion 52 is connected to the end portion on one side in the axial direction of the fitting portion 51.
  • the outer diameter of the fixing portion 52 is larger than the outer diameter of the fitting portion 51 and smaller than the inner diameter of the second through hole 13f.
  • the fixing portion 52 is inserted into the pump chamber 46.
  • the inner diameter of the fitting part 51 and the inner diameter of the fixed part 52 are, for example, the same. *
  • an external gear 42 described later is fixed to the attachment member 50.
  • the external gear 42 is fixed to the radially outer surface of the fixing portion 52. More specifically, the fixing portion 52 is fitted and fixed in a fixing hole portion 42b that penetrates the external gear 42 in the axial direction.
  • the fitting portion 51 having an outer diameter smaller than that of the fixing portion 52 is fitted into the hole portion 21g, and the external gear 42 is attached to the fixing portion 52 having an outer diameter larger than that of the fitting portion 51. Fix it. Therefore, the inner diameter of the hole portion 21g can be made smaller than the inner diameter of the fixed hole portion 42b of the external gear 42. Thereby, it is easy to make the internal diameter of the hole 21g comparatively small, and it can suppress that the rigidity of the motor shaft main body 21 falls.
  • the second shaft 20a has a second in-shaft oil passage 97A provided inside the second shaft 20a.
  • the second shaft oil passage 97A is a bottomed hole that extends from the end on the one axial side of the second shaft 20a so as to be recessed toward the other axial side.
  • the second in-shaft oil passage 97A opens to one axial side.
  • the second shaft oil passage 97 ⁇ / b> A extends from one end of the mounting member 50 in the axial direction to the other end of the second medium diameter portion 21 c in the axial direction. It is provided across.
  • the second in-shaft oil passage 97A is configured by connecting the inside of the attachment member 50 and the hole 21g in the axial direction. That is, the radially inner side surface of the mounting member 50 constitutes a part of the radially inner side surface of the second shaft oil passage 97A.
  • the inner edge of the second shaft oil passage 97A has a circular shape with the second rotation axis J2 as the center in the cross section orthogonal to the axial direction.
  • the inner diameter of the portion provided in the mounting member 50 in the second shaft oil passage 97A is smaller than the inner diameter of the portion provided in the motor shaft main body 21 in the second shaft oil passage 97A. That is, the inner diameter of the mounting member 50 is smaller than the inner diameter of the hole 21g.
  • the opening on one side in the axial direction of the mounting member 50 is connected to the connection port 61 a, whereby the second shaft oil passage 97 ⁇ / b> A is connected to the lid oil passage 61 through the inside of the attachment member 50.
  • the second shaft oil passage 97 ⁇ / b> A opens into the lid oil passage 61 at the end on one axial side of the second shaft 20 a.
  • the second shaft 20a has first through holes 26a to 26d that connect the second in-shaft oil passage 97A and the outer peripheral surface of the second shaft 20a.
  • the first through holes 26a to 26d function as the second radial oil passage 97B.
  • the first through holes 26a to 26d extend in the radial direction.
  • the first through holes 26a and 26b are provided in the large diameter portion 21a.
  • the first through holes 26a and 26b are disposed between the nut 88 and the flange portion 21f in the axial direction.
  • the radially outer end of the first through hole 26 a opens in the axial gap 27 a between the first end plate 24 and the rotor core 22.
  • the radially outer end of the first through hole 26 b opens in the axial gap 27 b between the second end plate 25 and the rotor core 22.
  • the first through hole 26c is provided in the first medium diameter portion 21b.
  • the radially outer end of the first through hole 26c opens on the radially inner side of the bearing holding portion 12e on one axial side of the bearing 70.
  • the first through hole 26d is provided in the second medium diameter portion 21c.
  • the radially outer end of the first through hole 26d opens on the radially inner side of the bearing holding portion 11c on the other axial side of the bearing 71.
  • a plurality of first through holes 26a to 26d are provided along the circumferential direction. *
  • the rotor core 22 has an annular shape fixed to the motor shaft main body 21.
  • the rotor core 22 is fitted into the large diameter portion 21a.
  • the rotor core 22 has a magnet insertion hole 22b that penetrates the rotor core 22 in the axial direction.
  • a plurality of magnet insertion holes 22b are provided along the circumferential direction.
  • the magnet 23 is inserted into the magnet insertion hole 22b.
  • the first end plate 24 and the second end plate 25 have an annular plate shape that expands in the radial direction.
  • a large diameter portion 21 a is passed through the first end plate 24 and the second end plate 25.
  • the first end plate 24 and the second end plate 25 sandwich the rotor core 22 in the axial direction while being in contact with the rotor core 22.
  • the first end plate 24 is disposed on one axial side of the rotor core 22.
  • the radially outer edge portion of the first end plate 24 protrudes to the other side in the axial direction, and contacts the radially outer edge portion of the surface on the one axial side of the rotor core 22.
  • the radially outer edge of the first end plate 24 overlaps with the opening on one axial side of the magnet insertion hole 22b in the axial direction, and presses the magnet 23 inserted into the magnet insertion hole 22b from one axial side.
  • a portion radially inward from the radially outer edge portion of the first end plate 24 faces the surface on one side in the axial direction of the rotor core 22 in the axial direction through a gap 27a.
  • the first end plate 24 has an ejection groove 24 a that is recessed from the surface on one side in the axial direction of the first end plate 24 toward the other side in the axial direction.
  • the ejection groove 24a extends in the radial direction.
  • the radially inner end of the ejection groove 24a penetrates the first end plate 24 in the axial direction and is connected to the gap 27a.
  • the radially outer end of the ejection groove 24a opens to the radially outer side of the first end plate 24, and opposes a coil 32, which will be described later, with a gap in the radial direction.
  • the opening on the one axial side in the radially inner portion of the ejection groove 24a is closed by a washer 89 that is sandwiched and fixed between the nut 88 and the first end plate 24 in the axial direction.
  • the washer 89 has an annular plate shape that expands in the radial direction.
  • the second end plate 25 is disposed on the other axial side of the rotor core 22.
  • the radially outer edge portion of the second end plate 25 projects to one side in the axial direction and contacts the radially outer edge portion of the surface on the other axial side of the rotor core 22.
  • the radially outer edge of the second end plate 25 overlaps the opening on the other axial side of the magnet insertion hole 22b in the axial direction, and presses the magnet 23 inserted into the magnet insertion hole 22b from the other axial side.
  • the magnet 23 inserted into the magnet insertion hole 22b is pressed by the first end plate 24 and the second end plate 25 on both sides in the axial direction. Therefore, the magnet 23 can be prevented from coming out of the magnet insertion hole 22b.
  • the radially inner portion of the second end plate 25 is radially opposed to the surface on the other axial side of the rotor core 22 via the gap 27b.
  • the second end plate 25 has an ejection groove 25 a that is recessed from the surface on the other axial side of the second end plate 25 to the one axial side.
  • the ejection groove 25a extends in the radial direction.
  • the radially inner end of the ejection groove 25a penetrates the second end plate 25 in the axial direction and is connected to the gap 27b.
  • the radially outer end of the ejection groove 25a opens to the radially outer side of the second end plate 25, and opposes the coil 32, which will be described later, with a gap in the radial direction.
  • the opening on the other side in the axial direction in the radially inner portion of the ejection groove 25a is closed by the flange portion 21f. *
  • the first end plate 24, the rotor core 22, and the second end plate 25 are sandwiched in the axial direction by the nut 88, the washer 89, and the flange portion 21f.
  • the nut 88 presses the first end plate 24, the rotor core 22, and the second end plate 25 against the flange portion 21 f via the washer 89.
  • the 1st end plate 24, the rotor core 22, and the 2nd end plate 25 are fixed to the 2nd shaft 20a.
  • the rotation detector 80 shown in FIG. 4 detects the rotation of the second rotor 20.
  • the rotation detection unit 80 is, for example, a VR (Variable Reluctance) type resolver.
  • the rotation detector 80 is disposed on the radially inner side of the inner cylinder portion 12c.
  • the rotation detection unit 80 includes a detected unit 81 and a sensor unit 82. *
  • the detected part 81 has an annular shape extending in the circumferential direction.
  • the detected part 81 is fitted and fixed to the second shaft 20a. More specifically, the detected portion 81 is fitted and fixed to the small diameter portion 21d.
  • the surface on the other axial side of the radially inner edge of the detected portion 81 is in contact with the step between the first medium diameter portion 21b and the small diameter portion 21d.
  • the detected portion 81 overlaps the mounting member 50 in the radial direction. Therefore, the second shaft 20a can be easily downsized in the axial direction as compared to the case where the detected portion 81 and the attachment member 50 are arranged in the axial direction without overlapping in the radial direction.
  • the detected part 81 is made of a magnetic material. *
  • the sensor portion 82 is disposed between the inner lid portion 12 and the outer lid portion 13 in the axial direction. More specifically, the sensor part 82 is fixed to the surface on the one axial side of the inner cylinder bottom part 12d on the radially inner side of the inner cylinder part 12c. That is, the sensor unit 82 is attached to the inner lid unit 12. Therefore, it is easy to attach the sensor unit 82.
  • the sensor part 82 is arrange
  • the sensor unit 82 has an annular shape that surrounds the radially outer side of the detected portion 81.
  • the sensor unit 82 has a plurality of coils along the circumferential direction.
  • an induced voltage corresponding to the circumferential position of the detected portion 81 is generated in the coil of the sensor portion 82.
  • the sensor unit 82 detects the rotation of the detected unit 81 by detecting the induced voltage.
  • the rotation detection unit 80 detects the rotation of the second rotor 20 by detecting the rotation of the second shaft 20a.
  • the second stator 30 faces the second rotor 20 via a gap in the radial direction.
  • the second stator 30 has a stator core 31 and a plurality of coils 32 attached to the stator core 31.
  • the stator core 31 has an annular shape around the second rotation axis J2.
  • the outer peripheral surface of the stator core 31 is fixed to the inner peripheral surface of the main body cylinder portion 11b.
  • the stator core 31 is opposed to the outer side in the radial direction of the rotor core 22 via a gap. *
  • the second pump part 40 is provided in the center part of the outer lid part 13.
  • the 2nd pump part 40 is arrange
  • the second pump unit 40 includes an external gear 42, an internal gear 43, the above-described pump chamber 46, a suction port 44, a discharge port 45, and a storage unit 48.
  • the external gear 42 is a gear that can rotate around the second rotation axis J2.
  • the external gear 42 is fixed to the end portion on one side in the axial direction of the second shaft 20a. More specifically, the external gear 42 is fixed to the outer peripheral surface of the fixing portion 52. Therefore, the external gear 42 can be fixed to the motor shaft main body 21 via the mounting member 50. Thereby, the external gear 42 can be fixed to the motor shaft main body 21 without changing the dimensions of the motor shaft main body 21 and the external gear 42 by adjusting the dimensions of the mounting member 50.
  • the external gear 42 is accommodated in the pump chamber 46. As shown in FIG. 5, the external gear 42 has a plurality of tooth portions 42a on the outer peripheral surface.
  • the tooth profile of the tooth portion 42a of the external gear 42 is a trochoidal tooth profile.
  • the internal gear 43 is an annular gear that is rotatable around an eccentric rotation axis Jt that is eccentric with respect to the second rotation axis J2.
  • the internal gear 43 is accommodated in the pump chamber 46.
  • the internal gear 43 surrounds the radially outer side of the external gear 42 and meshes with the external gear 42.
  • the internal gear 43 has a plurality of tooth portions 43a on the inner peripheral surface.
  • the tooth profile of the tooth portion 43a of the internal gear 43 is a trochoidal tooth profile.
  • the opening on the one axial side of the first recess 13e is closed by the plug portion 13b.
  • the pump chamber 46 can be configured, and the internal gear 43 and the external gear 42 can be accommodated in the pump chamber 46. Therefore, the assembly of the 2nd pump part 40 can be made easy.
  • the suction port 44 is connected to the second suction oil passage 96. As shown in FIG. 4, the suction port 44 opens to the other axial side of the pump chamber 46. The suction port 44 is connected to a gap between the external gear 42 and the internal gear 43. The suction port 44 can suck the oil O through the second suction oil passage 96 into the pump chamber 46, more specifically, into the gap between the external gear 42 and the internal gear 43. As shown in FIG. 5, the suction port 44 is disposed above the lower end portion of the storage portion 48 and above the lower end portion of the external gear 42. *
  • the discharge port 45 is connected to the in-lid oil passage 61. As shown in FIG. 4, the discharge port 45 opens on one axial side of the pump chamber 46. The discharge port 45 is connected to a gap between the external gear 42 and the internal gear 43. The discharge port 45 can discharge the oil O from the inside of the pump chamber 46, more specifically, from the gap between the external gear 42 and the internal gear 43. *
  • the reservoir 48 is connected to the pump chamber 46 on one axial side of the lower region in the vertical direction of the pump chamber 46.
  • the shape of the storage portion 48 in the axial direction is a bow shape that protrudes downward. Part of the oil O sucked into the pump chamber 46 from the suction port 44 flows into the storage portion 48.
  • the oil O that has flowed into the second shaft oil passage 97A receives a force radially outward due to the centrifugal force of the rotating second shaft 20a, and the first through holes 26a to 26a. It flows out of the second shaft 20a through 26d (that is, the second radial oil passage 97B).
  • the oil O flowing out of the first through hole 26a flows into the gap 27a.
  • the oil O which flowed into the clearance gap 27a is ejected toward the radial direction outer side from the ejection groove 24a.
  • the opening on the one axial side in the radially inner portion of the ejection groove 24 a is closed by the washer 89, so that the oil O that has flowed into the ejection groove 24 a is guided radially outward by the washer 89. It's easy to do.
  • the oil O flowing out of the first through hole 26b flows into the gap 27b.
  • the oil O which flowed into the clearance gap 27b is ejected toward the radial direction outer side from the ejection groove 25a.
  • the opening on the other axial side in the radially inner portion of the ejection groove 25a is closed by the flange portion 21f, so the oil O that has flowed into the ejection groove 25a is directed radially outward by the flange portion 21f. Easy to guide. *
  • Oil O ejected radially outward from the ejection grooves 24 a and 25 a is sprayed to the coil 32. Thereby, the coil 32 can be cooled by the oil O.
  • the second shaft oil passage 97A is provided inside the second shaft 20a, the second rotor 20 is cooled by the oil O until it is ejected from the ejection grooves 24a and 25a. You can also.
  • the oil O discharged from the discharge port 45 in the present embodiment is guided to the second rotor 20 and the second stator 30. *
  • the oil O flowing out of the first through hole 26c is supplied to the bearing 70. Since the first through hole 26d opens to the inside of the bearing holding portion 11c in the radial direction, the oil O flowing out of the first through hole 26d is supplied to the bearing 71. Thereby, the oil O can be used as a lubricant for the bearings 70 and 71.
  • FIG. 6 shows an example in which the oil O is ejected upward from the ejection grooves 24a and 25a
  • the present invention is not limited to this. Since the second rotor 20 rotates, the circumferential positions of the ejection grooves 24 a and 25 a change with the rotation of the second rotor 20. Thereby, the direction of the oil O ejected from the ejection grooves 24a and 25a changes in the circumferential direction, and the plurality of coils 32 arranged along the circumferential direction can be cooled by the oil O.
  • the second pump unit 40 can be driven by the rotation of the second shaft 20a, and the second rotor 20 is configured to suck up the oil O stored in the housing 10 by the second pump unit 40.
  • the second stator 30 and the bearings 70 and 71 can be supplied. Accordingly, the second rotor 20 and the second stator 30 can be cooled using the oil O stored in the housing 10, and the lubricity between the bearings 70 and 71 and the motor shaft main body 21 can be improved. Can be improved. *
  • the oil O discharged from the discharge port 45 can be sent to the inside of the second shaft 20a by providing the in-lid oil passage 61 and the second shaft oil passage 97A. Further, since the first through holes 26a to 26d are provided, the oil O that has flowed into the second shaft oil passage 97A can be supplied to the second stator 30 and the bearings 70 and 71. *
  • the second in-shaft oil passage 97 ⁇ / b> A provided in the second shaft 20 a is a lid that is connected to the discharge port 45 at the end on the one axial side of the second shaft 20 a. Open to the inner oil passage 61. Since the external gear 42 is fixed to the end portion on the one axial side of the second shaft 20a, the end portion on the one axial side of the second shaft 20a is relatively close to the discharge port 45. Be placed. Therefore, the length of the in-lid oil passage 61 that connects the discharge port 45 and the second in-shaft oil passage 97A can be shortened. *
  • the radially inner side surface of the attachment member 50 constitutes a part of the radially inner side surface of the second shaft oil passage 97A. Therefore, the oil O can be caused to flow from the mounting member 50 into the second shaft oil passage 97 ⁇ / b> A while fixing the external gear 42 to the mounting member 50.
  • the motor shaft main body 21 and the external gear 42 can be fixed via the mounting member 50 without changing the dimensions of the motor shaft main body 21 and the external gear 42, and the second It is easy to open the oil passage 97A in the shaft to the oil passage 61 in the lid.
  • the present invention is not limited to the above-described embodiment, and other configurations can be employed.
  • the external gear 42 may be directly fixed to the motor shaft main body 21 without using the attachment member 50.
  • the second in-shaft oil passage 97 ⁇ / b> A may be provided only inside the motor shaft main body 21, for example.
  • the attachment member 50 may be fixed to the outer peripheral surface of the motor shaft main body 21.
  • the attachment member 50 may be a member having a uniform outer diameter over the entire axial direction. That is, the outer diameter of the fitting part 51 and the outer diameter of the fixing part 52 may be the same. In this case, for example, if the outer diameter of the fixing portion 52 is made the same as the outer diameter of the fitting portion 51 shown in FIG. 4, the outer diameter of the external gear 42 to which the fixing portion 52 is fixed can be reduced. is there. Thereby, the outer diameter of the internal gear 43 can be reduced, and the inner diameter of the pump chamber 46 can be reduced. Therefore, the outer diameter of the protrusion 13d provided with the pump chamber 46 can be reduced, and the distance between the radial outer surface of the protrusion 13d and the inner peripheral surface of the second recess 12g can be increased.
  • the sensor unit 82 can be brought closer to the outer lid unit 13. Thereby, it is easy to miniaturize the entire motor 2 in the axial direction.
  • the part which protrudes in the axial direction one side among the sensor parts 82 is a coil which the sensor part 82 has, for example.
  • the attachment member 50 may be comprised by two or more members.
  • the attachment member 50 includes a first tubular member fitted into the hole portion 21g, and a second tubular member fitted to the first tubular member and extending to one side in the axial direction from the motor shaft main body 21. You may have.
  • the external gear 42 is fixed to the end portion on the one axial side of the second cylindrical member.
  • the portion of the attachment member 50 that is passed through the second through hole 13 f is the fitting portion 51 having an outer diameter smaller than that of the fixing portion 52.
  • the inner diameter of the second through hole 13f is made smaller than the outer diameter of the fixed portion 52, and the radial gap between the outer peripheral surface of the mounting member 50 and the inner peripheral surface of the second through hole 13f is made relatively small.
  • the assembler inserts the fitting portion 51 into the second through hole 13f from the left opening of the first recess 13e after attaching the outer lid portion 13 to the inner lid portion 12,
  • the mounting member 50 is fixed to the motor shaft main body 21 by being fitted into the hole 21 g of the motor shaft main body 21.
  • the radially inner end portion of the closing portion that closes the opening on the other axial side of the pump chamber 46 can be disposed more radially inward.
  • the closing portion that closes the opening on the other axial side of the pump chamber 46 is a portion on the radially outer side of the second through hole 13f in the protruding portion 13d. Since the radially inner end of the closed portion can be arranged more radially inward, the other axial direction of the pump chamber 46 can be reduced by the closed portion even if the outer diameter of the external gear 42 and the outer diameter of the internal gear 43 are made smaller.
  • the side opening can be suitably closed. Therefore, the inner diameter of the pump chamber 46 can be reduced.
  • a part of the sensor portion 82 can be disposed between the radial outer surface of the protruding portion 13d and the inner peripheral surface of the second recess 12g.
  • the motor 2 It is easy to reduce the size in the axial direction.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

One embodiment of a motor unit according to the present invention is provided with an electric power generator including a first shaft which rotates by means of a motive force of an engine, a motor having a second shaft, a housing, oil which accumulates in a lower region of an accommodating portion, and a first pump portion which is positioned inside the accommodating portion and which is driven by means of the rotation of the first shaft. An oil passage includes a first oil passage. The first oil passage includes a first sucking-up oil passage connected from the lower region of the accommodating portion to the first pump portion, a first shaft inner oil passage which is connected to a discharge port of the first pump portion and extends inside the first shaft along a first axis of rotation, a first radial oil passage which extends from the first shaft inner oil passage to a radially outer side to supply oil to a first stator, and a motor supply oil passage which extends from the discharge port of the first pump portion toward the motor to supply oil to the motor.

Description

モータユニットMotor unit
本発明は、モータユニットに関する。 The present invention relates to a motor unit.
近年、ハイブリッド車両の普及が進んでいる。ハイブリッド車両のパワートレインには、走行用のモータ、発電用の発電機および動力を伝達する伝達機構を有するモータユニットに、エンジンが接続されて構成される。ハイブリッド車両の走行時には、モータおよび発電機が発熱して高温となる。特許文献１には、モータと発電機と共通の冷却装置により冷却する構造が記載されている。 In recent years, the spread of hybrid vehicles has progressed. The power train of a hybrid vehicle is configured by connecting an engine to a motor unit having a traveling motor, a generator for power generation, and a transmission mechanism for transmitting power. When the hybrid vehicle travels, the motor and the generator generate heat and become high temperature. Patent Document 1 describes a structure in which a motor and a generator are cooled by a common cooling device.
特開２０１２－９６７３８号公報JP 2012-96738 A
従来の構造では、モータおよび発電機に冷媒であるオイルを供給するために、モータユニット外部にオイルポンプを設けていた。このため、オイルポンプに別途電力を供給する必要があった。このため、モータユニットの全体構造が複雑化するという問題があった。　 In the conventional structure, an oil pump is provided outside the motor unit in order to supply oil as a refrigerant to the motor and the generator. For this reason, it is necessary to separately supply power to the oil pump. For this reason, there existed a problem that the whole structure of a motor unit became complicated. *
本発明の一つの態様は、モータおよび発電機を同時に冷却するとともに全体構造を簡素化できるモータユニットの提供を目的の一つとする。 One aspect of the present invention is to provide a motor unit capable of simultaneously cooling the motor and the generator and simplifying the overall structure.
本発明のモータユニットの一つの態様は、エンジンに接続されるモータユニットであって、前記エンジンの動力により第１の回転軸周りを回転する第１のシャフトを有する発電機と、第２の回転軸周りを回転する第２のシャフトを有するモータと、前記エンジン、前記発電機および前記モータの間で力を伝達し、前記エンジンおよび前記モータの動力を外部に出力する伝達機構と、前記発電機および前記モータを収容する収容部を有するハウジングと、前記収容部の下部領域に溜るオイルと、前記収容部の内部に位置し前記第１のシャフトの回転により駆動される第１のポンプ部と、を備える。前記発電機は、前記第１のシャフトを有する第１のロータと、前記第１の回転軸の径方向外側から前記第１のロータを囲む第１のステータと、を有する。前記モータは、前記第２のシャフトを有する第２のロータと、前記第２の回転軸の径方向外側から前記第２のロータを囲む第２のステータと、を有する。前記収容部には、前記オイルを循環させる油路が設けられる。前記油路の経路中には、前記油路を通過する前記オイルを冷却するクーラーが設けられる。前記油路は、第１の油路を含む。前記第１の油路は、前記収容部の下部領域から前記第１のポンプ部に繋がる第１の吸い上げ油路と、前記第１のポンプ部の吐出口に繋がり前記第１の回転軸に沿って前記第１のシャフトの内部を延びる第１のシャフト内油路と、前記第１のシャフト内油路から径方向外側に延びて前記第１のステータにオイルを供給する第１の径方向油路と、前記第１のポンプ部の吐出口から前記モータに向かって延びて前記モータにオイルを供給するモータ供給油路と、を有する。 One aspect of the motor unit of the present invention is a motor unit connected to an engine, and includes a generator having a first shaft that rotates around a first rotation shaft by the power of the engine, and a second rotation A motor having a second shaft that rotates about an axis; a transmission mechanism that transmits force between the engine, the generator, and the motor; and outputs the power of the engine and the motor to the outside; and the generator And a housing having a housing portion for housing the motor, oil accumulated in a lower region of the housing portion, a first pump portion located inside the housing portion and driven by rotation of the first shaft, Is provided. The generator includes a first rotor having the first shaft, and a first stator surrounding the first rotor from a radially outer side of the first rotating shaft. The motor includes a second rotor having the second shaft, and a second stator that surrounds the second rotor from a radially outer side of the second rotating shaft. The accommodating portion is provided with an oil passage for circulating the oil. A cooler for cooling the oil passing through the oil passage is provided in the passage of the oil passage. The oil passage includes a first oil passage. The first oil passage is connected to a first suction oil passage connected from the lower region of the housing portion to the first pump portion, and a discharge port of the first pump portion, along the first rotation axis. A first in-shaft oil passage extending through the first shaft and a first in-diameter oil extending radially outward from the first in-shaft oil passage and supplying oil to the first stator. And a motor supply oil passage that extends from the discharge port of the first pump unit toward the motor and supplies oil to the motor.
本発明の一つの態様によれば、モータおよび発電機を同時に冷却するとともに全体構造を簡素化できるモータユニットが提供される。 According to one aspect of the present invention, a motor unit capable of simultaneously cooling a motor and a generator and simplifying the entire structure is provided.
図１は、一実施形態のモータユニットを有するパワートレインの概念図である。FIG. 1 is a conceptual diagram of a power train having a motor unit according to an embodiment. 図２は、一実施形態のモータユニットの断面模式図である。FIG. 2 is a schematic cross-sectional view of a motor unit according to an embodiment. 図３は、一実施形態の発電機の断面図である。FIG. 3 is a cross-sectional view of a generator according to an embodiment. 図４は、一実施形態のモータの断面図である。FIG. 4 is a cross-sectional view of a motor according to an embodiment. 図５は、一実施形態の第２のポンプ部を軸方向他方側から視た図である。 Drawing 5 is a figure which looked at the 2nd pump part of one embodiment from the other side in the direction of an axis. 図３は、一実施形態のモータの一部を示す断面図である。FIG. 3 is a cross-sectional view illustrating a part of the motor according to the embodiment.
以下、図面を参照しながら、本発明の実施形態に係るモータユニットについて説明する。なお、本発明の範囲は、以下の実施の形態に限定されず、本発明の技術的思想の範囲内で任意に変更可能である。また、以下の図面においては、各構成をわかりやすくするために、実際の構造と各構造における縮尺や数などを異ならせる場合がある。　 Hereinafter, a motor unit according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each structure easy to understand, the actual structure may be different from the scale or number in each structure. *
以下の説明では、モータユニット８が水平な路面上に位置する車両に搭載された場合の位置関係を基に、重力方向を規定して説明する。　本明細書において、「軸方向に沿って延びる」とは、厳密に軸方向（すなわち、Ｘ軸と平行な方向）に延びる場合に加えて、軸方向に対して、４５°未満の範囲で傾いた方向に延びる場合も含む。本明細書において、「～軸に沿って延びる」とは、所定の軸を中心として、軸方向に延びることを意味する。また、本明細書において、「径方向に延びる」とは、厳密に径方向、すなわち、軸方向に対して垂直な方向に延びる場合に加えて、径方向に対して、４５°未満の範囲で傾いた方向に延びる場合も含む。　 In the following description, the direction of gravity is defined and described based on the positional relationship when the motor unit 8 is mounted on a vehicle located on a horizontal road surface. In this specification, “extending along the axial direction” means not only extending in the axial direction (that is, the direction parallel to the X axis) but also tilting in a range of less than 45 ° with respect to the axial direction. This includes cases extending in the other direction. In this specification, “extending along the axis” means extending in the axial direction around a predetermined axis. Further, in this specification, “extending in the radial direction” means strictly in the range of less than 45 ° with respect to the radial direction in addition to the case of extending in the radial direction, that is, the direction perpendicular to the axial direction. Including the case of extending in an inclined direction. *
各図には、適宜Ｚ軸を示す。各図に示すＺ軸方向は、正の側を上側とし、負の側を下側とする鉛直方向Ｚである。本実施形態では、鉛直方向Ｚは、各図の上下方向である。以下の説明においては、鉛直方向上側を単に「上側」と呼び、鉛直方向下側を単に「下側」と呼ぶ。　 Each figure shows the Z-axis as appropriate. The Z-axis direction shown in each figure is a vertical direction Z in which the positive side is the upper side and the negative side is the lower side. In the present embodiment, the vertical direction Z is the vertical direction of each figure. In the following description, the upper side in the vertical direction is simply referred to as “upper side”, and the lower side in the vertical direction is simply referred to as “lower side”. *
図１は、一実施形態のモータユニット８を有するパワートレイン１の概念図である。図２は、モータユニット８の断面模式図である。　 FIG. 1 is a conceptual diagram of a power train 1 having a motor unit 8 according to an embodiment. FIG. 2 is a schematic cross-sectional view of the motor unit 8. *
パワートレイン１は、ハイブリッド自動車（ＨＥＶ）、プラグインハイブリッド自動車（ＰＨＶ）など、モータ２とエンジン９とを動力源とする車両に搭載される。　 The power train 1 is mounted on a vehicle using the motor 2 and the engine 9 as power sources, such as a hybrid vehicle (HEV) and a plug-in hybrid vehicle (PHV). *
パワートレイン１が搭載された車両（図示略）には、ＥＶモード、シリーズモード、パラレルモードの三種類の走行モードが用意される。これらの走行モードは、図示しない電子制御装置によって、車両状態や走行状態、運転者の要求出力などに応じて択一的に選択される。　 For a vehicle (not shown) on which the powertrain 1 is mounted, three types of travel modes are prepared: EV mode, series mode, and parallel mode. These travel modes are alternatively selected by an electronic control unit (not shown) according to the vehicle state, the travel state, the driver's requested output, and the like. *
図１に示すように、パワートレイン１は、モータユニット８とエンジン９とを有する。モータユニット８は、エンジン９に接続される。モータユニット８は、モータ２と、発電機３と、伝達機構（トランスアクスル）４と、ハウジング１０と、オイルＯと、第１のポンプ部３４０と、第２のポンプ部４０と、クーラー５と、を備える。　 As shown in FIG. 1, the powertrain 1 has a motor unit 8 and an engine 9. The motor unit 8 is connected to the engine 9. The motor unit 8 includes a motor 2, a generator 3, a transmission mechanism (transaxle) 4, a housing 10, an oil O, a first pump unit 340, a second pump unit 40, and a cooler 5. . *
ハウジング１０は、モータ２、発電機３、伝達機構４、第１のポンプ部３４０および第２のポンプ部４０を収容する収容部１９を有する。また、収容部１９には、オイルＯが貯留される。オイルＯは、収容部１９の下部領域に貯留される。本明細書において所定の空間の「下部領域」とは、該当する空間の鉛直方向の中心よりも下側に位置する部分を含む。　 The housing 10 includes a housing portion 19 that houses the motor 2, the generator 3, the transmission mechanism 4, the first pump portion 340, and the second pump portion 40. In addition, oil O is stored in the accommodating portion 19. The oil O is stored in the lower region of the storage unit 19. In this specification, the “lower region” of a predetermined space includes a portion located below the center in the vertical direction of the corresponding space. *
収容部１９は、モータ２を収容するモータ室１９Ａと、発電機３を収容する発電機室１９Ｂと、伝達機構４を収容するギヤ室１９Ｃと、を含む。モータ室１９Ａ、発電機室１９Ｂおよびギヤ室１９Ｃは、隔壁（第１の隔壁１８Ａおよび第２の隔壁１８Ｂ）によって互いに区画されている。すなわち、ハウジングには、第１の隔壁（隔壁）１８Ａおよび第２の隔壁１８Ｂが設けられる。　 The accommodating portion 19 includes a motor chamber 19A that accommodates the motor 2, a generator chamber 19B that accommodates the generator 3, and a gear chamber 19C that accommodates the transmission mechanism 4. The motor chamber 19A, the generator chamber 19B, and the gear chamber 19C are partitioned from each other by partition walls (first partition wall 18A and second partition wall 18B). That is, the housing is provided with a first partition (partition) 18A and a second partition 18B. *
本実施形態において、収容部１９内のオイルＯは、モータ室１９Ａおよび発電機室１９Ｂにおいて循環する。すなわち、本実施形態において、オイルＯは、ギヤ室１９Ｃに流入しない。なお、ギヤ室１９Ｃ内には、別途ギヤ潤滑用のオイルが貯留されていてもよい。　 In the present embodiment, the oil O in the accommodating portion 19 circulates in the motor chamber 19A and the generator chamber 19B. That is, in this embodiment, the oil O does not flow into the gear chamber 19C. Note that gear lubrication oil may be separately stored in the gear chamber 19C. *
発電機室１９Ｂは、モータ室１９Ａより下側に位置する。すなわち、発電機室１９Ｂは、収容部１９において最も下側に位置する。収容部１９内のオイルは、発電機室１９Ｂの下部領域に貯留される。本実施形態において、収容部１９の下部領域とは、発電機室１９Ｂの下部領域を意味する。　 The generator room 19B is located below the motor room 19A. That is, the generator room 19 </ b> B is located on the lowermost side in the housing portion 19. The oil in the accommodating part 19 is stored in the lower region of the generator room 19B. In the present embodiment, the lower region of the accommodating portion 19 means the lower region of the generator room 19B. *
発電機室１９Ｂの下部領域に溜るオイルＯの液面高さは、オイルＯの循環に伴い上下に変化する。発電機室１９Ｂの下部領域に溜るオイルＯの液面の下限高さは、発電機３の第１のステータ３３０の下端部より上側に位置する。これにより、発電機室１９Ｂの下部領域に溜るオイルＯによって、第１のステータ３３０を冷却することができる。また、発電機室１９Ｂの下部領域に溜るオイルＯの液面の上限高さは、発電機３の第１のロータ３２０の下端部より下側に位置する。これにより、発電機室１９Ｂの下部領域に溜るオイルＯが、第１のロータ３２０の回転の抵抗になることを抑制できる。　 The liquid level height of the oil O accumulated in the lower region of the generator chamber 19B changes vertically as the oil O circulates. The lower limit height of the liquid level of the oil O accumulated in the lower region of the generator chamber 19 </ b> B is located above the lower end portion of the first stator 330 of the generator 3. Accordingly, the first stator 330 can be cooled by the oil O accumulated in the lower region of the generator chamber 19B. Further, the upper limit height of the liquid level of the oil O accumulated in the lower region of the generator chamber 19 </ b> B is located below the lower end portion of the first rotor 320 of the generator 3. Thereby, it can suppress that the oil O which accumulates in the lower area | region of the generator chamber 19B becomes resistance of rotation of the 1st rotor 320. *
モータ室１９Ａと発電機室１９Ｂとは、上下方向において隣接して配置される。モータ室１９Ａは、発電機室１９Ｂの上側に配置されている。モータ室１９Ａと発電機室１９Ｂとは、第１の隔壁１８Ａによって区画されている。後段において説明するように、第１の隔壁１８Ａには、上下方向に貫通するオイル導入口１８ａが設けられる。モータ室１９Ａとギヤ室１９Ｃとは、水平方向において隣接して配置される。モータ室１９Ａとギヤ室１９Ｃとは、第２の隔壁１８Ｂによって区画されている。　 The motor chamber 19A and the generator chamber 19B are disposed adjacent to each other in the vertical direction. The motor chamber 19A is disposed above the generator chamber 19B. The motor chamber 19A and the generator chamber 19B are partitioned by the first partition wall 18A. As will be described later, the first partition wall 18A is provided with an oil introduction port 18a penetrating in the vertical direction. The motor chamber 19A and the gear chamber 19C are disposed adjacent to each other in the horizontal direction. The motor chamber 19A and the gear chamber 19C are partitioned by the second partition wall 18B. *
収容部１９には、オイルＯを循環させる油路９０が設けられる。油路９０は、第１の油路９１と第２の油路９５とを含む。油路９０の経路中には、油路９０を通過するオイルＯを冷却するクーラー５が設けられる。　 The accommodating portion 19 is provided with an oil passage 90 through which the oil O is circulated. The oil passage 90 includes a first oil passage 91 and a second oil passage 95. A cooler 5 for cooling the oil O passing through the oil passage 90 is provided in the oil passage 90. *
クーラー５は、第１の油路９１の経路中に設けられる。クーラー５は、第１の油路９１を通過するオイルＯを冷却する。また、後段に説明するように、第１の油路９１と第２の油路９５とは、収容部１９の下部領域において合流する。したがって、クーラー５で冷却された第１の油路９１を通過したオイルＯは、収容部１９の下部領域で第２の油路９５を通過したオイルＯと混ざり合う。したがって、クーラー５は、油路９０中の全てのオイルＯを冷却することができる。　 The cooler 5 is provided in the path of the first oil path 91. The cooler 5 cools the oil O that passes through the first oil passage 91. Further, as will be described later, the first oil passage 91 and the second oil passage 95 merge in the lower region of the accommodating portion 19. Therefore, the oil O that has passed through the first oil passage 91 cooled by the cooler 5 is mixed with the oil O that has passed through the second oil passage 95 in the lower region of the housing portion 19. Therefore, the cooler 5 can cool all the oil O in the oil passage 90. *
図２に示すように、クーラー５は、ハウジング１０の外周面に固定される。本実施形態において、クーラー５は、ハウジング１０のうち発電機室１９Ｂを囲む発電機収容本体部３１１の外周面に固定される。クーラー５は、第１の回転軸Ｊ１の径方向と直交する設置面５ａを有する。クーラー５は、設置面５ａにおいて、ハウジング１０の外周面と接触する。設置面５ａは、ハウジング１０の壁部を介して発電機３と対向する。このため、クーラー５は、ハウジング１０の壁部を介して発電機３を冷却することができる。　 As shown in FIG. 2, the cooler 5 is fixed to the outer peripheral surface of the housing 10. In the present embodiment, the cooler 5 is fixed to the outer peripheral surface of the generator housing main body 311 surrounding the generator chamber 19 </ b> B in the housing 10. The cooler 5 has an installation surface 5a orthogonal to the radial direction of the first rotation axis J1. The cooler 5 is in contact with the outer peripheral surface of the housing 10 on the installation surface 5a. The installation surface 5 a faces the generator 3 through the wall portion of the housing 10. For this reason, the cooler 5 can cool the generator 3 through the wall portion of the housing 10. *
クーラー５の設置面５ａの下端部は、発電機３の第１のロータ３２０の下端部より下側に位置する。上述したように、発電機室１９Ｂの下部領域に溜るオイルＯの液面高さは、第１のロータ３２０の下側において上下に変化する。本実施形態によれば、クーラー５の設置面５ａを介して、発電機室１９Ｂの下部領域に溜るオイルＯを冷却して、オイルＯを介して発電機３の第１のステータ３３０を効果的に冷却できる。　 The lower end portion of the installation surface 5 a of the cooler 5 is located below the lower end portion of the first rotor 320 of the generator 3. As described above, the liquid level height of the oil O accumulated in the lower region of the generator chamber 19 </ b> B changes up and down on the lower side of the first rotor 320. According to the present embodiment, the oil O accumulated in the lower region of the generator chamber 19B is cooled via the installation surface 5a of the cooler 5, and the first stator 330 of the generator 3 is effectively effective via the oil O. Can be cooled. *
発電機３はモータとしての機能と発電機としての機能とを兼ね備えた電動発電機である。発電機３はエンジン９を始動させる際に電動機（スターター）として機能し、エンジン９の作動時にはエンジン動力で発電を実施する。　 The generator 3 is a motor generator having both a function as a motor and a function as a generator. The generator 3 functions as an electric motor (starter) when starting the engine 9, and generates power with engine power when the engine 9 is operated. *
図１に示すように、発電機３は、エンジン９の動力により発電する。発電機３は、第１のロータ３２０と、第１のロータ３２０を囲む第１のステータ３３０と、を有する。　 As shown in FIG. 1, the generator 3 generates power using the power of the engine 9. The generator 3 includes a first rotor 320 and a first stator 330 that surrounds the first rotor 320. *
第１のロータ３２０は、第１の回転軸Ｊ１を中心に回転可能である。第１のロータ３２０は、第１のシャフト３２０ａを有する。すなわち、発電機３は、第１の回転軸Ｊ１周りを回転する第１のシャフト３２０ａを有する。第１のシャフト３２０ａの端部には、第１のポンプ部３４０が設けられる。第１のシャフト３２０ａの他方側の端部は、エンジン９のクランクシャフト（図示略）に接続される。このため、第１のシャフト３２０ａは、エンジン９の動力により回転する。　 The first rotor 320 is rotatable about the first rotation axis J1. The first rotor 320 has a first shaft 320a. That is, the generator 3 has a first shaft 320a that rotates around the first rotation axis J1. A first pump unit 340 is provided at the end of the first shaft 320a. The other end of the first shaft 320a is connected to a crankshaft (not shown) of the engine 9. For this reason, the first shaft 320 a is rotated by the power of the engine 9. *
第１のステータ３３０は、環状である。第１のステータ３３０は、第１のロータ３２０を第１の回転軸Ｊ１の径方向外側から囲む。　 The first stator 330 is annular. The first stator 330 surrounds the first rotor 320 from the outside in the radial direction of the first rotation axis J1. *
第１のポンプ部３４０は、収容部１９の内部に位置する。また、第１のポンプ部３４０は、発電機３に対して第１の回転軸Ｊ１の軸方向一方側に位置する。第１のポンプ部３４０は、第１のシャフト３２０ａの回転により駆動される。上述したように、第１のシャフト３２０ａは、エンジン９により回転させられる。このため、第１のポンプ部３４０は、エンジン９により駆動する。本実施形態の第１のポンプ部３４０は、トロコイダルポンプ
である。　 The first pump unit 340 is located inside the storage unit 19. The first pump unit 340 is located on one axial side of the first rotating shaft J1 with respect to the generator 3. The first pump unit 340 is driven by the rotation of the first shaft 320a. As described above, the first shaft 320 a is rotated by the engine 9. For this reason, the first pump unit 340 is driven by the engine 9. The 1st pump part 340 of this embodiment is a trochoidal pump.
モータ２は、発電機３の上側に位置する。モータ２は、電動機としての機能と発電機としての機能とを兼ね備えた電動発電機である。モータ２は、主に電動機として機能して車両を駆動し、回生時には発電機として機能する。　 The motor 2 is located above the generator 3. The motor 2 is a motor generator that has both a function as a motor and a function as a generator. The motor 2 mainly functions as an electric motor to drive the vehicle, and functions as a generator during regeneration. *
モータ２は、第２のロータ２０と、第２のステータ３０と、を有する。　第２のロータ２０は、第２の回転軸Ｊ２を中心に回転可能である。第２の回転軸Ｊ２は、第１の回転軸Ｊ１と平行に延びる。第２のロータ２０は、第２のシャフト２０ａを有する。すなわち、モータ２は、第２の回転軸Ｊ２周りを回転する第２のシャフト２０ａを有する。第２のシャフト２０ａの一方側の端部には、第２のポンプ部４０が設けられる。また、第２のシャフト２０ａの他方側の端部は、伝達機構４に接続される。モータ２の動力は、伝達機構４を介して外部に出力される。　 The motor 2 has a second rotor 20 and a second stator 30. The second rotor 20 can rotate around the second rotation axis J2. The second rotation axis J2 extends in parallel with the first rotation axis J1. The second rotor 20 has a second shaft 20a. That is, the motor 2 has a second shaft 20a that rotates around the second rotation axis J2. A second pump unit 40 is provided at one end of the second shaft 20a. The other end of the second shaft 20 a is connected to the transmission mechanism 4. The power of the motor 2 is output to the outside via the transmission mechanism 4. *
第２のステータ３０は、環状である。第２のステータ３０は、第２のロータ２０を第２の回転軸Ｊ２の径方向外側から囲む。　 The second stator 30 is annular. The second stator 30 surrounds the second rotor 20 from the outside in the radial direction of the second rotation axis J2. *
第２のポンプ部４０は、収容部１９の内部に位置する。また、第２のポンプ部４０は、モータ２に対して第２の回転軸Ｊ２の軸方向一方側に位置する。第２のポンプ部４０は、第２のシャフト２０ａの回転により駆動される。すなわち、第２のポンプ部４０は、モータ２により駆動する。本実施形態の第２のポンプ部４０は、第１のポンプ部３４０と同様に、トロコイダルポンプである。　 The second pump unit 40 is located inside the storage unit 19. Further, the second pump unit 40 is located on one axial side of the second rotating shaft J2 with respect to the motor 2. The second pump unit 40 is driven by the rotation of the second shaft 20a. That is, the second pump unit 40 is driven by the motor 2. Similar to the first pump unit 340, the second pump unit 40 of the present embodiment is a trochoidal pump. *
伝達機構４は、エンジン９、発電機３およびモータ２間で力を伝達する。伝達機構４は、駆動源と被駆動装置との間の動力伝達を担う複数の機構を内蔵する。伝達機構４はエンジン９およびモータ２の動力を外部に出力する。　 The transmission mechanism 4 transmits force between the engine 9, the generator 3 and the motor 2. The transmission mechanism 4 incorporates a plurality of mechanisms responsible for power transmission between the drive source and the driven device. The transmission mechanism 4 outputs the power of the engine 9 and the motor 2 to the outside. *
伝達機構４は、例えば、クラッチ機構（図示略）と、複数のギヤ（図示略）と、デファレンシャルギヤ（図示略）と、出力シャフト（図示略）と、を有する。　伝達機構４は、複数のギヤを介して、エンジン９の動力およびモータ２の動力をそれぞれデファレンシャルギヤに伝達する。　デファレンシャルギヤは、モータ２およびエンジン９から出力されるトルクを車両の車輪に伝達するための装置である。差動装置は、車両の旋回時に、左右の車輪の速度差を吸収しつつ、左右両輪の出力シャフトに同トルクを伝える。　クラッチ機構は、モータ２の動力のみで車両を走行させる場合に、エンジン９の動力伝達経路を切断する。また、クラッチ機構は、モータ２の動力およびエンジン９の動力を両方使って車両を走行させる場合に、エンジン９の動力伝達経路を繋げる。　 The transmission mechanism 4 includes, for example, a clutch mechanism (not shown), a plurality of gears (not shown), a differential gear (not shown), and an output shaft (not shown). The transmission mechanism 4 transmits the power of the engine 9 and the power of the motor 2 to the differential gear through a plurality of gears. The differential gear is a device for transmitting torque output from the motor 2 and the engine 9 to the wheels of the vehicle. The differential device transmits the same torque to the output shafts of the left and right wheels while absorbing the speed difference between the left and right wheels when the vehicle turns. The clutch mechanism cuts the power transmission path of the engine 9 when the vehicle is driven only by the power of the motor 2. The clutch mechanism connects the power transmission path of the engine 9 when the vehicle travels using both the power of the motor 2 and the power of the engine 9. *
＜油路＞



　次に油路９０についてより具体的に説明する。上述したように、油路９０は、第１の油路９１と第２の油路９５とを有する。第１の油路９１および第２の油路９５は、それぞれモータ２および発電機３の両方を冷却する油路である。　 <Oil channel>



Next, the oil passage 90 will be described more specifically. As described above, the oil passage 90 includes the first oil passage 91 and the second oil passage 95. The first oil passage 91 and the second oil passage 95 are oil passages for cooling both the motor 2 and the generator 3, respectively.
（第１の油路）



　第１の油路９１は、第１の吸い上げ油路９２と、第１のシャフト内油路９３Ａと、第１の径方向油路９３Ｂと、モータ供給油路９４と、を有する。　 (First oil passage)



The first oil passage 91 includes a first suction oil passage 92, a first in-shaft oil passage 93 </ b> A, a first radial oil passage 93 </ b> B, and a motor supply oil passage 94.
第１の吸い上げ油路９２は、例えばハウジング１０の周壁部の内部に設けられる。第１の吸い上げ油路９２は、収容部１９の下部領域から第１のポンプ部３４０に繋がる。上述したようにオイルＯは、収容部１９の下部領域（より具体的には、発電機室１９Ｂの下部領域）に溜まる。第１の吸い上げ油路９２は、上流側の端部において、発電機室１９Ｂの下部領域に開口する。また、第１の吸い上げ油路９２は、下流側の端部において、第１のポンプ部３４０に繋がる。第１の吸い上げ油路９２の下流側の端部には、第１のポンプ部３４０から負圧が付与される。第１の吸い上げ油路９２には、収容部１９の下部領域から第１のポンプ部３４０によって吸い上げられたオイルＯが流れる。　 The first siphoning oil path 92 is provided, for example, inside the peripheral wall portion of the housing 10. The first suction oil passage 92 is connected to the first pump unit 340 from the lower region of the housing unit 19. As described above, the oil O accumulates in the lower region of the accommodating portion 19 (more specifically, the lower region of the generator chamber 19B). The first siphoning oil passage 92 opens in the lower region of the generator chamber 19B at the upstream end. Further, the first suction oil passage 92 is connected to the first pump unit 340 at the downstream end. A negative pressure is applied to the downstream end of the first suction oil passage 92 from the first pump unit 340. The oil O sucked up by the first pump unit 340 flows from the lower region of the housing part 19 through the first suction oil path 92. *
第１の吸い上げ油路９２の経路中には、クーラー５が設けられる。クーラー５は、第１の吸い上げ油路９２を通過するオイルＯを冷却する。　 A cooler 5 is provided in the path of the first suction oil path 92. The cooler 5 cools the oil O that passes through the first suction oil passage 92. *
第１のシャフト内油路９３Ａは、第１の回転軸Ｊ１に沿って第１のシャフト３２０ａの内部を延びる。後段において説明するように、第１のシャフト３２０ａは、中空シャフトである。第１のシャフト内油路９３Ａは、第１のシャフト３２０ａの中空部分に設けられた油路である。第１のシャフト３２０ａの中空部分は、第１の回転軸Ｊ１の軸方向の一方側に開口する。また、第１のシャフト内油路９３Ａは、軸方向他方側の他方側において閉塞する。第１のシャフト３２０ａの中空部分の開口は、第１のシャフト内油路９３Ａの上流側の端部に位置する。第１のシャフト３２０ａの中空部分の開口は、第１のポンプ部３４０の吐出口３４５に繋がる。オイルＯは、第１のシャフト内油路９３Ａの軸方向一方側から他方側に向かって流れる。　 The first in-shaft oil passage 93A extends inside the first shaft 320a along the first rotation axis J1. As will be described later, the first shaft 320a is a hollow shaft. The first shaft oil passage 93A is an oil passage provided in a hollow portion of the first shaft 320a. The hollow portion of the first shaft 320a opens on one side in the axial direction of the first rotation axis J1. The first in-shaft oil passage 93A is closed on the other side in the other axial direction. The opening of the hollow portion of the first shaft 320a is located at the upstream end of the first shaft oil passage 93A. The opening of the hollow portion of the first shaft 320 a is connected to the discharge port 345 of the first pump unit 340. The oil O flows from one axial side of the first in-shaft oil passage 93A toward the other side. *
第１の径方向油路９３Ｂは、第１のシャフト内油路９３Ａに繋がる。第１の径方向油路９３Ｂは、第１のシャフト内油路９３Ａから径方向外側に延びる。第１の径方向油路９３Ｂは、第１のシャフト３２０ａを含む第１のロータ３２０内に設けられる。第１の径方向油路９３Ｂには、第１のシャフト内油路９３ＡからオイルＯが流入する。第１のロータ３２０は、第１の回転軸Ｊ１周りを回転する。このため、第１の径方向油路９３Ｂ内のオイルＯには、径方向外側に向かって遠心力が生じる。これにより、第１の径方向油路９３Ｂ内のオイルＯは、径方向外側にスムーズに流れる。　 The first radial oil passage 93B is connected to the first in-shaft oil passage 93A. The first radial oil passage 93B extends radially outward from the first shaft oil passage 93A. The first radial oil passage 93B is provided in the first rotor 320 including the first shaft 320a. Oil O flows from the first in-shaft oil passage 93A into the first radial oil passage 93B. The first rotor 320 rotates around the first rotation axis J1. For this reason, centrifugal force is generated in the oil O in the first radial oil passage 93B toward the radially outer side. As a result, the oil O in the first radial oil passage 93B flows smoothly outward in the radial direction. *
第１の径方向油路９３Ｂは、第１の回転軸Ｊ１の径方向外側の端部において、第１のステータ３３０に向かって開口する。第１の径方向油路９３Ｂは、発電機３の第１のステータ３３０にオイルＯを供給する。第１のステータ３３０に供給されたオイルＯは、第１のステータ３３０を冷却し、さらに第１のステータ３３０のコイルなどを伝って下側に滴下する。これにより、オイルＯは、発電機室１９Ｂの下部領域に回収される。　 The first radial oil passage 93B opens toward the first stator 330 at the radially outer end of the first rotating shaft J1. The first radial oil passage 93 </ b> B supplies oil O to the first stator 330 of the generator 3. The oil O supplied to the first stator 330 cools the first stator 330 and further drops downward through the coil of the first stator 330 and the like. As a result, the oil O is recovered in the lower region of the generator chamber 19B. *
本実施形態によれば、第１のシャフト内油路９３Ａおよび第１の径方向油路９３Ｂによって発電機３の内部にオイルＯを供給して、発電機３を内部から冷却できる。これにより、発電機３を効率的に冷却できる。　 According to this embodiment, the oil O can be supplied into the generator 3 by the first in-shaft oil passage 93A and the first radial oil passage 93B, and the generator 3 can be cooled from the inside. Thereby, the generator 3 can be cooled efficiently. *
モータ供給油路９４は、例えばハウジング１０の周壁部の内部に設けられる。モータ供給油路９４は、第１のポンプ部３４０の吐出口３４５からモータ２に向かって延びる。モータ供給油路９４は、上流側の端部において第１のポンプ部３４０の吐出口３４５に繋がる。すなわち、第１の油路９１は、第１のポンプ部３４０の吐出口３４５において、第１のシャフト内油路９３Ａとモータ供給油路９４とに分岐される。　 The motor supply oil passage 94 is provided, for example, inside the peripheral wall portion of the housing 10. The motor supply oil passage 94 extends from the discharge port 345 of the first pump unit 340 toward the motor 2. The motor supply oil passage 94 is connected to the discharge port 345 of the first pump unit 340 at the upstream end. That is, the first oil passage 91 is branched into the first in-shaft oil passage 93 </ b> A and the motor supply oil passage 94 at the discharge port 345 of the first pump unit 340. *
本実施形態によれば、第１のポンプ部３４０によって、発電機３の内部にオイルＯを供給するとともに、モータ２にオイルＯを供給できる。このため、第１のポンプ部３４０を用いて、発電機３およびモータ２を同時に冷却することができる。　 According to this embodiment, the oil O can be supplied to the motor 2 while the oil O is supplied into the generator 3 by the first pump unit 340. For this reason, the generator 3 and the motor 2 can be simultaneously cooled using the first pump unit 340. *
本実施形態によれば、クーラー５は、第１の吸い上げ油路９２の経路中に設けられる。第１の油路９１は、第１の吸い上げ油路９２の下流において分岐して、発電機３とモータ２とにオイルＯを供給する。本実施形態によれば、クーラー５を分岐の上流側に配置することで、クーラー５によって冷却されたオイルＯにより発電機３とモータ２とを効率的に冷却できる。　 According to the present embodiment, the cooler 5 is provided in the path of the first siphoning oil path 92. The first oil passage 91 branches downstream of the first suction oil passage 92 and supplies oil O to the generator 3 and the motor 2. According to the present embodiment, the generator 3 and the motor 2 can be efficiently cooled by the oil O cooled by the cooler 5 by arranging the cooler 5 on the upstream side of the branch. *
モータ供給油路９４は、下流側の端部において、モータ２の上側に開口する。モータ供給油路９４は、モータ２の上側からモータ２の第２のステータ３０に、オイルＯを供給する。モータ２に供給されたオイルＯは、モータ２表面を伝ってモータ２全体を冷却する。すなわち、本実施形態によれば、モータ供給油路９４がモータ２の上側からモータ２にオイルＯを供給することで、モータ２全体を効率的に冷却できる。　 The motor supply oil passage 94 opens above the motor 2 at the downstream end. The motor supply oil passage 94 supplies oil O from the upper side of the motor 2 to the second stator 30 of the motor 2. The oil O supplied to the motor 2 travels along the surface of the motor 2 and cools the entire motor 2. That is, according to the present embodiment, the motor supply oil passage 94 supplies the oil O from the upper side of the motor 2 to the motor 2 so that the entire motor 2 can be efficiently cooled. *
本実施形態によれば、第１のポンプ部３４０が収容部１９の内部に設けられるため、ポンプ部がモータユニットの外部に設けられる場合と比較して、第１のポンプ部３４０とモータユニット８とを繋ぐ配管等を必要としない。すなわち、本実施形態によれば、モータユニット８の構造を簡素化することができる。　 According to the present embodiment, since the first pump unit 340 is provided inside the housing unit 19, the first pump unit 340 and the motor unit 8 are compared with the case where the pump unit is provided outside the motor unit. No piping is required to connect That is, according to this embodiment, the structure of the motor unit 8 can be simplified. *
本実施形態によれば、第１のポンプ部３４０が第１のシャフト３２０ａの回転により駆動されるため、ポンプ部を外部電源により駆動する場合と比較して、第１のポンプ部３４０に繋がる電気配線等を必要としない。すなわち、本実施形態によれば、モータユニット８の構造を簡素化できる。　 According to the present embodiment, since the first pump unit 340 is driven by the rotation of the first shaft 320a, compared with the case where the pump unit is driven by an external power source, the electricity connected to the first pump unit 340 is connected. No wiring is required. That is, according to this embodiment, the structure of the motor unit 8 can be simplified. *
本実施形態において、第１のポンプ部３４０は、発電機３の第１のシャフト３２０ａの回転により駆動されるため、第１のポンプ部３４０は、発電機３が発電する際にのみ駆動する。第１のポンプ部３４０は、発電機３の内部にオイルＯを供給して発電機３を冷却する。発電機３が発熱するのは、発電機３の発電時である。すなわち、本実施形態によれば、発電機３の発熱時にのみ駆動して、発電機３を冷却するためのオイルＯを発電機３に供給するため、効率的に発電機３を冷却できる。また一般的に、ハイブリッド車両において、発電機３の発電時には、モータ２が常に駆動する。本実施形態によれば、発電機３の駆動時に同時にモータ２を冷却することができ、効率的なモータ２の冷却が可能となる。　 In the present embodiment, since the first pump unit 340 is driven by the rotation of the first shaft 320a of the generator 3, the first pump unit 340 is driven only when the generator 3 generates power. The first pump unit 340 supplies oil O to the inside of the generator 3 to cool the generator 3. The generator 3 generates heat when the generator 3 generates power. That is, according to the present embodiment, the generator 3 is driven only when the generator 3 generates heat, and the oil O for cooling the generator 3 is supplied to the generator 3. Therefore, the generator 3 can be efficiently cooled. In general, in a hybrid vehicle, the motor 2 is always driven when the generator 3 generates power. According to the present embodiment, the motor 2 can be cooled simultaneously when the generator 3 is driven, and the motor 2 can be efficiently cooled. *
（第２の油路）



　第２の油路９５は、第２の吸い上げ油路９６と、第２のシャフト内油路９７Ａと、第２の径方向油路９７Ｂと、を有する。　 (Second oil passage)



The second oil passage 95 includes a second suction oil passage 96, a second shaft oil passage 97A, and a second radial oil passage 97B.
第２の吸い上げ油路９６は、例えばハウジング１０の周壁部の内部に設けられる。第２の吸い上げ油路９６は、収容部１９の下部領域から第２のポンプ部４０に繋がる。第２の吸い上げ油路９６は、上流側の端部において、発電機室１９Ｂの下部領域に開口する。また、第２の吸い上げ油路９６は、下流側の端部において、第２のポンプ部４０に繋がる。第２の吸い上げ油路９６の下流側の端部には、第２のポンプ部４０から負圧が付与される。第２の吸い上げ油路９６には、収容部１９の下部領域から第２のポンプ部４０によって吸い上げられたオイルＯが流れる。　 The second siphoning oil passage 96 is provided, for example, inside the peripheral wall portion of the housing 10. The second suction oil passage 96 is connected to the second pump unit 40 from the lower region of the housing unit 19. The second suction oil passage 96 opens to the lower region of the generator chamber 19B at the upstream end. The second suction oil passage 96 is connected to the second pump unit 40 at the downstream end. A negative pressure is applied from the second pump unit 40 to the downstream end of the second suction oil passage 96. The oil O sucked up by the second pump unit 40 flows from the lower region of the storage unit 19 through the second suction oil passage 96. *
第２のシャフト内油路９７Ａは、第２の回転軸Ｊ２に沿って第２のシャフト２０ａの内部を延びる。後段において説明するように、第２のシャフト２０ａは、中空シャフトである。第２のシャフト内油路９７Ａは、第２のシャフト２０ａの中空部分に設けられた油路である。第２のシャフト２０ａの中空部分は、第２の回転軸Ｊ２の軸方向の一方側に開口する。また、第２のシャフト内油路９７Ａは、軸方向他方側の他方側において閉塞する。第２のシャフト２０ａの中空部分の開口は、第２のシャフト内油路９７Ａの上流側の端部に位置する。第２のシャフト２０ａの中空部分の開口は、第２のポンプ部４０の吐出口４５に繋がる。オイルＯは、第２のシャフト内油路９７Ａの軸方向一方側から他方側に向かって流れる。　 The second shaft oil passage 97A extends inside the second shaft 20a along the second rotation axis J2. As will be described later, the second shaft 20a is a hollow shaft. The second shaft internal oil passage 97A is an oil passage provided in a hollow portion of the second shaft 20a. The hollow portion of the second shaft 20a opens on one side in the axial direction of the second rotation axis J2. The second shaft internal oil passage 97A is closed on the other side in the other axial direction. The opening of the hollow portion of the second shaft 20a is located at the upstream end of the second in-shaft oil passage 97A. The opening of the hollow portion of the second shaft 20 a is connected to the discharge port 45 of the second pump unit 40. The oil O flows from one axial side of the second shaft oil passage 97A toward the other side. *
第２の径方向油路９７Ｂは、第２のシャフト内油路９７Ａに繋がる。第２の径方向油路９７Ｂは、第２のシャフト内油路９７Ａから径方向外側に延びる。第２の径方向油路９７Ｂは、第２のシャフト２０ａを含む第２のロータ２０内に設けられる。第２の径方向油路９７Ｂには、第２のシャフト内油路９７ＡからオイルＯが流入する。第２のロータ２０は、第２の回転軸Ｊ２周りを回転する。このため、第２の径方向油路９７Ｂ内のオイルＯには、径方向外側に向かって遠心力が生じる。これにより、第２の径方向油路９７Ｂ内のオイルＯは、径方向外側にスムーズに流れる。　 The second radial oil passage 97B is connected to the second in-shaft oil passage 97A. The second radial oil passage 97B extends radially outward from the second shaft oil passage 97A. The second radial oil passage 97B is provided in the second rotor 20 including the second shaft 20a. Oil O flows from the second shaft oil passage 97A into the second radial oil passage 97B. The second rotor 20 rotates around the second rotation axis J2. For this reason, centrifugal force is generated in the oil O in the second radial oil passage 97B toward the radially outer side. Thereby, the oil O in the second radial oil passage 97B flows smoothly outward in the radial direction. *
第２の径方向油路９７Ｂは、第２の回転軸Ｊ２の径方向外側の端部において、第２のステータ３０に向かって開口する。第２の径方向油路９７Ｂは、モータ２の第２のステータ３０にオイルＯを供給する。これにより、モータ２の第２のステータ３０が冷却される。　 The second radial oil passage 97B opens toward the second stator 30 at the radially outer end of the second rotating shaft J2. The second radial oil passage 97 </ b> B supplies oil O to the second stator 30 of the motor 2. As a result, the second stator 30 of the motor 2 is cooled. *
本実施形態によれば、第２のシャフト内油路９７Ａおよび第２の径方向油路９７Ｂによってモータ２の内部にオイルＯを供給して、モータ２を内部から冷却することができる。これにより、モータ２を効率的に冷却することができる。　 According to this embodiment, the oil O can be supplied to the inside of the motor 2 by the second in-shaft oil passage 97A and the second radial oil passage 97B, and the motor 2 can be cooled from the inside. Thereby, the motor 2 can be cooled efficiently. *
本実施形態によれば、第２のポンプ部４０が収容部１９の内部に設けられるため、ポンプ部がモータユニットの外部に設けられる場合と比較して、第２のポンプ部４０とモータユニット８とを繋ぐ配管等を必要としない。すなわち、本実施形態によれば、モータユニット８の構造を簡素化できる。　 According to the present embodiment, since the second pump unit 40 is provided inside the housing unit 19, the second pump unit 40 and the motor unit 8 are compared with the case where the pump unit is provided outside the motor unit. No piping is required to connect That is, according to this embodiment, the structure of the motor unit 8 can be simplified. *
本実施形態によれば、第２のポンプ部４０が第２のシャフト２０ａの回転により駆動されるため、ポンプ部を外部電源により駆動する場合と比較して、第２のポンプ部４０に繋がる電気配線等を必要としない。すなわち、本実施形態によれば、モータユニット８の構造を簡素化することができる。　 According to the present embodiment, since the second pump unit 40 is driven by the rotation of the second shaft 20a, compared with the case where the pump unit is driven by an external power source, the electric connected to the second pump unit 40 is achieved. No wiring is required. That is, according to this embodiment, the structure of the motor unit 8 can be simplified. *
本実施形態において、第２のポンプ部４０は、モータ２の第２のシャフト２０ａの回転により駆動されるため、第２のポンプ部４０は、モータ２の駆動と同時に駆動する。第２のポンプ部４０は、モータ２の内部にオイルＯを供給して発電機３を冷却する。モータ２が発熱するのは、モータ２の駆動時である。すなわち、本実施形態によれば、モータ２の発熱時にのみ駆動して、モータ２を冷却するためのオイルＯをモータ２に供給するため、効率的にモータ２を冷却できる。　 In the present embodiment, since the second pump unit 40 is driven by the rotation of the second shaft 20 a of the motor 2, the second pump unit 40 is driven simultaneously with the driving of the motor 2. The second pump unit 40 supplies oil O to the inside of the motor 2 to cool the generator 3. The motor 2 generates heat when the motor 2 is driven. That is, according to the present embodiment, the motor 2 is driven only when the motor 2 generates heat and the oil O for cooling the motor 2 is supplied to the motor 2, so that the motor 2 can be efficiently cooled. *
（共有油路）



　次に、第１の油路９１および第２の油路９５が共有する油路について説明する。　第１の油路９１および第２の油路９５は、ともにモータ２の第２のステータ３０にオイルＯを供給する。このため、第１の油路９１および第２の油路９５は、オイルＯが第２のステータ３０から発電機室１９Ｂの下部領域に達する経路を共有する。　 (Shared oil passage)



Next, the oil passage shared by the first oil passage 91 and the second oil passage 95 will be described. Both the first oil passage 91 and the second oil passage 95 supply oil O to the second stator 30 of the motor 2. For this reason, the first oil passage 91 and the second oil passage 95 share a route through which the oil O reaches the lower region of the generator chamber 19B from the second stator 30.
第２のステータ３０に供給されたオイルＯは、第２のステータ３０を冷却し、さらに第２のステータ３０のコイルなどを伝って下側に滴下する。第２のステータ３０から滴下したオイルＯは、モータ室１９Ａの下部領域に達する。ハウジング１０には、モータ室１９Ａと発電機室１９Ｂとを区画する第１の隔壁１８Ａが設けられる。第１の隔壁１８Ａには、上下方向に貫通するオイル導入口１８ａが設けられる。モータ室１９Ａの下部領域に達したオイルＯは、オイル導入口１８ａを介して、発電機室１９Ｂに導入される。オイル導入口１８ａは、発電機３の直上で開口する。このため、オイル導入口１８ａを介して発電機室１９Ｂに導入されたオイルＯは、発電機３の第１のステータ３３０に供給される。第１のステータ３３０に供給されたオイルＯは、第１のステータ３３０を冷却し、さらに第１のステータ３３０のコイルなどを伝って下側に滴下する。これにより、オイルＯは、発電機室１９Ｂの下部領域に回収される。　 The oil O supplied to the second stator 30 cools the second stator 30 and further drops down through the coil of the second stator 30 and the like. The oil O dropped from the second stator 30 reaches the lower region of the motor chamber 19A. The housing 10 is provided with a first partition wall 18A that partitions the motor chamber 19A and the generator chamber 19B. The first partition wall 18A is provided with an oil inlet 18a penetrating in the vertical direction. The oil O reaching the lower region of the motor chamber 19A is introduced into the generator chamber 19B through the oil introduction port 18a. The oil introduction port 18 a is opened immediately above the generator 3. For this reason, the oil O introduced into the generator chamber 19 </ b> B via the oil introduction port 18 a is supplied to the first stator 330 of the generator 3. The oil O supplied to the first stator 330 cools the first stator 330 and further drops downward through the coil of the first stator 330 and the like. As a result, the oil O is recovered in the lower region of the generator chamber 19B. *
本実施形態によれば、モータ２が発電機３の上側に位置し、モータ２から滴下したオイルＯが発電機３に供給される。このため、モータ２を冷却したオイルＯを、さらに発電機３の冷却に用いることができ、結果的に効率的な冷却が可能となる。　 According to this embodiment, the motor 2 is positioned above the generator 3, and the oil O dripped from the motor 2 is supplied to the generator 3. For this reason, the oil O which cooled the motor 2 can be further used for cooling the generator 3, and as a result, efficient cooling becomes possible. *



＜発電機＞



　次に発電機３の具体的な構成について説明する。　図３に示すように、本実施形態の発電機３は、ハウジング１０と、一方向に延びる第１の回転軸Ｊ１に沿って配置される第１のシャフト３２０ａを有する第１のロータ３２０と、回転検出部３８０と、第１のステータ３３０と、第１のポンプ部３４０と、ベアリング３７０，３７１と、を備える。　


<Generator>



Next, a specific configuration of the generator 3 will be described. As shown in FIG. 3, the generator 3 of the present embodiment includes a housing 10, a first rotor 320 having a first shaft 320 a disposed along a first rotation axis J <b> 1 extending in one direction, A rotation detection unit 380, a first stator 330, a first pump unit 340, and bearings 370 and 371 are provided.
第１の回転軸Ｊ１は、図３の左右方向に延びる。以下の発電機３の説明においては、第１の回転軸Ｊ１の軸方向と平行な方向を単に「軸方向」と呼び、第１の回転軸Ｊ１を中心とする径方向を単に「径方向」と呼び、第１の回転軸Ｊ１を中心とする周方向を単に「周方向」と呼ぶ。また、軸方向のうち図３の左側を、「軸方向一方側」と呼び、軸方向のうち図３の右側を、「軸方向他方側」と呼ぶ。　 The first rotation axis J1 extends in the left-right direction in FIG. In the following description of the generator 3, the direction parallel to the axial direction of the first rotation axis J1 is simply referred to as “axial direction”, and the radial direction around the first rotation axis J1 is simply “radial direction”. The circumferential direction around the first rotation axis J1 is simply referred to as “circumferential direction”. Also, the left side of FIG. 3 in the axial direction is referred to as “one axial side”, and the right side of FIG. 3 in the axial direction is referred to as “the other axial side”. *
ハウジング１０は、発電機収容本体部３１１と、内蓋部３１２と、外蓋部３１３と、を有する。本実施形態において発電機収容本体部３１１と内蓋部３１２と外蓋部３１３とは、互いに別部材である。発電機収容本体部３１１は、軸方向一方側に開口する有底の筒状である。発電機収容本体部３１１は、底部３１１ａと、本体筒部３１１ｂと、ベアリング保持部３１１ｃと、を有する。底部３１１ａは、径方向に拡がる円環板状である。本体筒部３１１ｂは、底部３１１ａの径方向外縁部から軸方向一方側に延びる円筒状である。ベアリング保持部３１１ｃは、底部３１１ａの内縁部から軸方向一方側に突出する円筒状である。ベアリング保持部３１１ｃは、内周面にベアリング３７１を保持する。　 The housing 10 includes a generator housing body 311, an inner lid portion 312, and an outer lid portion 313. In the present embodiment, the generator housing main body 311, the inner lid 312, and the outer lid 313 are separate members. The generator housing body 311 has a bottomed cylindrical shape that opens to one side in the axial direction. The generator housing main body 311 has a bottom 311a, a main body cylinder 311b, and a bearing holding portion 311c. The bottom 311a has an annular plate shape that expands in the radial direction. The main body cylinder portion 311b has a cylindrical shape extending from the radially outer edge portion of the bottom portion 311a to one side in the axial direction. The bearing holding portion 311c has a cylindrical shape protruding from the inner edge portion of the bottom portion 311a to one side in the axial direction. The bearing holding portion 311c holds the bearing 371 on the inner peripheral surface. *
内蓋部３１２は、発電機収容本体部３１１の軸方向一方側に取り付けられる。内蓋部３１２は、円環板部３１２ａと、外筒部３１２ｂと、内筒部３１２ｃと、ベアリング保持部３１２ｅと、を有する。円環板部３１２ａは、径方向に拡がる円環板状である。内蓋部３１２は、円環板部３１２ａにより第１のステータ３３０の軸方向一方側を覆う。円環板部３１２ａは、下側の端部に、円環板部３１２ａを軸方向に貫通する開口部３１２ｆを有する。開口部３１２ｆは、ハウジング１０の内部に繋がる。　 The inner lid 312 is attached to one side in the axial direction of the generator housing main body 311. The inner lid portion 312 includes an annular plate portion 312a, an outer cylinder portion 312b, an inner cylinder portion 312c, and a bearing holding portion 312e. The annular plate portion 312a has an annular plate shape that expands in the radial direction. The inner lid portion 312 covers one side in the axial direction of the first stator 330 by the annular plate portion 312a. The annular plate portion 312a has an opening 312f that penetrates the annular plate portion 312a in the axial direction at the lower end. The opening 312 f is connected to the inside of the housing 10. *
外筒部３１２ｂは、円環板部３１２ａの径方向外縁部から軸方向他方側に延びる円筒状である。外筒部３１２ｂの軸方向他方側の端部は、本体筒部３１１ｂの軸方向一方側の端部と接触して固定される。内筒部３１２ｃは、円環板部３１２ａの径方向内縁部から軸方向他方側に延びる円筒状である。　 The outer cylinder portion 312b has a cylindrical shape extending from the radially outer edge portion of the annular plate portion 312a to the other side in the axial direction. The end portion on the other side in the axial direction of the outer tube portion 312b is fixed in contact with the end portion on the one side in the axial direction of the main body tube portion 311b. The inner cylinder portion 312c has a cylindrical shape extending from the radially inner edge of the annular plate portion 312a to the other side in the axial direction. *
ベアリング保持部３１２ｅは、内筒部３１２ｃの軸方向他方側の端部から径方向内側に拡がる円環状部４０１と、円環状部の径方向内縁部から軸方向他端側に突出する円筒部４０２とを有する。　内蓋部３１２は、内蓋部３１２の軸方向一方側の面から軸方向他方側に窪む第２凹部３１２ｇを有する。第２凹部３１２ｇの内面は、内筒部３１２ｃの内周面と円環状部４０１の軸方向一方側の面とを含む。内蓋部３１２の軸方向一方側の面は、本実施形態では円環状部４０１の軸方向一方側の面である。第２凹部３１２ｇの内側面は、内筒部３１２ｃの径方向内側面と円環状部４０１の軸方向一方側の面とを含む。　 The bearing holding portion 312e includes an annular portion 401 that extends radially inward from the other axial end of the inner cylindrical portion 312c, and a cylindrical portion 402 that protrudes from the radially inner edge of the annular portion toward the other axial end. And have. The inner lid portion 312 has a second concave portion 312g that is recessed from the surface on one side in the axial direction of the inner lid portion 312 to the other side in the axial direction. The inner surface of the second recess 312g includes the inner peripheral surface of the inner cylinder portion 312c and the surface on the one axial side of the annular portion 401. The surface on the one side in the axial direction of the inner lid portion 312 is the surface on the one side in the axial direction of the annular portion 401 in the present embodiment. The inner side surface of the second recess 312g includes a radially inner side surface of the inner cylindrical portion 312c and a surface on one axial side of the annular portion 401. *
ベアリング保持部３１２ｅの円筒部４０２は、円環状部４０１の径方向内側の端縁から軸方向他方側に突出する円筒状である。ベアリング保持部３１２ｅは、円筒部４０２の内周面にベアリング３７０を保持する。　 The cylindrical portion 402 of the bearing holding portion 312e has a cylindrical shape that protrudes from the radially inner end edge of the annular portion 401 to the other side in the axial direction. The bearing holding portion 312 e holds the bearing 370 on the inner peripheral surface of the cylindrical portion 402. *
ハウジング１０は、発電機収容本体部３１１と内蓋部３１２とからなる発電機収容部３１４を有する。発電機収容部３１４の内部には、発電機室１９Ｂ（図１参照）が構成される。発電機収容部３１４は、第１のロータ３２０および第１のステータ３３０を収容する。第１のステータ３３０は、発電機収容本体部３１１の内面に固定される。第１のロータ３２０は、第１のステータ３３０の径方向内側に配置される。　 The housing 10 has a generator housing portion 314 including a generator housing body 311 and an inner lid portion 312. Inside the generator housing 314, a generator room 19B (see FIG. 1) is configured. The generator housing part 314 houses the first rotor 320 and the first stator 330. The first stator 330 is fixed to the inner surface of the generator housing main body 311. The first rotor 320 is disposed on the radially inner side of the first stator 330. *
第１のステータ３３０は、第１のロータ３２０と径方向に隙間を介して対向する。第１のステータ３３０は、ステータコア３３１と、ステータコア３３１に装着される複数のコイル３３２と、を有する。ステータコア３３１は、第１の回転軸Ｊ１を中心とした円環状である。ステータコア３３１の外周面は、本体筒部３１１ｂの内周面に固定される。ステータコア３３１は、後述するロータコア３２２の径方向外側に隙間を介して対向する。コイル３３２は、ステータコア３３１の軸方向一方側および軸方向他方側に突出する。　 The first stator 330 faces the first rotor 320 via a gap in the radial direction. The first stator 330 has a stator core 331 and a plurality of coils 332 attached to the stator core 331. The stator core 331 has an annular shape around the first rotation axis J1. The outer peripheral surface of the stator core 331 is fixed to the inner peripheral surface of the main body cylinder portion 311b. The stator core 331 is opposed to a radially outer side of a rotor core 322, which will be described later, via a gap. The coil 332 protrudes on the one axial side and the other axial side of the stator core 331. *
図２を基に説明したように、発電機収容部３１４に貯留されるオイルＯの液面ＯＳは、開口部３１２ｆよりも上側に位置する。これにより、開口部３１２ｆには、発電機収容部３１４に貯留されるオイルＯが常時流通する。オイルＯの液面ＯＳは、第１のポンプ部３４０によってオイルＯが吸い上げられることで変動するが、少なくとも第１のロータ３２０の回転時において、第１のロータ３２０よりも下側に配置される。これにより、第１のロータ３２０が回転する際に、オイルＯが第１のロータ３２０の回転抵抗となることを抑制できる。　 As described based on FIG. 2, the liquid level OS of the oil O stored in the generator housing unit 314 is located above the opening 312 f. Thereby, the oil O stored in the generator accommodating part 314 always flows through the opening 312f. The liquid level OS of the oil O varies as the oil O is sucked up by the first pump unit 340, but is disposed below the first rotor 320 at least when the first rotor 320 rotates. . Thereby, when the 1st rotor 320 rotates, it can suppress that oil O becomes rotational resistance of the 1st rotor 320. FIG. *
外蓋部３１３は、内蓋部３１２の軸方向一方側に取り付けられる。外蓋部３１３は、外蓋本体部３１３ａと、栓体部３１３ｂと、を有する。外蓋本体部３１３ａは、径方向に拡がる。外蓋本体部３１３ａは、蓋板部３１３ｃと、突出部３１３ｄと、を有する。蓋板部３１３ｃは、径方向に拡がる円板状である。蓋板部３１３ｃの径方向外縁部は、円環板部３１２ａの径方向外縁部に固定される。蓋板部３１３ｃの軸方向他方側の面は、円環板部３１２ａの軸方向一方側の面と接触する。突出部３１３ｄは、蓋板部３１３ｃの中央部から軸方向他方側に突出する。突出部３１３ｄは、内筒部３１２ｃに軸方向一方側から挿入される。突出部３１３ｄは、ベアリング保持部３１２ｅの円環状部４０１の軸方向一方側に間隔を空けて配置される。　 The outer lid portion 313 is attached to one side of the inner lid portion 312 in the axial direction. The outer lid part 313 includes an outer lid body part 313a and a plug part 313b. The outer lid main body 313a expands in the radial direction. The outer lid main body portion 313a includes a lid plate portion 313c and a protruding portion 313d. The lid plate portion 313c has a disk shape that expands in the radial direction. The radially outer edge portion of the lid plate portion 313c is fixed to the radially outer edge portion of the annular plate portion 312a. The surface on the other side in the axial direction of the cover plate portion 313c is in contact with the surface on the one side in the axial direction of the annular plate portion 312a. The protruding portion 313d protrudes from the center portion of the lid plate portion 313c to the other side in the axial direction. The protruding portion 313d is inserted into the inner cylinder portion 312c from one side in the axial direction. The protruding portion 313d is disposed at an interval on one side in the axial direction of the annular portion 401 of the bearing holding portion 312e. *
外蓋本体部３１３ａは、第１凹部３１３ｅと、第２貫通孔３１３ｆと、を有する。第１凹部３１３ｅは、外蓋本体部３１３ａの軸方向一方側の面から軸方向他方側に窪む。第１凹部３１３ｅは、外蓋本体部３１３ａの中央部に設けられ、蓋板部３１３ｃと突出部３１３ｄとに跨って設けられる。第２貫通孔３１３ｆは、第１凹部３１３ｅの底面から突出部３１３ｄの軸方向他方側の面まで貫通する。すなわち、第２貫通孔３１３ｆは、第１凹部３１３ｅの底面からハウジング１０の内部まで貫通する。第２貫通孔３１３ｆは、第２凹部３１２ｇの内部に開口する。これにより、第２貫通孔３１３ｆは、第１凹部３１３ｅの内部と第２凹部１２ｇの内部とを繋ぐ。第２貫通孔３１３ｆには、第１の回転軸Ｊ１が通る。　 The outer lid main body 313a includes a first recess 313e and a second through hole 313f. The first recess 313e is recessed from the surface on the one axial side of the outer lid main body 313a to the other axial side. The first recess 313e is provided at the center of the outer lid main body 313a, and is provided across the lid plate 313c and the protrusion 313d. The second through hole 313f penetrates from the bottom surface of the first recess 313e to the surface on the other axial side of the protruding portion 313d. That is, the second through hole 313 f penetrates from the bottom surface of the first recess 313 e to the inside of the housing 10. The second through hole 313f opens inside the second recess 312g. Thereby, the 2nd penetration hole 313f connects the inside of the 1st crevice 313e and the inside of the 2nd crevice 12g. The first rotation axis J1 passes through the second through hole 313f. *
栓体部３１３ｂは、第１凹部３１３ｅに嵌め込まれて外蓋本体部３１３ａに固定される。栓体部３１３ｂは、第１凹部３１３ｅの軸方向一方側の開口を閉塞する。栓体部３１３ｂは、第１のシャフト３２０ａの軸方向一方側を覆う。すなわち、外蓋部３１３は、第１のシャフト３２０ａの軸方向一方側を覆う。栓体部３１３ｂは、軸方向一方側の端部に径方向外側に突出する鍔部３１３ｇを有する。鍔部３１３ｇは、蓋板部３１３ｃの軸方向一方側の面に接触する。栓体部３１３ｂは、鍔部３１３ｇにより軸方向に位置決めされる。　 The plug portion 313b is fitted into the first recess 313e and fixed to the outer lid main body portion 313a. The plug body portion 313b closes the opening on the one axial side of the first recess 313e. The plug body portion 313b covers one side in the axial direction of the first shaft 320a. That is, the outer lid portion 313 covers one side in the axial direction of the first shaft 320a. The plug portion 313b has a flange portion 313g that protrudes radially outward at an end portion on one axial side. The flange portion 313g contacts the surface on one side in the axial direction of the lid plate portion 313c. The plug body portion 313b is positioned in the axial direction by the flange portion 313g. *
外蓋部３１３において、外蓋本体部３１３ａと栓体部３１３ｂとの間には、内歯歯車３４３および外歯歯車３４２が収容される。本実施形態において、外蓋部３１３のうちの外歯歯車３４２および内歯歯車３４３を収容する部位が第１のポンプ部３４０を構成する。本実施形態では、第１のポンプ部３４０はトロコイドポンプである。本実施形態において、第１のポンプ部３４０は、後段において説明する第２のポンプ部４０と略同様の構成を有する。外歯歯車３４２の貫通孔には、第１のポンプ部３４０と第１のシャフト３２０ａ内の油路とを接続する筒状の取付部材３５０が挿入される。　 In the outer lid portion 313, an internal gear 343 and an external gear 342 are accommodated between the outer lid main body portion 313a and the plug body portion 313b. In the present embodiment, a portion that accommodates the external gear 342 and the internal gear 343 in the outer lid portion 313 constitutes the first pump portion 340. In the present embodiment, the first pump unit 340 is a trochoid pump. In this embodiment, the 1st pump part 340 has the structure substantially the same as the 2nd pump part 40 demonstrated in a back | latter stage. A cylindrical mounting member 350 that connects the first pump portion 340 and the oil passage in the first shaft 320a is inserted into the through hole of the external gear 342. *
栓体部３１３ｂは、吸入側油路３４０ａと、吐出側油路３４０ｂとを有する。吸入側油路３４０ａは、外蓋部３１３に設けられる第１の吸い上げ油路９２（図１参照）を介して開口部３１２ｆと第１のポンプ部３４０の吸入口とを繋ぐ。吐出側油路３４０ｂは、第１のポンプ部３４０の吐出口３４５と取付部材３５０の貫通孔とを繋ぐ。　 The plug body portion 313b has a suction side oil passage 340a and a discharge side oil passage 340b. The suction side oil passage 340 a connects the opening 312 f and the suction port of the first pump portion 340 via a first suction oil passage 92 (see FIG. 1) provided in the outer lid portion 313. The discharge-side oil passage 340 b connects the discharge port 345 of the first pump unit 340 and the through hole of the attachment member 350. *
第１のロータ３２０は、第１のシャフト３２０ａと、ロータコア３２２と、第１エンドプレート３２４と、第２エンドプレート３２５と、を有する。第１のシャフト３２０ａは、シャフト本体部３２１ａと、ロータコア保持部３２１ｂと、接続部３２１ｃと、取付部材３５０と、を有する。シャフト本体部３２１ａと、ロータコア保持部３２１ｂと、接続部３２１ｃは、単一の部材である。　 The first rotor 320 includes a first shaft 320a, a rotor core 322, a first end plate 324, and a second end plate 325. The first shaft 320a includes a shaft main body 321a, a rotor core holding part 321b, a connection part 321c, and an attachment member 350. The shaft main body portion 321a, the rotor core holding portion 321b, and the connection portion 321c are a single member. *
シャフト本体部３２１ａは、第１の回転軸Ｊ１を中心とし、軸方向に延びる円柱状である。ロータコア保持部３２１ｂは、第１の回転軸Ｊ１を中心とし、シャフト本体部３２１ａの径方向外側を囲む円筒状である。ロータコア保持部３２１ｂの軸方向長さは、シャフト本体部３２１ａの軸方向長さよりも短い。接続部３２１ｃは、シャフト本体部３２１ａとロータコア保持部３２１ｂとが径方向に見て重なる領域において、シャフト本体部３２１ａの軸方向の中央部から径方向外側へ円環状に拡がり、シャフト本体部３２１ａとロータコア保持部３２１ｂとを径方向に連結する。接続部３２１ｃの軸方向長さは、シャフト本体部３２１ａの軸方向長さおよびロータコア保持部３２１ｂの軸方向長さよりも短い。したがって、接続部３２１ｃの軸方向一方側において、シャフト本体部３２１ａの外周面５０１ａとロータコア保持部３２１ｂの内周面５０１ｂとが、径方向に対向する。また接続部３２１ｃの軸方向他方側において、シャフト本体部３２１ａの外周面５０２ａとロータコア保持部３２１ｂの内周面５０２ｂとが、径方向に対向する。　 The shaft main body 321a has a cylindrical shape that extends in the axial direction with the first rotation axis J1 as the center. The rotor core holding part 321b has a cylindrical shape centering on the first rotation axis J1 and surrounding the radially outer side of the shaft main body part 321a. The axial length of the rotor core holding portion 321b is shorter than the axial length of the shaft main body portion 321a. In the region where the shaft main body 321a and the rotor core holding portion 321b overlap in the radial direction, the connecting portion 321c extends in an annular shape from the axial center to the radial outer side of the shaft main body 321a. The rotor core holding part 321b is connected in the radial direction. The axial length of the connecting portion 321c is shorter than the axial length of the shaft main body portion 321a and the axial length of the rotor core holding portion 321b. Therefore, the outer peripheral surface 501a of the shaft main body 321a and the inner peripheral surface 501b of the rotor core holding portion 321b face each other in the radial direction on one axial side of the connecting portion 321c. Further, on the other axial side of the connecting portion 321c, the outer peripheral surface 502a of the shaft main body portion 321a and the inner peripheral surface 502b of the rotor core holding portion 321b face each other in the radial direction. *
第１のシャフト３２０ａは、軸方向一方側に向けて開口する第１シャフト凹部３２１Ａと、軸方向他方側に向けて開口する第２シャフト凹部３２１Ｂとを有する。第１シャフト凹部３２１Ａは、軸方向一方側へ開口し周方向に延びる円環状の溝部である。第１シャフト凹部３２１Ａは、シャフト本体部３２１ａの外周面５０１ａ、およびロータコア保持部３２１ｂの内周面５０１ｂを側面とし、接続部３２１ｃの軸方向一方側の面５０１ｃを底面とする。　 The first shaft 320a includes a first shaft recess 321A that opens toward one side in the axial direction and a second shaft recess 321B that opens toward the other side in the axial direction. The first shaft recess 321A is an annular groove that opens to one side in the axial direction and extends in the circumferential direction. The first shaft recess 321A has the outer peripheral surface 501a of the shaft main body portion 321a and the inner peripheral surface 501b of the rotor core holding portion 321b as side surfaces, and the surface 501c on one axial side of the connection portion 321c as a bottom surface. *
第１シャフト凹部３２１Ａにおいて、ロータコア保持部３２１ｂの内周面５０１ｂは、ロータコア保持部３２１ｂの軸方向一方側の開口端に向かうに従って径方向外側へ傾斜する。また、ロータコア保持部３２１ｂの内周面５０１ｂは、軸方向の開口側の端部に曲面形状の斜面部５０１ｄを有する。斜面部５０１ｄは、軸方向一方側へ向かうに従って径方向外側へ傾斜する曲面である。　 In the first shaft recess 321A, the inner peripheral surface 501b of the rotor core holding portion 321b is inclined outward in the radial direction toward the opening end on one axial side of the rotor core holding portion 321b. The inner peripheral surface 501b of the rotor core holding portion 321b has a curved slope portion 501d at the end on the opening side in the axial direction. The inclined surface portion 501d is a curved surface that is inclined outward in the radial direction toward the one side in the axial direction. *
第２シャフト凹部３２１Ｂは、軸方向他方側に開口し周方向に延びる円環状の溝部である。第２シャフト凹部３２１Ｂは、シャフト本体部３２１ａの外周面５０２ａ、およびロータコア保持部３２１ｂの内周面５０２ｂを側面とし、接続部３２１ｃの軸方向一方側の面５０２ｃを底面とする。第２シャフト凹部３２１Ｂにおいて、ロータコア保持部３２１ｂの内周面５０２ｂは、ロータコア保持部３２１ｂの軸方向他方側の開口端に向かうに従って径方向外側へ傾斜する。　 The second shaft recess 321B is an annular groove that opens to the other side in the axial direction and extends in the circumferential direction. The second shaft recess 321B has the outer peripheral surface 502a of the shaft main body portion 321a and the inner peripheral surface 502b of the rotor core holding portion 321b as side surfaces, and the surface 502c on one axial side of the connection portion 321c as a bottom surface. In the second shaft recess 321B, the inner peripheral surface 502b of the rotor core holding portion 321b is inclined radially outward toward the opening end on the other axial side of the rotor core holding portion 321b. *
シャフト本体部３２１ａは、接続部３２１ｃの軸方向一方側に位置するベアリング３７０と、接続部３２１ｃの軸方向他方側に位置するベアリング３７１とにより回転可能に支持される。ベアリング３７０，３７１は例えばボールベアリングである。　本実施形態では、ベアリング３７０を保持するベアリング保持部３１２ｅの一部が、径方向に見て、ロータコア保持部３２１ｂと重なる。この構成によれば、発電機３の軸方向長さを短くでき、薄型化可能である。　 The shaft body 321a is rotatably supported by a bearing 370 located on one side in the axial direction of the connecting part 321c and a bearing 371 located on the other side in the axial direction of the connecting part 321c. The bearings 370 and 371 are ball bearings, for example. In this embodiment, a part of the bearing holding portion 312e that holds the bearing 370 overlaps the rotor core holding portion 321b when viewed in the radial direction. According to this structure, the axial direction length of the generator 3 can be shortened, and it can be reduced in thickness. *
本実施形態では、ベアリング保持部３１２ｅの円筒部４０２は、ロータコア保持部３２１ｂの軸方向一方側の開口部の近傍において、軸方向一方側へ向かうに従って径が大きくなる形状を有する。すなわち、ベアリング保持部３１２ｅの外周面は、ロータコア保持部３２１ｂの内側から軸方向の外側へ向かって径方向外側に傾斜する傾斜面であ
る。ベアリング保持部３１２ｅの外周面は、隙間を介して対向するロータコア保持部３２１ｂの斜面部５０１ｄに倣う曲面形状を有する。　ベアリング保持部３１２ｅの円環状部４０１は、フランジ部５０３と軸方向に対向する。すなわち、ベアリング保持部３１２ｅは、ロータコア保持部３２１ｂの軸方向を向いた面と対向する。シャフト本体部３２１ａは、軸方向他方側の端部に出力部３２１ｅを有する。


In the present embodiment, the cylindrical portion 402 of the bearing holding portion 312e has a shape whose diameter increases toward the one side in the axial direction in the vicinity of the opening on the one side in the axial direction of the rotor core holding portion 321b. That is, the outer peripheral surface of the bearing holding portion 312e is an inclined surface that is inclined radially outward from the inner side of the rotor core holding portion 321b toward the outer side in the axial direction. The outer peripheral surface of the bearing holding portion 312e has a curved surface shape that follows the inclined surface portion 501d of the rotor core holding portion 321b facing each other through a gap. The annular portion 401 of the bearing holding portion 312e faces the flange portion 503 in the axial direction. That is, the bearing holding portion 312e faces the surface of the rotor core holding portion 321b facing the axial direction. The shaft main body portion 321a has an output portion 321e at the end on the other side in the axial direction.


ベアリング３７０の軸方向一方側に、回転検出部３８０が配置される。回転検出部３８０は、第１のロータ３２０の回転を検出する。本実施形態において回転検出部３８０は、例えば、ＶＲ（Ｖａｒｉａｂｌｅ　Ｒｅｌｕｃｔａｎｃｅ）型レゾルバである。回転検出部３８０は、内筒部３１２ｃの径方向内側に配置される。回転検出部３８０のレゾルバロータはシャフト本体部３２１ａの軸方向一方側の端部に固定され、レゾルバステータは、内筒部３１２ｃの内周に固定される。回転検出部３８０は、ホール素子やＭＲ（Ｍａｇｎｅｔｏ　Ｒｅｓｉｓｔｉｖｅ）素子と、マグネットとを組み合わせた構成であってもよい。　 A rotation detector 380 is arranged on one side of the bearing 370 in the axial direction. The rotation detector 380 detects the rotation of the first rotor 320. In the present embodiment, the rotation detection unit 380 is, for example, a VR (Variable Reluctance) type resolver. The rotation detection unit 380 is disposed on the radially inner side of the inner cylinder portion 312c. The resolver rotor of the rotation detector 380 is fixed to one end of the shaft main body 321a in the axial direction, and the resolver stator is fixed to the inner periphery of the inner cylinder portion 312c. The rotation detection unit 380 may have a configuration in which a Hall element, an MR (Magneto Resistive) element, and a magnet are combined. *
シャフト本体部３２１ａは、シャフト本体部３２１ａの軸方向一方側の端部に開口し、軸方向他方側へ延びる有底穴からなる第１のシャフト内油路９３Ａを有する。第１のシャフト内油路９３Ａの軸方向他方側の端部は閉塞される。本実施形態において軸方向と直交する断面において第１のシャフト内油路９３Ａの内縁は、第１の回転軸Ｊ１を中心とする円形状である。　 The shaft main body portion 321a has a first in-shaft oil passage 93A that has a bottomed hole that opens to an end portion on one axial side of the shaft main body portion 321a and extends to the other axial side. The end portion on the other side in the axial direction of the first in-shaft oil passage 93A is closed. In the present embodiment, the inner edge of the first shaft oil passage 93A has a circular shape centered on the first rotation axis J1 in the cross section orthogonal to the axial direction. *
ロータコア保持部３２１ｂは、第１のシャフト３２０ａにおいてロータコア３２２が取り付けられる部分である。ロータコア３２２は、シャフト本体部３２１ａに固定される円環状である。ロータコア３２２は、円筒状のロータコア保持部３２１ｂの外周面に嵌め合わされる。ロータコア３２２は、図示しない複数のロータマグネットを有する。複数のロータマグネットは、ロータコア３２２の周方向に沿って配置される。　 The rotor core holding part 321b is a part to which the rotor core 322 is attached on the first shaft 320a. The rotor core 322 has an annular shape fixed to the shaft main body 321a. The rotor core 322 is fitted to the outer peripheral surface of the cylindrical rotor core holding part 321b. The rotor core 322 has a plurality of rotor magnets (not shown). The plurality of rotor magnets are arranged along the circumferential direction of the rotor core 322. *
ロータコア保持部３２１ｂは、軸方向一方側の端部から径方向外側へ拡がるフランジ部５０３を有する。フランジ部５０３は、軸方向に貫通する雌ねじ部５０３ａを有する。第１エンドプレート３２４は、フランジ部５０３とロータコア３２２との間に軸方向に挟まれて配置される。第２エンドプレート３２５は、ロータコア３２２の軸方向他方側の面と接して配置される。第１エンドプレート３２４および第２エンドプレート３２５は、径方向に拡がる円環板状である。ただし、第１エンドプレート３２４がなくてもよい。　 The rotor core holding part 321b has a flange part 503 that extends radially outward from an end on one axial side. The flange portion 503 has a female screw portion 503a penetrating in the axial direction. The first end plate 324 is disposed so as to be sandwiched between the flange portion 503 and the rotor core 322 in the axial direction. The second end plate 325 is disposed in contact with the surface on the other axial side of the rotor core 322. The first end plate 324 and the second end plate 325 have an annular plate shape that expands in the radial direction. However, the first end plate 324 may not be provided. *
ロータコア３２２および第２エンドプレート３２５は、ロータコア３２２および第２エンドプレート３２５を軸方向に貫通する貫通孔を有する。ロータコア３２２は、ボルト５０４によりロータコア保持部３２１ｂに固定される。ボルト５０４は、ロータコア３２２および第２エンドプレート３２５の貫通孔に挿入される。ボルト５０４の雄ねじ部は、フランジ部５０３の雌ねじ部に締結される。　 The rotor core 322 and the second end plate 325 have through holes that penetrate the rotor core 322 and the second end plate 325 in the axial direction. The rotor core 322 is fixed to the rotor core holding part 321b by bolts 504. The bolt 504 is inserted into the through hole of the rotor core 322 and the second end plate 325. The male screw portion of the bolt 504 is fastened to the female screw portion of the flange portion 503. *
本実施形態では、ロータコア保持部３２１ｂがフランジ部５０３を有することにより、ロータコア３２２を軸方向に位置決めして固定できる。フランジ部５０３に雌ねじ部が設けられていることにより、ナットを用いることなくボルト５０４を締結できる。フランジ部５０３の軸方向一方側の面には、ボルト５０４の先端がわずかに突出するだけであるため、フランジ部５０３の表面を伝わるオイルＯの流れを阻害しにくい。　 In this embodiment, the rotor core holding part 321b has the flange part 503, whereby the rotor core 322 can be positioned and fixed in the axial direction. By providing the internal thread portion on the flange portion 503, the bolt 504 can be fastened without using a nut. Since the tip of the bolt 504 protrudes slightly on the surface on one side in the axial direction of the flange portion 503, it is difficult to inhibit the flow of the oil O that travels on the surface of the flange portion 503. *
取付部材３５０は、キャップ状の連結部材３５１により、シャフト本体部３２１ａの軸方向一方側に固定される。連結部材３５１は、連結部材３５１を軸方向に貫通する貫通孔を有し、取付部材３５０は、連結部材３５１の貫通孔に挿入される。取付部材３５０の貫通孔は、シャフト本体部３２１ａの第１のシャフト内油路９３Ａの一部を構成し、第１のポンプ部３４０の吐出側油路３４０ｂに繋がる。取付部材３５０は、シャフト本体部３２１ａよりも軸方向一方側に延びて、第２貫通孔３１３ｆに回転可能に支持される。　 The attachment member 350 is fixed to one side in the axial direction of the shaft main body 321a by a cap-shaped connecting member 351. The connecting member 351 has a through hole that penetrates the connecting member 351 in the axial direction, and the attachment member 350 is inserted into the through hole of the connecting member 351. The through-hole of the attachment member 350 constitutes a part of the first in-shaft oil passage 93A of the shaft main body portion 321a and is connected to the discharge-side oil passage 340b of the first pump portion 340. The attachment member 350 extends to one side in the axial direction from the shaft body 321a and is rotatably supported by the second through hole 313f. *
第１のシャフト内油路９３Ａは、シャフト本体部３２１ａの軸方向の中央部において、複数の第１の径方向油路９３Ｂに分岐される。複数の第１の径方向油路９３Ｂは、第１のシャフト内油路９３Ａから径方向に放射状に延びる。第１の径方向油路９３Ｂの本数は、例えば２本～１６本である。第１の径方向油路９３Ｂは、第１のシャフト内油路９３Ａから径方向外側へオイルを案内可能であれば、径方向に対して傾斜または湾曲した形状であってもよい。　 The first in-shaft oil passage 93A is branched into a plurality of first radial oil passages 93B at the axial central portion of the shaft main body portion 321a. The plurality of first radial oil passages 93B extend radially from the first shaft oil passage 93A in the radial direction. The number of first radial oil passages 93B is, for example, 2 to 16. The first radial oil passage 93B may have a shape that is inclined or curved with respect to the radial direction as long as oil can be guided radially outward from the first shaft oil passage 93A. *
第１の径方向油路９３Ｂは、第１のシャフト内油路９３Ａから径方向に延びて接続部３２１ｃおよびロータコア保持部３２１ｂを貫通し、ロータコア保持部３２１ｂの外周面に開口する。したがって、第１の径方向油路９３Ｂの径方向外側の端部には、ロータコア３２２の内周面の一部が露出する。これにより、ロータコア３２２についても、オイルＯによって冷却できる。　 The first radial oil passage 93B extends in the radial direction from the first shaft oil passage 93A, passes through the connection portion 321c and the rotor core holding portion 321b, and opens to the outer peripheral surface of the rotor core holding portion 321b. Therefore, a part of the inner peripheral surface of the rotor core 322 is exposed at the radially outer end of the first radial oil passage 93B. Thereby, the rotor core 322 can also be cooled by the oil O. *
第１の径方向油路９３Ｂは、接続部３２１ｃの内部において、２本の第３分岐油路３６３Ａ、３６３Ｂに分岐される。第３分岐油路３６３Ａは、第１の径方向油路９３Ｂとの分岐点から軸方向一方側へ延び、接続部３２１ｃの軸方向一方側の面５０１ｃに開口する。第３分岐油路３６３Ｂは、第１の径方向油路９３Ｂとの分岐点から軸方向他方側へ延び、接続部３２１ｃの軸方向他方側の面５０２ｃに開口する。第３分岐油路３６３Ａ、３６３Ｂは、第１の径方向油路９３Ｂから軸方向へオイルを案内可能であれば、軸方向に対して傾斜または湾曲した形状であってもよい。　 The first radial oil passage 93B is branched into two third branch oil passages 363A and 363B inside the connection portion 321c. The third branch oil passage 363A extends from the branch point with the first radial oil passage 93B to one side in the axial direction, and opens to a surface 501c on the one side in the axial direction of the connecting portion 321c. The third branch oil passage 363B extends from the branch point with the first radial oil passage 93B to the other side in the axial direction, and opens on the surface 502c on the other side in the axial direction of the connecting portion 321c. The third branch oil passages 363A and 363B may have a shape inclined or curved with respect to the axial direction as long as the oil can be guided in the axial direction from the first radial oil passage 93B. *
本実施形態では、第３分岐油路３６３Ａ、３６３Ｂは、接続部３２１ｃの径方向の中央部に開口する。第１シャフト凹部３２１Ａおよび第２シャフト凹部３２１Ｂの底面の角部は丸みを帯びた形状となりやすく、角部の近傍ではドリルが滑りやすいため穴開け加工が難しくなる。本実施形態では、接続部３２１ｃの径方向の中央部は、比較的平坦な面となりやすいため、穴開け加工が行いやすい。また、加工が容易であることから、第３分岐油路３６３Ａ、３６３Ｂの精度も向上させやすい。　 In the present embodiment, the third branch oil passages 363A and 363B open at the radial center of the connection portion 321c. The corners of the bottom surfaces of the first shaft recess 321A and the second shaft recess 321B tend to be rounded, and the drill is easy to slip near the corners, making drilling difficult. In the present embodiment, the central portion in the radial direction of the connecting portion 321c is likely to be a relatively flat surface, so that drilling is easy to perform. Further, since the processing is easy, it is easy to improve the accuracy of the third branch oil passages 363A, 363B. *
シャフト本体部３２１ａは、第１のシャフト内油路９３Ａからベアリング３７０、３７１へ延びるベアリング潤滑用油路３６４Ａ、３６４Ｂをさらに有する。ベアリング潤滑用油路３６４Ａは、第１のシャフト内油路９３Ａの軸方向中央部から分岐され、径方向一方側へ向かうに従って径方向外側へ斜めに延びる。ベアリング潤滑用油路６４Ａは、シャフト本体部３２１ａの外周面において、ベアリング３７０の軸方向他方側の面に臨む位置に開口する。ベアリング潤滑用油路３６４Ａと第１のシャフト内油路９３Ａとの接続位置は、第１の径方向油路９３Ｂと第１のシャフト内油路９３Ａとの接続位置よりも軸方向一方側である。ベアリング潤滑用油路３６４Ａの本数は、例えば１本～８本である。　 The shaft main body portion 321a further includes bearing lubrication oil passages 364A and 364B extending from the first in-shaft oil passage 93A to the bearings 370 and 371. The bearing lubrication oil passage 364A is branched from the axial center of the first shaft oil passage 93A and extends obliquely outward in the radial direction toward the one radial side. The bearing lubrication oil passage 64A opens at a position facing the other surface in the axial direction of the bearing 370 on the outer peripheral surface of the shaft main body 321a. The connection position between the bearing lubrication oil path 364A and the first in-shaft oil path 93A is on one axial side than the connection position between the first radial oil path 93B and the first in-shaft oil path 93A. . The number of bearing lubrication oil passages 364A is, for example, 1 to 8. *
ベアリング潤滑用油路３６４Ｂは、第１のシャフト内油路９３Ａの軸方向他方側の端部から分岐され、径方向外側へ延びる。ベアリング潤滑用油路３６４Ｂと第１のシャフト内油路９３Ａとの接続位置は、ベアリング３７１よりも軸方向他方側である。ベアリング潤滑用油路３６４Ｂは、第１のシャフト内油路９３Ａから径方向外側へ延びる。ベアリング潤滑用油路３６４Ｂは、シャフト本体部３２１ａの外周面において、ベアリング３７１の軸方向他方側の面に臨む位置に開口する。ベアリング潤滑用油路３６４Ｂの本数は、例えば１本～８本である。　 The bearing lubrication oil passage 364B is branched from the end portion on the other axial side of the first shaft oil passage 93A and extends outward in the radial direction. The connection position between the bearing lubrication oil passage 364B and the first in-shaft oil passage 93A is on the other side in the axial direction from the bearing 371. The bearing lubrication oil passage 364B extends radially outward from the first shaft oil passage 93A. The bearing lubrication oil passage 364B opens at a position facing the other surface in the axial direction of the bearing 371 on the outer peripheral surface of the shaft main body 321a. The number of bearing lubrication oil passages 364B is, for example, 1 to 8. *
本実施形態の発電機３において、第１のポンプ部３４０は、第１のシャフト３２０ａを介して駆動される。発電機３において、第１のロータ３２０が回転して第１のシャフト３２０ａが回転すると、第１のシャフト３２０ａに固定された外歯歯車３４２が回転する。これにより、外歯歯車３４２と噛み合う内歯歯車３４３が回転し、吸入側油路３４０ａを介して発電機収容部３１４の下部からオイルＯが汲み上げられる。外歯歯車４２と内歯歯車３４３の間に吸入されたオイルＯは吐出側油路３４０ｂへ吐出される。吐出側油路３４０ｂへ吐出されたオイルＯは、第１のシャフト内油路９３Ａに流入する。　 In the generator 3 of this embodiment, the 1st pump part 340 is driven via the 1st shaft 320a. In the generator 3, when the first rotor 320 rotates and the first shaft 320a rotates, the external gear 342 fixed to the first shaft 320a rotates. As a result, the internal gear 343 that meshes with the external gear 342 rotates, and the oil O is pumped from the lower portion of the generator housing portion 314 via the suction-side oil passage 340a. The oil O sucked between the external gear 42 and the internal gear 343 is discharged to the discharge side oil passage 340b. The oil O discharged to the discharge side oil passage 340b flows into the first shaft oil passage 93A. *
第１のシャフト内油路９３Ａに流入したオイルＯは、軸方向の中央部において分岐する複数の第１の径方向油路９３Ｂへ流入する。さらに、第１の径方向油路９３Ｂへ流入したオイルＯは、第１の径方向油路９３Ｂの径方向の中央部において分岐する２本の第３分岐油路３６３Ａ、３６３Ｂへ流入する。第３分岐油路３６３Ａに流入したオイルＯは、接続部３２１ｃの軸方向一方側を向く面５０１ｃに位置する開口から第１シャフト凹部３２１Ａ内へ流入する。　 The oil O that has flowed into the first in-shaft oil passage 93A flows into a plurality of first radial oil passages 93B that branch off in the central portion in the axial direction. Further, the oil O that has flowed into the first radial oil passage 93B flows into two third branch oil passages 363A and 363B that branch at the radial center of the first radial oil passage 93B. The oil O that has flowed into the third branch oil passage 363A flows into the first shaft recess 321A from the opening located on the surface 501c facing the one side in the axial direction of the connecting portion 321c. *
第１シャフト凹部３２１Ａ内に流入したオイルＯは、遠心力により径方向外側へ移動し、ロータコア保持部３２１ｂの内周面５０１ｂに達する。内周面５０１ｂ上のオイルＯは、内周面５０１ｂの傾斜に沿って軸方向一方側へ移動する。内周面５０１ｂの軸方向一方側の端部に達したオイルＯは、斜面部５０１ｄに沿って移動方向を径方向外側へ向けられ、第１シャフト凹部３２１Ａの外側へ流出する。本実施形態では、内周面５０１ｂが傾斜面であることにより、オイルＯが内周面５０１ｂ上に滞留することなく円滑にコイル３３２側へ移動する。また、内周面５０１ｂの端部に斜面部５０１ｄを有することにより、オイルＯの移動方向を軸方向から径方向に円滑に転回させることができ、オイルＯの主な飛散方向をコイル３３２へ向けることができる。　 The oil O that has flowed into the first shaft recess 321A moves radially outward due to centrifugal force and reaches the inner peripheral surface 501b of the rotor core holding portion 321b. The oil O on the inner peripheral surface 501b moves to one side in the axial direction along the inclination of the inner peripheral surface 501b. The oil O that has reached the end on the one axial side of the inner peripheral surface 501b is directed radially outward along the inclined surface 501d and flows out of the first shaft recess 321A. In the present embodiment, since the inner peripheral surface 501b is an inclined surface, the oil O smoothly moves to the coil 332 side without staying on the inner peripheral surface 501b. Further, by having the inclined surface portion 501d at the end portion of the inner peripheral surface 501b, the moving direction of the oil O can be smoothly turned from the axial direction to the radial direction, and the main scattering direction of the oil O is directed to the coil 332. be able to. *
第１シャフト凹部３２１Ａから流出したオイルＯは、内周面５０１ｂの軸方向一方側の端部から直接径方向外側へ飛散し、あるいは、フランジ部５０３の表面を伝わって径方向外側へ移動した後に飛散する。飛散したオイルＯは、第１のステータ３３０のコイル３３２に付着し、コイル３３２を冷却する。　本実施形態では、ロータコア保持部３２１ｂがフランジ部５０３を有することで、第１シャフト凹部３２１Ａの開口端の斜面部５０１ｄから径方向外側へ流出するオイルＯを、フランジ部５０３の軸方向一方側の面を伝わらせて滑らかに径方向外側へ飛散させることができる。　 The oil O that has flowed out of the first shaft recess 321A scatters directly from the end on the one axial side of the inner peripheral surface 501b to the outside in the radial direction, or travels radially outward through the surface of the flange portion 503. Scatter. The scattered oil O adheres to the coil 332 of the first stator 330 and cools the coil 332. In this embodiment, the rotor core holding portion 321b has the flange portion 503, so that the oil O flowing out from the inclined surface portion 501d at the opening end of the first shaft concave portion 321A to the radially outer side is disposed on one axial side of the flange portion 503. The surface can be transmitted and smoothly scattered radially outward. *
また本実施形態では、ロータコア保持部３２１ｂの内周面５０１ｂおよびフランジ部５０３と対向する位置にベアリング保持部３１２ｅが配置される。この構成により、第１シャフト凹部３２１Ａから軸方向一方側へ飛散してベアリング保持部３１２ｅに衝突したオイルＯについても、ベアリング保持部３１２ｅの表面形状によって、移動方向を軸方向から径方向へ滑らかに転回させることができる。これにより、効率よくコイル３３２にオイルＯを供給できる。　 In the present embodiment, the bearing holding portion 312e is disposed at a position facing the inner peripheral surface 501b and the flange portion 503 of the rotor core holding portion 321b. With this configuration, the oil O that has scattered from the first shaft recess 321A to one side in the axial direction and collided with the bearing holding portion 312e can be smoothly moved from the axial direction to the radial direction due to the surface shape of the bearing holding portion 312e. Can be turned around. Thereby, the oil O can be efficiently supplied to the coil 332. *
第１の径方向油路９３Ｂから第３分岐油路３６３Ｂに流入したオイルＯは、接続部３２１ｃの軸方向他方側を向く面５０２ｃに位置する開口から第２シャフト凹部３２１Ｂ内へ流入する。第２シャフト凹部３２１Ｂ内に流入したオイルＯは、遠心力により径方向外側へ移動し、ロータコア保持部３２１ｂの内周面５０２ｂに達する。内周面５０２ｂ上のオイルＯは、内周面５０２ｂの傾斜に沿って軸方向他方側へ移動し、内周面５０１ｂの軸方向他方側の端部から第２シャフト凹部３２１Ｂの外側へ流出する。本実施形態では、内周面５０２ｂが傾斜面であることにより、オイルＯが内周面５０２ｂ上に滞留することなく円滑にコイル３３２側へ移動する。　 The oil O that has flowed into the third branch oil passage 363B from the first radial oil passage 93B flows into the second shaft recess 321B from the opening located on the surface 502c facing the other axial side of the connection portion 321c. The oil O that has flowed into the second shaft recess 321B moves outward in the radial direction by centrifugal force and reaches the inner peripheral surface 502b of the rotor core holding portion 321b. The oil O on the inner peripheral surface 502b moves to the other axial side along the inclination of the inner peripheral surface 502b, and flows out of the second axial recess 321B from the other axial end of the inner peripheral surface 501b. . In the present embodiment, since the inner peripheral surface 502b is an inclined surface, the oil O moves smoothly to the coil 332 side without staying on the inner peripheral surface 502b. *
第２シャフト凹部３２１Ｂから流出したオイルＯは、内周面５０２ｂの軸方向他方側の端部から直接径方向外側へ飛散し、あるいは、第２エンドプレート３２５の表面を伝わって径方向外側へ移動した後に飛散する。飛散したオイルＯは、第１のステータ３３０のコイル３３２に付着し、コイル３３２を冷却する。　 The oil O that has flowed out of the second shaft recess 321B directly scatters radially outward from the other axial end of the inner peripheral surface 502b, or travels radially outward along the surface of the second end plate 325. Then splash. The scattered oil O adheres to the coil 332 of the first stator 330 and cools the coil 332. *
本実施形態の発電機３では、図３に示すように、油路の流路断面積が、第１のシャフト内油路９３Ａ、第１の径方向油路９３Ｂ、第３分岐油路３６３Ａ、３６３Ｂの順に小さくなる。１本の第１のシャフト内油路９３Ａから複数の第１の径方向油路９３Ｂが分岐され、さらに１本の第１の径方向油路９３Ｂから２本の第３分岐油路３６３Ａ、３６３Ｂが分岐されるため、分岐される毎に油路を細くすることで、油路全体の流路断面積を維持し、オイルＯを一定の圧力で搬送できる。これにより、オイルＯの流れが分岐した油路の一方に偏ったり、油路中にエアが入り込んでオイルＯが流れなくなる不具合を抑制できる。その結果、所定量のオイルＯをコイル３３２に供給でき、コイル３３２を十分に冷却できる。


In the generator 3 of the present embodiment, as shown in FIG. 3, the flow passage cross-sectional areas of the oil passages are the first shaft oil passage 93A, the first radial oil passage 93B, the third branch oil passage 363A, It becomes small in order of 363B. A plurality of first radial oil passages 93B are branched from one first shaft oil passage 93A, and two third branch oil passages 363A, 363B are further branched from one first radial oil passage 93B. Since the oil passage is narrowed every time it is branched, the cross-sectional area of the entire oil passage can be maintained, and the oil O can be conveyed at a constant pressure. As a result, it is possible to suppress a problem that the flow of the oil O is biased to one of the branched oil passages, or that air enters the oil passage and the oil O does not flow. As a result, a predetermined amount of oil O can be supplied to the coil 332, and the coil 332 can be sufficiently cooled.


本実施形態において、第１のシャフト内油路９３Ａの流路断面積は、分岐される複数の第１の径方向油路９３Ｂの流路断面積の和の９０％以上１１０％以下としてもよい。分岐前後の流路断面積の変化率を１０％以下に抑えることで、第１のシャフト内油路９３Ａから第１の径方向油路９３Ｂへ流れるオイルＯの圧力変動を抑制できる。これにより、コイル３３２へのオイルＯの供給量が周方向でばらつくのを抑制できる。　 In the present embodiment, the flow passage cross-sectional area of the first shaft oil passage 93A may be 90% or more and 110% or less of the sum of the flow passage cross-sectional areas of the plurality of first radial oil passages 93B branched. . By suppressing the change rate of the channel cross-sectional area before and after branching to 10% or less, the pressure fluctuation of the oil O flowing from the first shaft oil passage 93A to the first radial oil passage 93B can be suppressed. Thereby, it can suppress that the supply amount of the oil O to the coil 332 varies in the circumferential direction. *
本実施形態において、第１の径方向油路９３Ｂの流路断面積は、分岐される第３分岐油路３６３Ａ、３６３Ｂの流路断面積の和の９０％以上１１０％以下としてもよい。分岐前後の流路断面積の変化率を１０％以下に抑えることで、第１の径方向油路９３Ｂから２本の第３分岐油路３６３Ａ、３６３Ｂへ流れるオイルＯの圧力変動を抑制できる。これにより、コイル３３２へのオイルＯの供給量が、軸方向一方側と他方側でばらつくのを抑制できる。　 In the present embodiment, the flow passage cross-sectional area of the first radial oil passage 93B may be 90% or more and 110% or less of the sum of the flow passage cross-sectional areas of the third branch oil passages 363A and 363B branched. By suppressing the change rate of the cross-sectional area of the flow path before and after branching to 10% or less, it is possible to suppress the pressure fluctuation of the oil O flowing from the first radial oil path 93B to the two third branch oil paths 363A and 363B. Thereby, it can suppress that the supply amount of the oil O to the coil 332 varies on the one side and the other side in the axial direction. *
第１のシャフト内油路９３Ａを流通するオイルＯの一部は、ベアリング潤滑用油路３６４Ａを通ってシャフト本体部３２１ａの外周面の開口から流出し、ベアリング３７０に供給される。また、オイルＯの他の一部は、第１のシャフト内油路９３Ａからベアリング潤滑用油路３６４Ｂを通ってシャフト本体部３２１ａの外周面の開口から流出し、ベアリング３７１に供給される。これにより、オイルＯは、ベアリング３７０，３７１の潤滑剤として利用される。　 Part of the oil O flowing through the first in-shaft oil passage 93 </ b> A flows out from the opening on the outer peripheral surface of the shaft main body 321 a through the bearing lubrication oil passage 364 </ b> A and is supplied to the bearing 370. Further, the other part of the oil O flows out from the opening in the outer peripheral surface of the shaft main body portion 321 a from the first in-shaft oil passage 93 </ b> A through the bearing lubrication oil passage 364 </ b> B, and is supplied to the bearing 371. As a result, the oil O is used as a lubricant for the bearings 370 and 371. *
本実施形態では、ベアリング潤滑用油路３６４Ａ、３６４Ｂは、第１のシャフト内油路９３Ａから分岐される。したがって、上記流路断面積の関係は、ベアリング潤滑用油路３６４Ａ、３６４Ｂの流路断面積を考慮してもよい。すなわち、第１のシャフト内油路９３Ａの流路断面積は、第１のシャフト内油路９３Ａから分岐される複数の第１の径方向油路９３Ｂおよびベアリング潤滑用油路３６４Ａ、３６４Ｂの流路断面積の和の９０％以上１１０％以下としてもよい。これにより、第１のシャフト内油路９３Ａから分岐される各油路において圧力変動を抑制でき、オイルＯの吐出量がばらつくのを抑制できる。　 In the present embodiment, the bearing lubrication oil passages 364A and 364B are branched from the first in-shaft oil passage 93A. Therefore, the relationship between the flow passage cross-sectional areas may take into account the flow passage cross-sectional areas of the bearing lubrication oil passages 364A and 364B. That is, the flow passage cross-sectional area of the first shaft oil passage 93A is the flow of the plurality of first radial oil passages 93B and bearing lubrication oil passages 364A and 364B branched from the first shaft oil passage 93A. It may be 90% or more and 110% or less of the sum of the road cross-sectional areas. Thereby, pressure fluctuation can be suppressed in each oil passage branched from the first shaft oil passage 93A, and variation in the discharge amount of the oil O can be suppressed. *
以上のようにして、第１のシャフト３２０ａの回転によって第１のポンプ部３４０を駆動し、第１のポンプ部３４０によってハウジング１０に貯留されるオイルＯを吸い上げて第１のロータ３２０、第１のステータ３３０およびベアリング３７０，３７１に供給できる。これにより、ハウジング１０に貯留されるオイルＯを利用して、第１のロータ３２０および第１のステータ３３０を冷却できるとともに、ベアリング３７０，３７１とシャフト本体部３２１ａとの間の潤滑性を向上できる。第１のステータ３３０およびベアリング３７０，３７１に供給されたオイルＯは、発電機収容部３１４内を落下して、再び発電機収容部３１４の下側の領域に貯留される。これにより、発電機収容部３１４内のオイルＯを循環させることができる。　 As described above, the first pump unit 340 is driven by the rotation of the first shaft 320a, and the oil O stored in the housing 10 is sucked up by the first pump unit 340, and the first rotor 320, first The stator 330 and the bearings 370 and 371 can be supplied. Thereby, the oil O stored in the housing 10 can be used to cool the first rotor 320 and the first stator 330, and the lubricity between the bearings 370 and 371 and the shaft main body 321a can be improved. . The oil O supplied to the first stator 330 and the bearings 370 and 371 falls in the generator housing portion 314 and is stored again in the lower region of the generator housing portion 314. Thereby, the oil O in the generator accommodating part 314 can be circulated. *



＜モータ＞



　次にモータ２の具体的な構成について説明する。　図４に示すように、本実施形態のモータ２は、ハウジング１０と、一方向に延びる第２の回転軸Ｊ２に沿って配置される第２のシャフト２０ａを有する第２のロータ２０と、回転検出部８０と、第２のステータ３０と、第２のポンプ部４０と、ベアリング７０，７１と、を備える。　


<Motor>



Next, a specific configuration of the motor 2 will be described. As shown in FIG. 4, the motor 2 of this embodiment includes a housing 10, a second rotor 20 having a second shaft 20 a disposed along a second rotation axis J <b> 2 extending in one direction, and rotation. The detection part 80, the 2nd stator 30, the 2nd pump part 40, and the bearings 70 and 71 are provided.
第２の回転軸Ｊ２は、図４の左右方向に延びる。すなわち、本実施形態においては、図４の左右方向が一方向に相当する。以下のモータ２の説明においては、第２の回転軸Ｊ２の軸方向と平行な方向を単に「軸方向」と呼び、第２の回転軸Ｊ２を中心とする径方向を単に「径方向」と呼び、第２の回転軸Ｊ２を中心とする周方向を単に「周方向」と呼ぶ。また、軸方向のうち図４の左側を、「軸方向一方側」と呼び、軸方向のうち図４の右側を、「軸方向他方側」と呼ぶ。　 The second rotation axis J2 extends in the left-right direction in FIG. That is, in this embodiment, the left-right direction in FIG. 4 corresponds to one direction. In the following description of the motor 2, a direction parallel to the axial direction of the second rotation axis J <b> 2 is simply referred to as “axial direction”, and a radial direction around the second rotation axis J <b> 2 is simply referred to as “radial direction”. The circumferential direction around the second rotation axis J2 is simply referred to as “circumferential direction”. Further, the left side of FIG. 4 in the axial direction is referred to as “one axial side”, and the right side of FIG. 4 in the axial direction is referred to as “the other axial side”. *
ハウジング１０は、モータ収容本体部１１と、内蓋部１２と、外蓋部１３と、を有する。本実施形態においてモータ収容本体部１１と内蓋部１２と外蓋部１３とは、互いに別部材である。モータ収容本体部１１は、軸方向一方側に開口する有底の筒状である。モータ収容本体部１１は、底部１１ａと、本体筒部１１ｂと、ベアリング保持部１１ｃと、を有する。底部１１ａは、径方向に拡がる円環板状である。本体筒部１１ｂは、底部１１ａの径方向外縁部から軸方向一方側に延びる円筒状である。ベアリング保持部１１ｃは、底部１１ａの内縁部から軸方向一方側に突出する円筒状である。ベアリング保持部１１ｃは、内周面にベアリング７１を保持する。　 The housing 10 includes a motor housing main body portion 11, an inner lid portion 12, and an outer lid portion 13. In the present embodiment, the motor housing main body 11, the inner lid 12, and the outer lid 13 are separate members. The motor housing main body 11 has a bottomed cylindrical shape that opens to one side in the axial direction. The motor housing body 11 has a bottom 11a, a body cylinder 11b, and a bearing holding part 11c. The bottom portion 11a has an annular plate shape that expands in the radial direction. The main body cylinder portion 11b has a cylindrical shape extending from the radially outer edge portion of the bottom portion 11a to one side in the axial direction. The bearing holding portion 11c has a cylindrical shape protruding from the inner edge portion of the bottom portion 11a to one side in the axial direction. The bearing holding portion 11c holds the bearing 71 on the inner peripheral surface. *
内蓋部１２は、モータ収容本体部１１の軸方向一方側に取り付けられる。内蓋部１２は、円環板部１２ａと、外筒部１２ｂと、内筒部１２ｃと、内筒底部１２ｄと、ベアリング保持部１２ｅと、を有する。円環板部１２ａは、径方向に拡がる円環板状である。円環板部１２ａは、第２のステータ３０の軸方向一方側を覆う。すなわち、内蓋部１２は、第２のステータ３０の軸方向一方側を覆う。　 The inner lid part 12 is attached to one side in the axial direction of the motor housing main body part 11. The inner lid portion 12 includes an annular plate portion 12a, an outer cylinder portion 12b, an inner cylinder portion 12c, an inner cylinder bottom portion 12d, and a bearing holding portion 12e. The annular plate portion 12a has an annular plate shape that extends in the radial direction. The annular plate portion 12 a covers one axial side of the second stator 30. That is, the inner lid portion 12 covers one side of the second stator 30 in the axial direction. *
外筒部１２ｂは、円環板部１２ａの径方向外縁部から軸方向他方側に延びる円筒状である。外筒部１２ｂの軸方向他方側の端部は、本体筒部１１ｂの軸方向一方側の端部と接触して固定される。内筒部１２ｃは、円環板部１２ａの径方向内縁部から軸方向他方側に延びる円筒状である。内筒底部１２ｄは、内筒部１２ｃの軸方向他方側の端部から径方向内側に拡がる円環状である。内筒部１２ｃと内筒底部１２ｄとによって、内蓋部１２には、内蓋部１２の軸方向一方側の面から軸方向他方側に窪む第２凹部１２ｇが設けられる。すなわち、内蓋部１２は、第２凹部１２ｇを有する。内蓋部１２の軸方向一方側の面とは、本実施形態では円環板部１２ａの軸方向一方側の面である。第２凹部１２ｇの内側面は、内筒部１２ｃの径方向内側面と内筒底部１２ｄの軸方向一方側の面とを含む。　 The outer cylinder part 12b is a cylindrical shape extended from the radial direction outer edge part of the annular plate part 12a to the other side of an axial direction. The end portion on the other side in the axial direction of the outer tube portion 12b is fixed in contact with the end portion on the one side in the axial direction of the main body tube portion 11b. The inner cylinder portion 12c has a cylindrical shape extending from the radially inner edge of the annular plate portion 12a to the other side in the axial direction. The inner cylinder bottom portion 12d has an annular shape that extends radially inward from the other axial end of the inner cylinder portion 12c. Due to the inner cylinder portion 12c and the inner cylinder bottom portion 12d, the inner lid portion 12 is provided with a second recess 12g that is recessed from the surface on the one axial side of the inner lid portion 12 to the other axial side. That is, the inner lid part 12 has the 2nd recessed part 12g. In this embodiment, the surface on the one side in the axial direction of the inner lid portion 12 is the surface on the one side in the axial direction of the annular plate portion 12a. The inner side surface of the second recess 12g includes a radially inner side surface of the inner cylinder portion 12c and a surface on one axial side of the inner cylinder bottom portion 12d. *
ベアリング保持部１２ｅは、内筒底部１２ｄの軸方向他方側の面から軸方向他方側に突出する円筒状である。ベアリング保持部１２ｅは、内周面にベアリング７０を保持する。すなわち、内蓋部１２は、ベアリング７０を保持する。　 The bearing holding portion 12e has a cylindrical shape that protrudes from the surface on the other axial side of the inner cylinder bottom portion 12d to the other axial side. The bearing holding part 12e holds the bearing 70 on the inner peripheral surface. That is, the inner lid portion 12 holds the bearing 70. *
モータ収容本体部１１と内蓋部１２とが互いに固定されることで、モータ収容本体部１１と内蓋部１２とによって囲まれたモータ収容部１４が構成される。すなわち、ハウジング１０は、モータ収容部１４を有する。モータ収容部１４の内部には、モータ室１９Ａ（図１参照）が構成される。モータ収容部１４は、第２のロータ２０および第２のステータ３０を収容する。　 By fixing the motor housing main body 11 and the inner lid 12 to each other, a motor housing 14 surrounded by the motor housing main body 11 and the inner lid 12 is configured. That is, the housing 10 has a motor housing portion 14. A motor chamber 19 </ b> A (see FIG. 1) is configured inside the motor housing portion 14. The motor housing portion 14 houses the second rotor 20 and the second stator 30. *
外蓋部１３は、内蓋部１２の軸方向一方側に取り付けられる。外蓋部１３は、外蓋本体部１３ａと、栓体部１３ｂと、を有する。外蓋本体部１３ａは、径方向に拡がる。外蓋本体部１３ａは、蓋板部１３ｃと、突出部１３ｄと、を有する。蓋板部１３ｃは、径方向に拡がる円板状である。蓋板部１３ｃの径方向外縁部は、円環板部１２ａの径方向外縁部に固定される。蓋板部１３ｃの軸方向他方側の面は、円環板部１２ａの軸方向一方側の面と接触する。突出部１３ｄは、蓋板部１３ｃの中央部から軸方向他方側に突出する。突出部１３ｄは、内筒部１２ｃに軸方向一方側から挿入される。突出部１３ｄは、内筒底部１２ｄの軸方向一方側に間隔を空けて配置される。　 The outer lid portion 13 is attached to one side in the axial direction of the inner lid portion 12. The outer lid portion 13 includes an outer lid main body portion 13a and a plug body portion 13b. The outer lid body 13a expands in the radial direction. The outer lid main body portion 13a includes a lid plate portion 13c and a protruding portion 13d. The lid plate portion 13c has a disk shape that expands in the radial direction. The radially outer edge portion of the lid plate portion 13c is fixed to the radially outer edge portion of the annular plate portion 12a. The surface on the other side in the axial direction of the cover plate portion 13c is in contact with the surface on the one side in the axial direction of the annular plate portion 12a. The protruding portion 13d protrudes from the center portion of the lid plate portion 13c to the other side in the axial direction. The protruding portion 13d is inserted into the inner cylinder portion 12c from one side in the axial direction. The protruding portion 13d is disposed at an interval on one side in the axial direction of the inner cylinder bottom portion 12d. *
外蓋本体部１３ａは、第１凹部１３ｅと、第２貫通孔１３ｆと、を有する。第１凹部１３ｅは、外蓋本体部１３ａの軸方向一方側の面から軸方向他方側に窪む。第１凹部１３ｅは、外蓋本体部１３ａの中央部に設けられ、蓋板部１３ｃと突出部１３ｄとに跨って設けられる。第２貫通孔１３ｆは、第１凹部１３ｅの底面から突出部１３ｄの軸方向他方側の面まで貫通する。すなわち、第２貫通孔１３ｆは、第１凹部１３ｅの底面からハウジング１０の内部まで貫通する。第２貫通孔１３ｆは、第２凹部１２ｇの内部に開口する。これにより、第２貫通孔１３ｆは、第１凹部１３ｅの内部と第２凹部１２ｇの内部とを繋ぐ。第２貫通孔１３ｆには、第２の回転軸Ｊ２が通る。　 The outer lid main body 13a has a first recess 13e and a second through hole 13f. The first recess 13e is recessed from the surface on one side in the axial direction of the outer lid main body 13a to the other side in the axial direction. The 1st recessed part 13e is provided in the center part of the outer cover main-body part 13a, and is provided ranging over the cover board part 13c and the protrusion part 13d. The second through hole 13f penetrates from the bottom surface of the first recess 13e to the other surface in the axial direction of the protrusion 13d. That is, the second through hole 13f penetrates from the bottom surface of the first recess 13e to the inside of the housing 10. The second through hole 13f opens inside the second recess 12g. Thereby, the second through hole 13f connects the inside of the first recess 13e and the inside of the second recess 12g. The second rotation axis J2 passes through the second through hole 13f. *
栓体部１３ｂは、第１凹部１３ｅに嵌め込まれて外蓋本体部１３ａに固定される。栓体部１３ｂは、第１凹部１３ｅの軸方向一方側の開口を閉塞する。栓体部１３ｂは、第２のシャフト２０ａの軸方向一方側を覆う。すなわち、外蓋部１３は、第２のシャフト２０ａの軸方向一方側を覆う。栓体部１３ｂは、軸方向一方側の端部に径方向外側に突出する鍔部１３ｇを有する。鍔部１３ｇは、蓋板部１３ｃの軸方向一方側の面に接触する。これにより、栓体部１３ｂを軸方向に位置決めできる。　 The plug body portion 13b is fitted into the first recess 13e and is fixed to the outer lid main body portion 13a. The plug part 13b closes the opening on the one axial side of the first recess 13e. The plug part 13b covers one side in the axial direction of the second shaft 20a. That is, the outer lid portion 13 covers one axial side of the second shaft 20a. The plug body portion 13b has a flange portion 13g that protrudes radially outward at an end portion on one axial side. The flange portion 13g contacts the surface on one side in the axial direction of the lid plate portion 13c. Thereby, the plug part 13b can be positioned in an axial direction. *
外蓋部１３には、ポンプ室４６が設けられる。ポンプ室４６は、栓体部１３ｂの軸方向他方側の面と第１凹部１３ｅの底面との軸方向の間に設けられる。本実施形態においてポンプ室４６の軸方向他方側の面は、第１凹部１３ｅの底面である。ポンプ室４６の軸方向一方側の面は、栓体部１３ｂの軸方向他方側の面である。ポンプ室４６は、第１凹部１３ｅの内部のうちの軸方向他方側の端部である。ポンプ室４６は、内筒部１２ｃの径方向内側、すなわち第２凹部１２ｇの内部に配置される。ポンプ室４６には、第２の回転軸Ｊ２が通る。図５に示すように、軸方向視において、ポンプ室４６の外形は、円形状である。ポンプ室４６は、後述する内歯歯車４３および外歯歯車４２を収容する。　 A pump chamber 46 is provided in the outer lid portion 13. The pump chamber 46 is provided between the axial direction other side surface of the plug part 13b and the bottom surface of the first recess 13e. In the present embodiment, the surface on the other axial side of the pump chamber 46 is the bottom surface of the first recess 13e. The surface on the one axial side of the pump chamber 46 is the surface on the other axial side of the plug body portion 13b. The pump chamber 46 is an end on the other side in the axial direction of the inside of the first recess 13e. The pump chamber 46 is disposed on the radially inner side of the inner cylinder portion 12c, that is, inside the second recess 12g. The second rotation axis J2 passes through the pump chamber 46. As shown in FIG. 5, the outer shape of the pump chamber 46 is circular when viewed in the axial direction. The pump chamber 46 accommodates an internal gear 43 and an external gear 42 which will be described later. *
図４に示すように、ハウジング１０は、蓋内油路６１と、第２の吸い上げ油路９６と、を有する。蓋内油路６１は、外蓋部１３に設けられる。より詳細には、蓋内油路６１は、栓体部１３ｂに設けられる。そのため、栓体部１３ｂを交換することで、容易に蓋内油路６１の構成を変えることができる。蓋内油路６１は、ポンプ室４６の軸方向一方側に配置される。蓋内油路６１は、ポンプ室４６の軸方向一方側において、ポンプ室４６の上端部とポンプ室４６の中央部とを繋ぐ。蓋内油路６１におけるポンプ室４６と繋がる部分は、栓体部１３ｂの軸方向他方側の面に開口する。　 As shown in FIG. 4, the housing 10 includes an in-lid oil passage 61 and a second suction oil passage 96. The in-lid oil passage 61 is provided in the outer lid portion 13. More specifically, the in-lid oil passage 61 is provided in the plug body portion 13b. Therefore, the configuration of the in-lid oil passage 61 can be easily changed by replacing the plug body portion 13b. The in-lid oil passage 61 is disposed on one axial side of the pump chamber 46. The oil passage 61 in the lid connects the upper end portion of the pump chamber 46 and the central portion of the pump chamber 46 on one axial side of the pump chamber 46. A portion connected to the pump chamber 46 in the oil passage 61 in the lid opens on the surface on the other axial side of the plug body portion 13b. *
ポンプ室４６における蓋内油路６１と繋がる上端部は、吐出口４５である。すなわち、蓋内油路６１は、吐出口４５と繋がる。ポンプ室４６における蓋内油路６１と繋がる中央部は、接続口６１ａである。図５に示すように、吐出口４５と接続口６１ａとは、例えば、円形状である。吐出口４５は、接続口６１ａよりも上側に配置される。接続口６１ａには、第２の回転軸Ｊ２が通る。　 An upper end portion connected to the in-lid oil passage 61 in the pump chamber 46 is a discharge port 45. That is, the in-lid oil passage 61 is connected to the discharge port 45. A central portion connected to the in-lid oil passage 61 in the pump chamber 46 is a connection port 61a. As shown in FIG. 5, the discharge port 45 and the connection port 61a are, for example, circular. The discharge port 45 is disposed above the connection port 61a. The second rotation axis J2 passes through the connection port 61a. *
第２のロータ２０は、第２のシャフト２０ａと、ロータコア２２と、マグネット２３と、第１エンドプレート２４と、第２エンドプレート２５と、を有する。第２のシャフト２０ａは、モータシャフト本体２１と、取付部材５０と、を有する。モータシャフト本体２１は、軸方向に延びる円柱状である。モータシャフト本体２１は、大径部２１ａと、第１中径部２１ｂと、第２中径部２１ｃと、小径部２１ｄと、出力部２１ｅと、を有する。　 The second rotor 20 includes a second shaft 20 a, a rotor core 22, a magnet 23, a first end plate 24, and a second end plate 25. The second shaft 20 a includes a motor shaft main body 21 and an attachment member 50. The motor shaft body 21 has a cylindrical shape extending in the axial direction. The motor shaft main body 21 has a large diameter portion 21a, a first medium diameter portion 21b, a second medium diameter portion 21c, a small diameter portion 21d, and an output portion 21e. *
大径部２１ａは、ロータコア２２が取り付けられる部分である。大径部２１ａの軸方向一方側の端部における外周面には、雄ネジ部が設けられる。大径部２１ａの雄ネジ部には、ナット８８が締め込まれる。第１中径部２１ｂは、大径部２１ａの軸方向一方側において大径部２１ａに繋がる。第１中径部２１ｂの外径は、大径部２１ａの外径よりも小さい。第１中径部２１ｂの軸方向他方側の端部は、ベアリング７０に回転可能に支持される。　 The large diameter portion 21a is a portion to which the rotor core 22 is attached. A male screw portion is provided on the outer peripheral surface of the end portion on one axial side of the large diameter portion 21a. A nut 88 is fastened to the male screw portion of the large diameter portion 21a. The first medium diameter portion 21b is connected to the large diameter portion 21a on one axial side of the large diameter portion 21a. The outer diameter of the first medium diameter portion 21b is smaller than the outer diameter of the large diameter portion 21a. The end portion on the other axial side of the first medium diameter portion 21b is rotatably supported by the bearing 70. *
第２中径部２１ｃは、大径部２１ａの軸方向他方側において大径部２１ａに繋がる。第２中径部２１ｃの外径は、大径部２１ａの外径よりも小さい。第２中径部２１ｃの軸方向一方側の端部は、ベアリング７１に回転可能に支持される。ベアリング７０，７１は、第２のシャフト２０ａを回転可能に支持する。ベアリング７０，７１は、例えば、ボールベアリングである。　 The second medium diameter portion 21c is connected to the large diameter portion 21a on the other axial side of the large diameter portion 21a. The outer diameter of the second medium diameter portion 21c is smaller than the outer diameter of the large diameter portion 21a. The end portion on the one axial side of the second medium diameter portion 21c is rotatably supported by the bearing 71. The bearings 70 and 71 rotatably support the second shaft 20a. The bearings 70 and 71 are ball bearings, for example. *
小径部２１ｄは、第１中径部２１ｂの軸方向一方側において第１中径部２１ｂに繋がる。小径部２１ｄの軸方向一方側の端部は、モータシャフト本体２１の軸方向一方側の端部である。小径部２１ｄの軸方向一方側の端部は、内筒部１２ｃの径方向内側に配置される。小径部２１ｄの外径は、第１中径部２１ｂの外径よりも小さい。すなわち、小径部２１ｄは、軸方向一方側に向かって外径が小さくなる部分である。　 The small diameter portion 21d is connected to the first medium diameter portion 21b on one axial side of the first medium diameter portion 21b. An end portion on one side in the axial direction of the small diameter portion 21 d is an end portion on one side in the axial direction of the motor shaft main body 21. The end portion on one side in the axial direction of the small diameter portion 21d is disposed on the radially inner side of the inner cylinder portion 12c. The outer diameter of the small diameter portion 21d is smaller than the outer diameter of the first medium diameter portion 21b. That is, the small diameter portion 21d is a portion whose outer diameter decreases toward one side in the axial direction. *
出力部２１ｅは、第２中径部２１ｃの軸方向他方側において第２中径部２１ｃに繋がる。出力部２１ｅは、モータシャフト本体２１の軸方向他方側の端部である。出力部２１ｅの外径は、小径部２１ｄの外径よりも小さい。出力部２１ｅは、底部１１ａを軸方向に貫通してハウジング１０の外部に突出する。　 The output part 21e is connected to the second medium diameter part 21c on the other axial side of the second medium diameter part 21c. The output portion 21e is an end portion on the other side in the axial direction of the motor shaft main body 21. The outer diameter of the output part 21e is smaller than the outer diameter of the small diameter part 21d. The output portion 21e protrudes outside the housing 10 through the bottom portion 11a in the axial direction. *
モータシャフト本体２１は、フランジ部２１ｆを有する。フランジ部２１ｆは、大径部２１ａの外周面から径方向外側に突出する。フランジ部２１ｆは、大径部２１ａの外周面の一周に亘って設けられる円環板状である。フランジ部２１ｆは、大径部２１ａの軸方向他方側の端部に設けられる。モータシャフト本体２１は、モータシャフト本体２１の軸方向一方側の端部から軸方向他方側に延びる穴部２１ｇを有する。穴部２１ｇは、軸方向一方側に開口する有底の穴である。すなわち、穴部２１ｇの軸方向他方側の端部は、閉塞される。　 The motor shaft main body 21 has a flange portion 21f. The flange portion 21f protrudes radially outward from the outer peripheral surface of the large diameter portion 21a. The flange portion 21f has an annular plate shape that is provided over the circumference of the outer peripheral surface of the large diameter portion 21a. The flange portion 21f is provided at the end portion on the other axial side of the large diameter portion 21a. The motor shaft main body 21 has a hole 21g extending from the end on one side in the axial direction of the motor shaft main body 21 to the other side in the axial direction. The hole 21g is a bottomed hole that opens to one side in the axial direction. That is, the end on the other axial side of the hole 21g is closed. *
取付部材５０は、モータシャフト本体２１の軸方向一方側に固定される。取付部材５０は、穴部２１ｇに嵌め合わされて固定される。取付部材５０は、軸方向両側に開口する筒状である。本実施形態において取付部材５０は、第２の回転軸Ｊ２と中心とする円筒状である。取付部材５０は、モータシャフト本体２１よりも軸方向一方側に延びて、第２貫通孔１３ｆに通される。　 The attachment member 50 is fixed to one side in the axial direction of the motor shaft main body 21. The attachment member 50 is fitted into the hole 21g and fixed. The attachment member 50 has a cylindrical shape that opens on both sides in the axial direction. In the present embodiment, the attachment member 50 has a cylindrical shape centered on the second rotation axis J2. The attachment member 50 extends to one side in the axial direction from the motor shaft main body 21 and passes through the second through hole 13f. *
取付部材５０は、嵌合部５１と、固定部５２と、を有する。嵌合部５１は、穴部２１ｇに嵌め合わされる部分である。嵌合部５１は、穴部２１ｇの軸方向一方側の端部の内周面に固定され、穴部２１ｇ内からモータシャフト本体２１よりも軸方向一方側まで延びる。嵌合部５１の軸方向一方側の端部は、第２貫通孔１３ｆに挿入される。すなわち、嵌合部５１の少なくとも一部は、第２貫通孔１３ｆに挿入される。そのため、取付部材５０の外周面と第２貫通孔１３ｆの内周面との径方向の隙間を大きくできる。これにより、振動等によって取付部材５０の位置が径方向にずれた場合であっても、取付部材５０が第２貫通孔１３ｆの内周面と接触することを抑制できる。　 The attachment member 50 includes a fitting part 51 and a fixing part 52. The fitting part 51 is a part fitted in the hole part 21g. The fitting portion 51 is fixed to the inner peripheral surface of the end portion on one side in the axial direction of the hole portion 21g, and extends from the inside of the hole portion 21g to one side in the axial direction than the motor shaft main body 21. One end of the fitting part 51 in the axial direction is inserted into the second through hole 13f. That is, at least a part of the fitting portion 51 is inserted into the second through hole 13f. Therefore, the radial gap between the outer peripheral surface of the mounting member 50 and the inner peripheral surface of the second through hole 13f can be increased. Thereby, even if it is a case where the position of the attachment member 50 shifts | deviates to radial direction by vibration etc., it can suppress that the attachment member 50 contacts the internal peripheral surface of the 2nd through-hole 13f. *
固定部５２は、嵌合部５１の軸方向一方側に位置する。固定部５２は、嵌合部５１の軸方向一方側の端部に繋がる。固定部５２の外径は、嵌合部５１の外径よりも大きく、第２貫通孔１３ｆの内径よりも小さい。固定部５２は、ポンプ室４６内に挿入される。嵌合部５１の内径と固定部５２の内径とは、例えば、同じである。　 The fixing part 52 is located on one side in the axial direction of the fitting part 51. The fixing portion 52 is connected to the end portion on one side in the axial direction of the fitting portion 51. The outer diameter of the fixing portion 52 is larger than the outer diameter of the fitting portion 51 and smaller than the inner diameter of the second through hole 13f. The fixing portion 52 is inserted into the pump chamber 46. The inner diameter of the fitting part 51 and the inner diameter of the fixed part 52 are, for example, the same. *
取付部材５０には、後述する外歯歯車４２が固定される。本実施形態では、外歯歯車４２は、固定部５２の径方向外側面に固定される。より詳細には、外歯歯車４２を軸方向に貫通する固定孔部４２ｂに、固定部５２が嵌め合わされて固定される。このように、本実施形態によれば、固定部５２より外径が小さい嵌合部５１を穴部２１ｇに嵌め合わせ、嵌合部５１よりも外径が大
きい固定部５２に外歯歯車４２を固定する。そのため、穴部２１ｇの内径を外歯歯車４２の固定孔部４２ｂの内径よりも小さくできる。これにより、穴部２１ｇの内径を比較的小さくしやすく、モータシャフト本体２１の剛性が低下することを抑制できる。　 An external gear 42 described later is fixed to the attachment member 50. In the present embodiment, the external gear 42 is fixed to the radially outer surface of the fixing portion 52. More specifically, the fixing portion 52 is fitted and fixed in a fixing hole portion 42b that penetrates the external gear 42 in the axial direction. Thus, according to the present embodiment, the fitting portion 51 having an outer diameter smaller than that of the fixing portion 52 is fitted into the hole portion 21g, and the external gear 42 is attached to the fixing portion 52 having an outer diameter larger than that of the fitting portion 51. Fix it. Therefore, the inner diameter of the hole portion 21g can be made smaller than the inner diameter of the fixed hole portion 42b of the external gear 42. Thereby, it is easy to make the internal diameter of the hole 21g comparatively small, and it can suppress that the rigidity of the motor shaft main body 21 falls.
第２のシャフト２０ａは、第２のシャフト２０ａの内部に設けられる第２のシャフト内油路９７Ａを有する。第２のシャフト内油路９７Ａは、第２のシャフト２０ａの軸方向一方側の端部から軸方向他方側に窪んで延びる有底の穴部である。第２のシャフト内油路９７Ａは、軸方向一方側に開口する。第２のシャフト内油路９７Ａは、取付部材５０の軸方向一方側の端部から第２中径部２１ｃの軸方向他方側の端部まで延びて、取付部材５０とモータシャフト本体２１とに跨って設けられる。第２のシャフト内油路９７Ａは、取付部材５０の内部と穴部２１ｇとが軸方向に繋がって構成される。すなわち、取付部材５０の径方向内側面は、第２のシャフト内油路９７Ａの径方向内側面の一部を構成する。　 The second shaft 20a has a second in-shaft oil passage 97A provided inside the second shaft 20a. The second shaft oil passage 97A is a bottomed hole that extends from the end on the one axial side of the second shaft 20a so as to be recessed toward the other axial side. The second in-shaft oil passage 97A opens to one axial side. The second shaft oil passage 97 </ b> A extends from one end of the mounting member 50 in the axial direction to the other end of the second medium diameter portion 21 c in the axial direction. It is provided across. The second in-shaft oil passage 97A is configured by connecting the inside of the attachment member 50 and the hole 21g in the axial direction. That is, the radially inner side surface of the mounting member 50 constitutes a part of the radially inner side surface of the second shaft oil passage 97A. *
本実施形態において軸方向と直交する断面において第２のシャフト内油路９７Ａの内縁は、第２の回転軸Ｊ２を中心とする円形状である。第２のシャフト内油路９７Ａにおける取付部材５０に設けられる部分の内径は、第２のシャフト内油路９７Ａにおけるモータシャフト本体２１に設けられる部分の内径よりも小さい。すなわち、取付部材５０の内径は、穴部２１ｇの内径よりも小さい。取付部材５０の軸方向一方側の開口が接続口６１ａと繋がることで、第２のシャフト内油路９７Ａは、取付部材５０の内部を介して蓋内油路６１と繋がる。すなわち、第２のシャフト内油路９７Ａは、第２のシャフト２０ａの軸方向一方側の端部において蓋内油路６１に開口する。　 In the present embodiment, the inner edge of the second shaft oil passage 97A has a circular shape with the second rotation axis J2 as the center in the cross section orthogonal to the axial direction. The inner diameter of the portion provided in the mounting member 50 in the second shaft oil passage 97A is smaller than the inner diameter of the portion provided in the motor shaft main body 21 in the second shaft oil passage 97A. That is, the inner diameter of the mounting member 50 is smaller than the inner diameter of the hole 21g. The opening on one side in the axial direction of the mounting member 50 is connected to the connection port 61 a, whereby the second shaft oil passage 97 </ b> A is connected to the lid oil passage 61 through the inside of the attachment member 50. In other words, the second shaft oil passage 97 </ b> A opens into the lid oil passage 61 at the end on one axial side of the second shaft 20 a. *
第２のシャフト２０ａは、第２のシャフト内油路９７Ａと第２のシャフト２０ａの外周面とを繋ぐ第１貫通孔２６ａ～２６ｄを有する。第１貫通孔２６ａ～２６ｄは、第２の径方向油路９７Ｂとして機能する。第１貫通孔２６ａ～２６ｄは、径方向に延びる。第１貫通孔２６ａ，２６ｂは、大径部２１ａに設けられる。第１貫通孔２６ａ，２６ｂは、軸方向において、ナット８８とフランジ部２１ｆとの間に配置される。図６に示すように、第１貫通孔２６ａの径方向外側の端部は、第１エンドプレート２４とロータコア２２との軸方向の隙間２７ａに開口する。第１貫通孔２６ｂの径方向外側の端部は、第２エンドプレート２５とロータコア２２との軸方向の隙間２７ｂに開口する。　 The second shaft 20a has first through holes 26a to 26d that connect the second in-shaft oil passage 97A and the outer peripheral surface of the second shaft 20a. The first through holes 26a to 26d function as the second radial oil passage 97B. The first through holes 26a to 26d extend in the radial direction. The first through holes 26a and 26b are provided in the large diameter portion 21a. The first through holes 26a and 26b are disposed between the nut 88 and the flange portion 21f in the axial direction. As shown in FIG. 6, the radially outer end of the first through hole 26 a opens in the axial gap 27 a between the first end plate 24 and the rotor core 22. The radially outer end of the first through hole 26 b opens in the axial gap 27 b between the second end plate 25 and the rotor core 22. *
第１貫通孔２６ｃは、第１中径部２１ｂに設けられる。第１貫通孔２６ｃの径方向外側の端部は、ベアリング７０の軸方向一方側においてベアリング保持部１２ｅの径方向内側に開口する。第１貫通孔２６ｄは、第２中径部２１ｃに設けられる。第１貫通孔２６ｄの径方向外側の端部は、ベアリング７１の軸方向他方側においてベアリング保持部１１ｃの径方向内側に開口する。第１貫通孔２６ａ～２６ｄは、例えば、それぞれ周方向に沿って複数設けられる。　 The first through hole 26c is provided in the first medium diameter portion 21b. The radially outer end of the first through hole 26c opens on the radially inner side of the bearing holding portion 12e on one axial side of the bearing 70. The first through hole 26d is provided in the second medium diameter portion 21c. The radially outer end of the first through hole 26d opens on the radially inner side of the bearing holding portion 11c on the other axial side of the bearing 71. For example, a plurality of first through holes 26a to 26d are provided along the circumferential direction. *
図４に示すように、ロータコア２２はモータシャフト本体２１に固定される円環状である。本実施形態においてロータコア２２は大径部２１ａに嵌め合わされる。ロータコア２２はロータコア２２を軸方向に貫通するマグネット挿入孔２２ｂを有する。マグネット挿入孔２２ｂは周方向に沿って複数設けられる。マグネット２３はマグネット挿入孔２２ｂに挿入される。　 As shown in FIG. 4, the rotor core 22 has an annular shape fixed to the motor shaft main body 21. In the present embodiment, the rotor core 22 is fitted into the large diameter portion 21a. The rotor core 22 has a magnet insertion hole 22b that penetrates the rotor core 22 in the axial direction. A plurality of magnet insertion holes 22b are provided along the circumferential direction. The magnet 23 is inserted into the magnet insertion hole 22b. *
第１エンドプレート２４および第２エンドプレート２５は、径方向に拡がる円環板状である。第１エンドプレート２４および第２エンドプレート２５には、大径部２１ａが通される。第１エンドプレート２４と第２エンドプレート２５とは、ロータコア２２と接触した状態で、ロータコア２２を軸方向に挟む。　 The first end plate 24 and the second end plate 25 have an annular plate shape that expands in the radial direction. A large diameter portion 21 a is passed through the first end plate 24 and the second end plate 25. The first end plate 24 and the second end plate 25 sandwich the rotor core 22 in the axial direction while being in contact with the rotor core 22. *
図６に示すように、第１エンドプレート２４は、ロータコア２２の軸方向一方側に配置される。第１エンドプレート２４の径方向外縁部は、軸方向他方側に突出し、ロータコア２２の軸方向一方側の面のうち径方向外縁部と接触する。第１エンドプレート２４の径方向外縁部は、マグネット挿入孔２２ｂの軸方向一方側の開口部と軸方向に重なり、マグネット挿入孔２２ｂに挿入されたマグネット２３を軸方向一方側から押さえる。第１エンドプレート２４の径方向外縁部よりも径方向内側の部分は、ロータコア２２の軸方向一方側の面と軸方向に隙間２７ａを介して対向する。　 As shown in FIG. 6, the first end plate 24 is disposed on one axial side of the rotor core 22. The radially outer edge portion of the first end plate 24 protrudes to the other side in the axial direction, and contacts the radially outer edge portion of the surface on the one axial side of the rotor core 22. The radially outer edge of the first end plate 24 overlaps with the opening on one axial side of the magnet insertion hole 22b in the axial direction, and presses the magnet 23 inserted into the magnet insertion hole 22b from one axial side. A portion radially inward from the radially outer edge portion of the first end plate 24 faces the surface on one side in the axial direction of the rotor core 22 in the axial direction through a gap 27a. *
第１エンドプレート２４は、第１エンドプレート２４の軸方向一方側の面から軸方向他方側に窪む噴出溝２４ａを有する。噴出溝２４ａは、径方向に延びる。噴出溝２４ａの径方向内側の端部は、第１エンドプレート２４を軸方向に貫通して隙間２７ａと繋がる。噴出溝２４ａの径方向外側の端部は、第１エンドプレート２４の径方向外側に開口し、後述するコイル３２と径方向に隙間を介して対向する。噴出溝２４ａの径方向内側の部分における軸方向一方側の開口は、ナット８８と第１エンドプレート２４との軸方向の間に挟まれて固定されるワッシャ８９によって閉塞される。ワッシャ８９は、径方向に拡がる円環板状である。　 The first end plate 24 has an ejection groove 24 a that is recessed from the surface on one side in the axial direction of the first end plate 24 toward the other side in the axial direction. The ejection groove 24a extends in the radial direction. The radially inner end of the ejection groove 24a penetrates the first end plate 24 in the axial direction and is connected to the gap 27a. The radially outer end of the ejection groove 24a opens to the radially outer side of the first end plate 24, and opposes a coil 32, which will be described later, with a gap in the radial direction. The opening on the one axial side in the radially inner portion of the ejection groove 24a is closed by a washer 89 that is sandwiched and fixed between the nut 88 and the first end plate 24 in the axial direction. The washer 89 has an annular plate shape that expands in the radial direction. *
第２エンドプレート２５は、ロータコア２２の軸方向他方側に配置される。第２エンドプレート２５の径方向外縁部は、軸方向一方側に突出し、ロータコア２２の軸方向他方側の面のうち径方向外縁部と接触する。第２エンドプレート２５の径方向外縁部は、マグネット挿入孔２２ｂの軸方向他方側の開口部と軸方向に重なり、マグネット挿入孔２２ｂに挿入されたマグネット２３を軸方向他方側から押さえる。これにより、マグネット挿入孔２２ｂに挿入されたマグネット２３は、軸方向の両側を第１エンドプレート２４と第２エンドプレート２５とによって押さえられる。したがって、マグネット２３がマグネット挿入孔２２ｂから抜け出ることを抑制できる。　 The second end plate 25 is disposed on the other axial side of the rotor core 22. The radially outer edge portion of the second end plate 25 projects to one side in the axial direction and contacts the radially outer edge portion of the surface on the other axial side of the rotor core 22. The radially outer edge of the second end plate 25 overlaps the opening on the other axial side of the magnet insertion hole 22b in the axial direction, and presses the magnet 23 inserted into the magnet insertion hole 22b from the other axial side. Thereby, the magnet 23 inserted into the magnet insertion hole 22b is pressed by the first end plate 24 and the second end plate 25 on both sides in the axial direction. Therefore, the magnet 23 can be prevented from coming out of the magnet insertion hole 22b. *
第２エンドプレート２５の径方向外縁部よりも径方向内側の部分は、ロータコア２２の軸方向他方側の面と軸方向に隙間２７ｂを介して対向する。第２エンドプレート２５は、第２エンドプレート２５の軸方向他方側の面から軸方向一方側に窪む噴出溝２５ａを有する。噴出溝２５ａは、径方向に延びる。噴出溝２５ａの径方向内側の端部は、第２エンドプレート２５を軸方向に貫通して隙間２７ｂと繋がる。噴出溝２５ａの径方向外側の端部は、第２エンドプレート２５の径方向外側に開口し、後述するコイル３２と径方向に隙間を介して対向する。噴出溝２５ａの径方向内側の部分における軸方向他方側の開口は、フランジ部２１ｆによって閉塞される。　 The radially inner portion of the second end plate 25 is radially opposed to the surface on the other axial side of the rotor core 22 via the gap 27b. The second end plate 25 has an ejection groove 25 a that is recessed from the surface on the other axial side of the second end plate 25 to the one axial side. The ejection groove 25a extends in the radial direction. The radially inner end of the ejection groove 25a penetrates the second end plate 25 in the axial direction and is connected to the gap 27b. The radially outer end of the ejection groove 25a opens to the radially outer side of the second end plate 25, and opposes the coil 32, which will be described later, with a gap in the radial direction. The opening on the other side in the axial direction in the radially inner portion of the ejection groove 25a is closed by the flange portion 21f. *
第１エンドプレート２４とロータコア２２と第２エンドプレート２５とは、ナット８８およびワッシャ８９とフランジ部２１ｆとによって軸方向に挟持される。ナット８８が大径部２１ａの雄ネジ部に締め込まれることで、ナット８８がワッシャ８９を介して、第１エンドプレート２４とロータコア２２と第２エンドプレート２５とをフランジ部２１ｆに押し付ける。これにより、第１エンドプレート２４とロータコア２２と第２エンドプレート２５とは、第２のシャフト２０ａに固定される。　 The first end plate 24, the rotor core 22, and the second end plate 25 are sandwiched in the axial direction by the nut 88, the washer 89, and the flange portion 21f. When the nut 88 is tightened into the male screw portion of the large diameter portion 21 a, the nut 88 presses the first end plate 24, the rotor core 22, and the second end plate 25 against the flange portion 21 f via the washer 89. Thereby, the 1st end plate 24, the rotor core 22, and the 2nd end plate 25 are fixed to the 2nd shaft 20a. *
図４に示す回転検出部８０は、第２のロータ２０の回転を検出する。本実施形態において回転検出部８０は、例えば、ＶＲ（Ｖａｒｉａｂｌｅ　Ｒｅｌｕｃｔａｎｃｅ）型レゾルバである。回転検出部８０は、内筒部１２ｃの径方向内側に配置される。回転検出部８０は、被検出部８１と、センサ部８２と、を有する。　 The rotation detector 80 shown in FIG. 4 detects the rotation of the second rotor 20. In the present embodiment, the rotation detection unit 80 is, for example, a VR (Variable Reluctance) type resolver. The rotation detector 80 is disposed on the radially inner side of the inner cylinder portion 12c. The rotation detection unit 80 includes a detected unit 81 and a sensor unit 82. *
被検出部８１は、周方向に延びる環状である。被検出部８１は、第２のシャフト２０ａに嵌め合わされて固定される。より詳細には、被検出部８１は、小径部２１ｄに嵌め合わされて固定される。被検出部８１の径方向内縁部における軸方向他方側の面は、第１中径部２１ｂと小径部２１ｄとの間の段差に接触する。被検出部８１は、取付部材５０と径方向に重なる。そのため、被検出部８１と取付部材５０とが径方向に重ならずに軸方向に離れて配置される場合に比べて、第２のシャフト２０ａを軸方向に小型化しやすい。被検出部８１は、磁性体製である。　 The detected part 81 has an annular shape extending in the circumferential direction. The detected part 81 is fitted and fixed to the second shaft 20a. More specifically, the detected portion 81 is fitted and fixed to the small diameter portion 21d. The surface on the other axial side of the radially inner edge of the detected portion 81 is in contact with the step between the first medium diameter portion 21b and the small diameter portion 21d. The detected portion 81 overlaps the mounting member 50 in the radial direction. Therefore, the second shaft 20a can be easily downsized in the axial direction as compared to the case where the detected portion 81 and the attachment member 50 are arranged in the axial direction without overlapping in the radial direction. The detected part 81 is made of a magnetic material. *
なお、本明細書において「ある対象同士が、ある方向に重なる」とは、ある方向に沿って視た場合に、ある対象同士が重なることを含む。すなわち、被検出部８１と取付部材５０とが径方向に重なるとは、径方向に沿って視た場合に、被検出部８１と取付部材５０とが重なることを含む。　 In the present specification, “some objects overlap in a certain direction” includes that certain objects overlap each other when viewed along a certain direction. That is, that the detected portion 81 and the attachment member 50 overlap in the radial direction includes the overlap of the detected portion 81 and the attachment member 50 when viewed along the radial direction. *
センサ部８２は、内蓋部１２と外蓋部１３との軸方向の間に配置される。より詳細には、センサ部８２は、内筒部１２ｃの径方向内側において、内筒底部１２ｄの軸方向一方側の面に固定される。すなわち、センサ部８２は、内蓋部１２に取り付けられる。そのため、センサ部８２を取り付けやすい。センサ部８２は、第２凹部１２ｇ内に配置される。そのため、内蓋部１２をモータ収容本体部１１に取り付けた後に、第２凹部１２ｇの軸方向一方側の開口から第２凹部１２ｇ内にセンサ部８２を挿入して配置することができる。したがって、センサ部８２を配置することが容易である。　 The sensor portion 82 is disposed between the inner lid portion 12 and the outer lid portion 13 in the axial direction. More specifically, the sensor part 82 is fixed to the surface on the one axial side of the inner cylinder bottom part 12d on the radially inner side of the inner cylinder part 12c. That is, the sensor unit 82 is attached to the inner lid unit 12. Therefore, it is easy to attach the sensor unit 82. The sensor part 82 is arrange | positioned in the 2nd recessed part 12g. Therefore, after attaching the inner lid part 12 to the motor housing main body part 11, the sensor part 82 can be inserted into the second recessed part 12g from the opening on the one axial side of the second recessed part 12g. Therefore, it is easy to arrange the sensor unit 82. *
センサ部８２は、被検出部８１の径方向外側を囲む環状である。センサ部８２は、周方向に沿って複数のコイルを有する。第２のシャフト２０ａとともに被検出部８１が回転することによって、センサ部８２のコイルには、被検出部８１の周方向位置に応じた誘起電圧が生じる。センサ部８２は、誘起電圧を検出することで、被検出部８１の回転を検出する。これにより、回転検出部８０は、第２のシャフト２０ａの回転を検出して、第２のロータ２０の回転を検出する。　 The sensor unit 82 has an annular shape that surrounds the radially outer side of the detected portion 81. The sensor unit 82 has a plurality of coils along the circumferential direction. When the detected portion 81 rotates together with the second shaft 20a, an induced voltage corresponding to the circumferential position of the detected portion 81 is generated in the coil of the sensor portion 82. The sensor unit 82 detects the rotation of the detected unit 81 by detecting the induced voltage. Thereby, the rotation detection unit 80 detects the rotation of the second rotor 20 by detecting the rotation of the second shaft 20a. *
第２のステータ３０は、第２のロータ２０と径方向に隙間を介して対向する。第２のステータ３０は、ステータコア３１と、ステータコア３１に装着される複数のコイル３２と、を有する。ステータコア３１は、第２の回転軸Ｊ２を中心とした円環状である。ステータコア３１の外周面は、本体筒部１１ｂの内周面に固定される。ステータコア３１は、ロータコア２２の径方向外側に隙間を介して対向する。　 The second stator 30 faces the second rotor 20 via a gap in the radial direction. The second stator 30 has a stator core 31 and a plurality of coils 32 attached to the stator core 31. The stator core 31 has an annular shape around the second rotation axis J2. The outer peripheral surface of the stator core 31 is fixed to the inner peripheral surface of the main body cylinder portion 11b. The stator core 31 is opposed to the outer side in the radial direction of the rotor core 22 via a gap. *
第２のポンプ部４０は、外蓋部１３の中央部に設けられる。第２のポンプ部４０は、第２のシャフト２０ａの軸方向一方側に配置される。第２のポンプ部４０は、外歯歯車４２と、内歯歯車４３と、上述したポンプ室４６と、吸入口４４と、吐出口４５と、貯留部４８と、を有する。外歯歯車４２は、第２の回転軸Ｊ２周りに回転可能な歯車である。外歯歯車４２は、第２のシャフト２０ａの軸方向一方側の端部に固定される。より詳細には、外歯歯車４２は、固定部５２の外周面に固定される。そのため、取付部材５０を介して外歯歯車４２をモータシャフト本体２１に固定できる。これにより、取付部材５０の寸法を調整することで、モータシャフト本体２１の寸法および外歯歯車４２の寸法を変えずに、外歯歯車４２をモータシャフト本体２１に固定できる。　 The second pump part 40 is provided in the center part of the outer lid part 13. The 2nd pump part 40 is arrange | positioned at the axial direction one side of the 2nd shaft 20a. The second pump unit 40 includes an external gear 42, an internal gear 43, the above-described pump chamber 46, a suction port 44, a discharge port 45, and a storage unit 48. The external gear 42 is a gear that can rotate around the second rotation axis J2. The external gear 42 is fixed to the end portion on one side in the axial direction of the second shaft 20a. More specifically, the external gear 42 is fixed to the outer peripheral surface of the fixing portion 52. Therefore, the external gear 42 can be fixed to the motor shaft main body 21 via the mounting member 50. Thereby, the external gear 42 can be fixed to the motor shaft main body 21 without changing the dimensions of the motor shaft main body 21 and the external gear 42 by adjusting the dimensions of the mounting member 50. *
外歯歯車４２は、ポンプ室４６内に収容される。図５に示すように、外歯歯車４２は、外周面に複数の歯部４２ａを有する。外歯歯車４２の歯部４２ａの歯形は、トロコイド歯形である。　 The external gear 42 is accommodated in the pump chamber 46. As shown in FIG. 5, the external gear 42 has a plurality of tooth portions 42a on the outer peripheral surface. The tooth profile of the tooth portion 42a of the external gear 42 is a trochoidal tooth profile. *
内歯歯車４３は、第２の回転軸Ｊ２に対して偏心する偏心回転軸Ｊｔ周りに回転可能な円環状の歯車である。内歯歯車４３は、ポンプ室４６内に収容される。内歯歯車４３は、外歯歯車４２の径方向外側を囲み、外歯歯車４２と噛み合う。内歯歯車４３は、内周面に複数の歯部４３ａを有する。内歯歯車４３の歯部４３ａの歯形は、トロコイド歯形である。このように、外歯歯車４２の歯部４２ａの歯形および内歯歯車４３の歯部４３ａの歯形がトロコイド歯形であるため、トロコイドポンプを構成することができる。したがって、第２のポンプ部４０から生じる騒音を低減でき、第２のポンプ部４０から吐出されるオイルＯの圧力および量を安定させやすい。　 The internal gear 43 is an annular gear that is rotatable around an eccentric rotation axis Jt that is eccentric with respect to the second rotation axis J2. The internal gear 43 is accommodated in the pump chamber 46. The internal gear 43 surrounds the radially outer side of the external gear 42 and meshes with the external gear 42. The internal gear 43 has a plurality of tooth portions 43a on the inner peripheral surface. The tooth profile of the tooth portion 43a of the internal gear 43 is a trochoidal tooth profile. Thus, since the tooth profile of the tooth portion 42a of the external gear 42 and the tooth profile of the tooth portion 43a of the internal gear 43 are trochoidal tooth profiles, a trochoid pump can be configured. Therefore, noise generated from the second pump unit 40 can be reduced, and the pressure and amount of the oil O discharged from the second pump unit 40 can be easily stabilized. *
本実施形態では、第１凹部１３ｅの軸方向一方側の開口から内歯歯車４３および外歯歯車４２を挿入した後に、栓体部１３ｂによって第１凹部１３ｅの軸方向一方側の開口を閉塞することで、ポンプ室４６を構成することができるとともに、内歯歯車４３および外歯歯車４２をポンプ室４６に
収容できる。そのため、第２のポンプ部４０の組み立てを容易にできる。　 In the present embodiment, after the internal gear 43 and the external gear 42 are inserted from the opening on the one axial side of the first recess 13e, the opening on the one axial side of the first recess 13e is closed by the plug portion 13b. Thus, the pump chamber 46 can be configured, and the internal gear 43 and the external gear 42 can be accommodated in the pump chamber 46. Therefore, the assembly of the 2nd pump part 40 can be made easy.
上述したように吸入口４４は、第２の吸い上げ油路９６と繋がる。図４に示すように、吸入口４４は、ポンプ室４６の軸方向他方側に開口する。吸入口４４は、外歯歯車４２と内歯歯車４３との隙間と繋がる。吸入口４４は、第２の吸い上げ油路９６を介してオイルＯを、ポンプ室４６内、より詳細には外歯歯車４２と内歯歯車４３との隙間内に吸入可能である。図５に示すように、吸入口４４は、貯留部４８の下側の端部よりも上側、かつ、外歯歯車４２の下側の端部よりも上側に配置される。　 As described above, the suction port 44 is connected to the second suction oil passage 96. As shown in FIG. 4, the suction port 44 opens to the other axial side of the pump chamber 46. The suction port 44 is connected to a gap between the external gear 42 and the internal gear 43. The suction port 44 can suck the oil O through the second suction oil passage 96 into the pump chamber 46, more specifically, into the gap between the external gear 42 and the internal gear 43. As shown in FIG. 5, the suction port 44 is disposed above the lower end portion of the storage portion 48 and above the lower end portion of the external gear 42. *
上述したように吐出口４５は、蓋内油路６１と繋がる。図４に示すように、吐出口４５は、ポンプ室４６の軸方向一方側に開口する。吐出口４５は、外歯歯車４２と内歯歯車４３との隙間と繋がる。吐出口４５は、ポンプ室４６内、より詳細には外歯歯車４２と内歯歯車４３との隙間内からオイルＯを吐出可能である。　 As described above, the discharge port 45 is connected to the in-lid oil passage 61. As shown in FIG. 4, the discharge port 45 opens on one axial side of the pump chamber 46. The discharge port 45 is connected to a gap between the external gear 42 and the internal gear 43. The discharge port 45 can discharge the oil O from the inside of the pump chamber 46, more specifically, from the gap between the external gear 42 and the internal gear 43. *
貯留部４８は、ポンプ室４６の鉛直方向下側領域の軸方向一方側においてポンプ室４６と繋がる。図５に示すように、軸方向視において貯留部４８の形状は、下側に凸となる弓形状である。貯留部４８には、吸入口４４からポンプ室４６内に吸入されたオイルＯの一部が流入する。　 The reservoir 48 is connected to the pump chamber 46 on one axial side of the lower region in the vertical direction of the pump chamber 46. As shown in FIG. 5, the shape of the storage portion 48 in the axial direction is a bow shape that protrudes downward. Part of the oil O sucked into the pump chamber 46 from the suction port 44 flows into the storage portion 48. *
吸入口４４は、貯留部４８の下側の端部よりも上側に配置されるため、第２のポンプ部４０が停止しても、貯留部４８に流入したオイルＯの少なくとも一部は、吸入口４４からモータ収容部１４内に戻らずに、貯留部４８内に貯留される。これにより、第２のポンプ部４０が停止している際に、ポンプ室４６内の外歯歯車４２の下側の部分および内歯歯車４３の下側の部分を貯留部４８内のオイルＯと接触した状態にすることができる。したがって、第２のポンプ部４０を再度駆動した際に、外歯歯車４２の歯部４２ａと内歯歯車４３の歯部４３ａとの間、およびポンプ室４６の内周面と内歯歯車４３の外周面との間にオイルＯを介在させることができ、焼き付きが生じることを抑制できる。　 Since the suction port 44 is disposed above the lower end of the storage part 48, even if the second pump part 40 stops, at least part of the oil O that has flowed into the storage part 48 is suctioned. It is stored in the storage part 48 without returning from the mouth 44 into the motor housing part 14. Thus, when the second pump unit 40 is stopped, the lower part of the external gear 42 and the lower part of the internal gear 43 in the pump chamber 46 are replaced with the oil O in the storage unit 48. It can be in contact. Therefore, when the second pump portion 40 is driven again, the space between the tooth portion 42 a of the external gear 42 and the tooth portion 43 a of the internal gear 43, and the inner peripheral surface of the pump chamber 46 and the internal gear 43. Oil O can be interposed between the outer peripheral surface and the occurrence of seizure. *
第２のロータ２０が回転して第２のシャフト２０ａが回転すると、第２のシャフト２０ａに固定された外歯歯車４２が回転する。これにより、外歯歯車４２と噛み合う内歯歯車４３が回転して、吸入口４４からポンプ室４６内に吸入されるオイルＯが、外歯歯車４２と内歯歯車４３との間を介して、吐出口４５へと送られる。このようにして、第２のポンプ部４０は、第２のシャフト２０ａを介して駆動される。吐出口４５から吐出されたオイルＯは、蓋内油路６１に流入し、接続口６１ａから第２のシャフト内油路９７Ａへと流入する。図６に矢印で示すように、第２のシャフト内油路９７Ａに流入したオイルＯは、回転する第２のシャフト２０ａの遠心力によって、径方向外側に力を受け、第１貫通孔２６ａ～２６ｄ（すなわち、第２の径方向油路９７Ｂ）を通って第２のシャフト２０ａの外部へと流出する。　 When the second rotor 20 rotates and the second shaft 20a rotates, the external gear 42 fixed to the second shaft 20a rotates. As a result, the internal gear 43 that meshes with the external gear 42 rotates, and the oil O sucked into the pump chamber 46 from the suction port 44 passes between the external gear 42 and the internal gear 43. It is sent to the discharge port 45. In this way, the second pump unit 40 is driven via the second shaft 20a. The oil O discharged from the discharge port 45 flows into the in-lid oil passage 61 and then flows into the second shaft oil passage 97A from the connection port 61a. As indicated by an arrow in FIG. 6, the oil O that has flowed into the second shaft oil passage 97A receives a force radially outward due to the centrifugal force of the rotating second shaft 20a, and the first through holes 26a to 26a. It flows out of the second shaft 20a through 26d (that is, the second radial oil passage 97B). *
本実施形態では、第１貫通孔２６ａは第１エンドプレート２４とロータコア２２との軸方向の隙間２７ａに開口するため、第１貫通孔２６ａから流出したオイルＯは隙間２７ａに流入する。そして、隙間２７ａに流入したオイルＯは、噴出溝２４ａから径方向外側に向けて噴出される。本実施形態では、噴出溝２４ａの径方向内側の部分における軸方向一方側の開口がワッシャ８９によって閉塞されるため、噴出溝２４ａ内に流入したオイルＯをワッシャ８９によって径方向外側に向けて案内しやすい。　 In the present embodiment, since the first through hole 26a opens in the axial gap 27a between the first end plate 24 and the rotor core 22, the oil O flowing out of the first through hole 26a flows into the gap 27a. And the oil O which flowed into the clearance gap 27a is ejected toward the radial direction outer side from the ejection groove 24a. In the present embodiment, the opening on the one axial side in the radially inner portion of the ejection groove 24 a is closed by the washer 89, so that the oil O that has flowed into the ejection groove 24 a is guided radially outward by the washer 89. It's easy to do. *
第１貫通孔２６ｂは第２エンドプレート２５とロータコア２２との軸方向の隙間２７ｂに開口するため、第１貫通孔２６ｂから流出したオイルＯは隙間２７ｂに流入する。そして、隙間２７ｂに流入したオイルＯは、噴出溝２５ａから径方向外側に向けて噴出される。本実施形態では、噴出溝２５ａの径方向内側の部分における軸方向他方側の開口がフランジ部２１ｆによって閉塞されるため、噴出溝２５ａ内に流入したオイルＯをフランジ部２１ｆによって径方向外側に向けて案内しやすい。　 Since the first through hole 26b opens in the axial gap 27b between the second end plate 25 and the rotor core 22, the oil O flowing out of the first through hole 26b flows into the gap 27b. And the oil O which flowed into the clearance gap 27b is ejected toward the radial direction outer side from the ejection groove 25a. In the present embodiment, the opening on the other axial side in the radially inner portion of the ejection groove 25a is closed by the flange portion 21f, so the oil O that has flowed into the ejection groove 25a is directed radially outward by the flange portion 21f. Easy to guide. *
噴出溝２４ａ，２５ａから径方向外側に噴出されたオイルＯは、コイル３２に吹き付けられる。これにより、オイルＯによってコイル３２を冷却することができる。本実施形態では、第２のシャフト内油路９７Ａは、第２のシャフト２０ａの内部に設けられるため、噴出溝２４ａ，２５ａから噴出されるまでのオイルＯによって、第２のロータ２０を冷却することもできる。このように、本実施形態において吐出口４５から吐出されるオイルＯは、第２のロータ２０と第２のステータ３０とに導かれる。　 Oil O ejected radially outward from the ejection grooves 24 a and 25 a is sprayed to the coil 32. Thereby, the coil 32 can be cooled by the oil O. In this embodiment, since the second shaft oil passage 97A is provided inside the second shaft 20a, the second rotor 20 is cooled by the oil O until it is ejected from the ejection grooves 24a and 25a. You can also. As described above, the oil O discharged from the discharge port 45 in the present embodiment is guided to the second rotor 20 and the second stator 30. *
第１貫通孔２６ｃはベアリング保持部１２ｅの径方向内側に開口するため、第１貫通孔２６ｃから流出したオイルＯはベアリング７０に供給される。第１貫通孔２６ｄはベアリング保持部１１ｃの径方向内側に開口するため、第１貫通孔２６ｄから流出したオイルＯはベアリング７１に供給される。これにより、オイルＯをベアリング７０，７１の潤滑剤として利用できる。　 Since the first through hole 26c opens to the inside of the bearing holding portion 12e in the radial direction, the oil O flowing out of the first through hole 26c is supplied to the bearing 70. Since the first through hole 26d opens to the inside of the bearing holding portion 11c in the radial direction, the oil O flowing out of the first through hole 26d is supplied to the bearing 71. Thereby, the oil O can be used as a lubricant for the bearings 70 and 71. *
なお、図６では、噴出溝２４ａ，２５ａからオイルＯが上側に噴出される例を示すが、これに限られない。第２のロータ２０は回転するため、噴出溝２４ａ，２５ａの周方向位置は、第２のロータ２０の回転に伴って変化する。これにより、噴出溝２４ａ，２５ａから噴出されるオイルＯの向きは、周方向に変化し、周方向に沿って配置される複数のコイル３２をオイルＯによって冷却することができる。　 Although FIG. 6 shows an example in which the oil O is ejected upward from the ejection grooves 24a and 25a, the present invention is not limited to this. Since the second rotor 20 rotates, the circumferential positions of the ejection grooves 24 a and 25 a change with the rotation of the second rotor 20. Thereby, the direction of the oil O ejected from the ejection grooves 24a and 25a changes in the circumferential direction, and the plurality of coils 32 arranged along the circumferential direction can be cooled by the oil O. *
以上のようにして、第２のシャフト２０ａの回転によって第２のポンプ部４０を駆動することができ、第２のポンプ部４０によってハウジング１０に貯留されるオイルＯを吸い上げて第２のロータ２０、第２のステータ３０およびベアリング７０，７１に供給することができる。これにより、ハウジング１０に貯留されるオイルＯを利用して、第２のロータ２０および第２のステータ３０を冷却することができるとともに、ベアリング７０，７１とモータシャフト本体２１との間の潤滑性を向上できる。　 As described above, the second pump unit 40 can be driven by the rotation of the second shaft 20a, and the second rotor 20 is configured to suck up the oil O stored in the housing 10 by the second pump unit 40. The second stator 30 and the bearings 70 and 71 can be supplied. Accordingly, the second rotor 20 and the second stator 30 can be cooled using the oil O stored in the housing 10, and the lubricity between the bearings 70 and 71 and the motor shaft main body 21 can be improved. Can be improved. *
本実施形態によれば、蓋内油路６１および第２のシャフト内油路９７Ａが設けられることで、吐出口４５から吐出されたオイルＯを第２のシャフト２０ａの内部に送ることができる。また、第１貫通孔２６ａ～２６ｄが設けられるため、第２のシャフト内油路９７Ａ内に流入したオイルＯを第２のステータ３０およびベアリング７０，７１に供給することができる。　 According to the present embodiment, the oil O discharged from the discharge port 45 can be sent to the inside of the second shaft 20a by providing the in-lid oil passage 61 and the second shaft oil passage 97A. Further, since the first through holes 26a to 26d are provided, the oil O that has flowed into the second shaft oil passage 97A can be supplied to the second stator 30 and the bearings 70 and 71. *
また、本実施形態によれば、第２のシャフト２０ａ内に設けられた第２のシャフト内油路９７Ａは、第２のシャフト２０ａの軸方向一方側の端部において、吐出口４５と繋がる蓋内油路６１に開口する。第２のシャフト２０ａの軸方向一方側の端部には、外歯歯車４２が固定されるため、第２のシャフト２０ａの軸方向一方側の端部は、吐出口４５と比較的近い位置に配置される。したがって、吐出口４５と第２のシャフト内油路９７Ａとを繋ぐ蓋内油路６１の長さを短くできる。　 Further, according to the present embodiment, the second in-shaft oil passage 97 </ b> A provided in the second shaft 20 a is a lid that is connected to the discharge port 45 at the end on the one axial side of the second shaft 20 a. Open to the inner oil passage 61. Since the external gear 42 is fixed to the end portion on the one axial side of the second shaft 20a, the end portion on the one axial side of the second shaft 20a is relatively close to the discharge port 45. Be placed. Therefore, the length of the in-lid oil passage 61 that connects the discharge port 45 and the second in-shaft oil passage 97A can be shortened. *
また、本実施形態によれば、取付部材５０の径方向内側面が第２のシャフト内油路９７Ａの径方向内側面の一部を構成する。そのため、取付部材５０に外歯歯車４２を固定しつつ、取付部材５０から第２のシャフト内油路９７Ａ内にオイルＯを流入させることができる。これにより、上述したように、モータシャフト本体２１の寸法および外歯歯車４２の寸法を変えずに、取付部材５０を介してモータシャフト本体２１と外歯歯車４２とを固定できるとともに、第２のシャフト内油路９７Ａを蓋内油路６１に開口させやすい。　 Further, according to the present embodiment, the radially inner side surface of the attachment member 50 constitutes a part of the radially inner side surface of the second shaft oil passage 97A. Therefore, the oil O can be caused to flow from the mounting member 50 into the second shaft oil passage 97 </ b> A while fixing the external gear 42 to the mounting member 50. Thus, as described above, the motor shaft main body 21 and the external gear 42 can be fixed via the mounting member 50 without changing the dimensions of the motor shaft main body 21 and the external gear 42, and the second It is easy to open the oil passage 97A in the shaft to the oil passage 61 in the lid. *
本発明は上述の実施形態に限られず、他の構成を採用することもできる。外歯歯車４２は、取付部材５０を介さずにモータシャフト本体２１に直接的に固定されてもよい。この場合、第２のシャフト内油路９７Ａは、例えば、モータシャフト本体２１の内部にのみ設けられてもよい。また、取付部材５０は、モータシャフト本体２１の外周面に固定されてもよい。　 The present invention is not limited to the above-described embodiment, and other configurations can be employed. The external gear 42 may be directly fixed to the motor shaft main body 21 without using the attachment member 50. In this case, the second in-shaft oil passage 97 </ b> A may be provided only inside the motor shaft main body 21, for example. Further, the attachment member 50 may be fixed to the outer peripheral surface of the motor shaft main body 21. *
また、取付部材５０は、軸方向の全体に亘って外径が均一な部材であってもよい。すなわち、嵌合部５１の外径と固定部５２の外径とは、互いに同じであってもよい。この場合、例えば固定部５２の外径を図４に示す嵌合部５１の外径と同じにして小さくすると、固定部５２の固定される外歯歯車４２の外径を小さくすることが可能である。これにより、内歯歯車４３の外径を小さくすることができ、ポンプ室４６の内径を小さくできる。したがって、ポンプ室４６が設けられた突出部１３ｄの外径を小さくでき、突出部１３ｄの径方向外側面と第２凹部１２ｇの内周面との径方向の間を大きくできる。そのため、突出部１３ｄの径方向外側面と第２凹部１２ｇの内周面との径方向の間に、例えば、センサ部８２のうち軸方向一方側に突出する部分を配置することが可能となり、よりセンサ部８２を外蓋部１３に近づけることができる。これにより、モータ２全体を軸方向に小型化しやすい。なお、センサ部８２のうち軸方向一方側に突出する部分とは、例えば、センサ部８２が有するコイルである。　 Further, the attachment member 50 may be a member having a uniform outer diameter over the entire axial direction. That is, the outer diameter of the fitting part 51 and the outer diameter of the fixing part 52 may be the same. In this case, for example, if the outer diameter of the fixing portion 52 is made the same as the outer diameter of the fitting portion 51 shown in FIG. 4, the outer diameter of the external gear 42 to which the fixing portion 52 is fixed can be reduced. is there. Thereby, the outer diameter of the internal gear 43 can be reduced, and the inner diameter of the pump chamber 46 can be reduced. Therefore, the outer diameter of the protrusion 13d provided with the pump chamber 46 can be reduced, and the distance between the radial outer surface of the protrusion 13d and the inner peripheral surface of the second recess 12g can be increased. Therefore, for example, it is possible to arrange a portion of the sensor portion 82 that protrudes on one side in the axial direction between the radial outer surface of the protruding portion 13d and the inner peripheral surface of the second recess 12g. Thus, the sensor unit 82 can be brought closer to the outer lid unit 13. Thereby, it is easy to miniaturize the entire motor 2 in the axial direction. In addition, the part which protrudes in the axial direction one side among the sensor parts 82 is a coil which the sensor part 82 has, for example. *
また、取付部材５０は、２つ以上の部材によって構成されてもよい。この場合、取付部材５０は、穴部２１ｇ内に嵌め合わされる第１筒状部材と、第１筒状部材に嵌め合わされてモータシャフト本体２１よりも軸方向一方側に延びる第２筒状部材と、を有してもよい。この場合、第２筒状部材の軸方向一方側の端部に外歯歯車４２が固定される。　 Moreover, the attachment member 50 may be comprised by two or more members. In this case, the attachment member 50 includes a first tubular member fitted into the hole portion 21g, and a second tubular member fitted to the first tubular member and extending to one side in the axial direction from the motor shaft main body 21. You may have. In this case, the external gear 42 is fixed to the end portion on the one axial side of the second cylindrical member. *
また、上述した実施形態では、取付部材５０のうち第２貫通孔１３ｆに通される部分は、固定部５２よりも外径が小さい嵌合部５１である。そのため、第２貫通孔１３ｆの内径を固定部５２の外径よりも小さくして、取付部材５０の外周面と第２貫通孔１３ｆの内周面との径方向の隙間を比較的小さくする構成を採用することもできる。これにより、ポンプ室４６内のオイルＯが第２貫通孔１３ｆを介して漏れることを抑制できる。なお、この構成を採用する場合、組立者は、外蓋部１３を内蓋部１２に取り付けた後に、第１凹部１３ｅの左側の開口から嵌合部５１を第２貫通孔１３ｆに挿し込み、モータシャフト本体２１の穴部２１ｇに嵌め合わせることで、取付部材５０をモータシャフト本体２１に固定する。　 In the above-described embodiment, the portion of the attachment member 50 that is passed through the second through hole 13 f is the fitting portion 51 having an outer diameter smaller than that of the fixing portion 52. For this reason, the inner diameter of the second through hole 13f is made smaller than the outer diameter of the fixed portion 52, and the radial gap between the outer peripheral surface of the mounting member 50 and the inner peripheral surface of the second through hole 13f is made relatively small. Can also be adopted. Thereby, it can suppress that the oil O in the pump chamber 46 leaks through the 2nd through-hole 13f. When this configuration is adopted, the assembler inserts the fitting portion 51 into the second through hole 13f from the left opening of the first recess 13e after attaching the outer lid portion 13 to the inner lid portion 12, The mounting member 50 is fixed to the motor shaft main body 21 by being fitted into the hole 21 g of the motor shaft main body 21. *
また、第２貫通孔１３ｆを小さくできれば、ポンプ室４６の軸方向他方側の開口を閉塞する閉塞部の径方向内端部をより径方向内側に配置できる。本実施形態においてポンプ室４６の軸方向他方側の開口を閉塞する閉塞部とは、突出部１３ｄのうち第２貫通孔１３ｆの径方向外側の部分である。閉塞部の径方向内端部をより径方向内側に配置できることで、外歯歯車４２の外径および内歯歯車４３の外径をより小さくしても、閉塞部によってポンプ室４６の軸方向他方側の開口を好適に閉塞できる。そのため、ポンプ室４６の内径を小さくできる。したがって、上述したのと同様に、突出部１３ｄの径方向外側面と第２凹部１２ｇの内周面との径方向の間にセンサ部８２の一部を配置することができ、結果としてモータ２を軸方向に小型化しやすい。　 Further, if the second through hole 13f can be made smaller, the radially inner end portion of the closing portion that closes the opening on the other axial side of the pump chamber 46 can be disposed more radially inward. In the present embodiment, the closing portion that closes the opening on the other axial side of the pump chamber 46 is a portion on the radially outer side of the second through hole 13f in the protruding portion 13d. Since the radially inner end of the closed portion can be arranged more radially inward, the other axial direction of the pump chamber 46 can be reduced by the closed portion even if the outer diameter of the external gear 42 and the outer diameter of the internal gear 43 are made smaller. The side opening can be suitably closed. Therefore, the inner diameter of the pump chamber 46 can be reduced. Therefore, in the same manner as described above, a part of the sensor portion 82 can be disposed between the radial outer surface of the protruding portion 13d and the inner peripheral surface of the second recess 12g. As a result, the motor 2 It is easy to reduce the size in the axial direction. *
以上に、本発明の実施形態および変形例を説明したが、実施形態および変形例における各構成およびそれらの組み合わせなどは一例であり、本発明の趣旨から逸脱しない範囲内で、構成の付加、省略、置換およびその他の変更が可能である。また、本発明は実施形態によって限定されることはない。 Although the embodiments and modifications of the present invention have been described above, the configurations and combinations thereof in the embodiments and modifications are examples, and additions and omissions of configurations are within the scope that does not depart from the spirit of the present invention. , Substitutions and other changes are possible. Further, the present invention is not limited by the embodiment.
２…モータ、３…発電機、４…伝達機構、５…クーラー、５ａ…設置面、８…モータユニット、９…エンジン、１０…ハウジング、１８ａ…オイル導入口、１８Ａ…第１の隔壁（隔壁）、１９…収容部、１９Ａ…モータ室、１９Ｂ…発電機室、２０…第２のロータ、２０ａ…第２のシャフト、３０…第２のステータ、４０…第２のポンプ部、４５，３４５…吐出口、９０…油路、９１…第１の油路、９２…第１の吸い上げ油路、９３Ａ…第１のシャフト内油路、９３Ｂ…第１の径方向油路、９４…モータ供給油路、９５…第２の油路、９６…第２の吸い上げ油路、９７Ａ…第２のシャフト内油路、９７Ｂ…第２の径方向油路、３２０…第１のロータ、３２０ａ…第１のシャフト、３３０…第１のステータ、３４０
…第１のポンプ部、Ｊ１…第１の回転軸、Ｊ２…第２の回転軸、Ｏ…オイル DESCRIPTION OF SYMBOLS 2 ... Motor, 3 ... Generator, 4 ... Transmission mechanism, 5 ... Cooler, 5a ... Installation surface, 8 ... Motor unit, 9 ... Engine, 10 ... Housing, 18a ... Oil inlet, 18A ... 1st partition (partition wall 19 ... accommodating part, 19A ... motor room, 19B ... generator room, 20 ... second rotor, 20a ... second shaft, 30 ... second stator, 40 ... second pump part, 45,345 ... Discharge port, 90 ... oil passage, 91 ... first oil passage, 92 ... first suction oil passage, 93A ... first shaft oil passage, 93B ... first radial oil passage, 94 ... motor supply Oil passage, 95 ... second oil passage, 96 ... second suction oil passage, 97A ... second shaft oil passage, 97B ... second radial oil passage, 320 ... first rotor, 320a ... first 1 shaft, 330 ... first stator, 340
... 1st pump part, J1 ... 1st rotating shaft, J2 ... 2nd rotating shaft, O ... Oil

Claims (7)

  1. エンジンに接続されるモータユニットであって、



    　前記エンジンの動力により第１の回転軸周りを回転する第１のシャフトを有する発電機と、



    　第２の回転軸周りを回転する第２のシャフトを有するモータと、



    　前記エンジン、前記発電機および前記モータの間で力を伝達し、前記エンジンおよび前記モータの動力を外部に出力する伝達機構と、



    　前記発電機および前記モータを収容する収容部を有するハウジングと、



    　前記収容部の下部領域に溜るオイルと、



    　前記収容部の内部に位置し前記第１のシャフトの回転により駆動される第１のポンプ部と、



    を備え、



    　前記発電機は、前記第１のシャフトを有する第１のロータと、前記第１の回転軸の径方向外側から前記第１のロータを囲む第１のステータと、を有し、



    　前記モータは、前記第２のシャフトを有する第２のロータと、前記第２の回転軸の径方向外側から前記第２のロータを囲む第２のステータと、を有し、



    　前記収容部には、前記オイルを循環させる油路が設けられ、



    　前記油路の経路中には、前記油路を通過する前記オイルを冷却するクーラーが設けられ、



    　前記油路は、第１の油路を含み、



    　前記第１の油路は、



    　　前記収容部の下部領域から前記第１のポンプ部に繋がる第１の吸い上げ油路と、



    　　前記第１のポンプ部の吐出口に繋がり前記第１の回転軸に沿って前記第１のシャフトの内部を延びる第１のシャフト内油路と、



    　　前記第１のシャフト内油路から径方向外側に延びて前記第１のステータにオイルを供給する第１の径方向油路と、



    　　前記第１のポンプ部の吐出口から前記モータに向かって延びて前記モータにオイルを供給するモータ供給油路と、を有する、



    モータユニット。     A motor unit connected to the engine,



    A generator having a first shaft that rotates about a first rotation axis by the power of the engine;



    A motor having a second shaft that rotates about a second axis of rotation;



    A transmission mechanism for transmitting force between the engine, the generator and the motor, and outputting the power of the engine and the motor to the outside;



    A housing having a housing for housing the generator and the motor;



    Oil that accumulates in a lower region of the housing portion;



    A first pump unit located inside the housing unit and driven by rotation of the first shaft;



    With



    The generator includes a first rotor having the first shaft, and a first stator surrounding the first rotor from a radially outer side of the first rotating shaft,



    The motor has a second rotor having the second shaft, and a second stator surrounding the second rotor from a radially outer side of the second rotating shaft,



    The accommodating portion is provided with an oil passage for circulating the oil,



    In the path of the oil path, a cooler for cooling the oil passing through the oil path is provided,



    The oil passage includes a first oil passage,



    The first oil passage is



    A first siphoning oil passage leading from the lower region of the housing part to the first pump part;



    A first in-shaft oil passage that is connected to the discharge port of the first pump section and extends inside the first shaft along the first rotation axis;



    A first radial oil passage that extends radially outward from the first shaft oil passage and supplies oil to the first stator;



    A motor supply oil passage that extends from the discharge port of the first pump portion toward the motor and supplies oil to the motor.



    Motor unit.
  2. 前記モータ供給油路は、前記モータの上側から前記モータに、前記オイルを供給する、



    請求項１に記載のモータユニット。     The motor supply oil path supplies the oil to the motor from above the motor.



    The motor unit according to claim 1.
  3. 前記クーラーは、前記第１の吸い上げ油路の経路中に設けられる、



    請求項１又は２に記載のモータユニット。     The cooler is provided in a path of the first suction oil passage;



    The motor unit according to claim 1.
  4. 前記クーラーは、設置面において前記ハウジングの外周面と接触して固定され、



    　前記設置面は、前記ハウジングの壁部を介して前記発電機と対向する、



    請求項１～３の何れか一項に記載のモータユニット。     The cooler is fixed in contact with the outer peripheral surface of the housing on the installation surface,



    The installation surface is opposed to the generator through a wall portion of the housing.



    The motor unit according to any one of claims 1 to 3.
  5. 前記収容部の内部に位置し前記第２のシャフトの回転により駆動される第２のポンプ部を備え、



    　前記油路は、第２の油路を含み、



    　前記第２の油路は、



    　　前記収容部の下部領域から前記第２のポンプ部に繋がる第２の吸い上げ油路と、



    　　前記第２のポンプ部の吐出口に繋がり前記第２の回転軸に沿って前記第２のシャフトの内部を延びる第２のシャフト内油路と、



    　　前記第２のシャフト内油路から径方向外側に延びて前記第２のステータにオイルを供給する第２の径方向油路と、を有する、



    請求項１～４の何れか一項に記載のモータユニット。     A second pump unit located inside the housing unit and driven by rotation of the second shaft;



    The oil passage includes a second oil passage,



    The second oil passage is



    A second suction oil passage that leads from the lower region of the housing part to the second pump part;



    A second oil passage in the shaft that is connected to the discharge port of the second pump section and extends inside the second shaft along the second rotation axis;



    A second radial oil passage that extends radially outward from the second shaft oil passage and supplies oil to the second stator.



    The motor unit according to any one of claims 1 to 4.
  6. 前記モータは、前記発電機の上側に位置し、



    　前記モータから滴下したオイルは、前記発電機に供給される、



    請求項１～５の何れか一項に記載のモータユニット。     The motor is located above the generator;



    Oil dripped from the motor is supplied to the generator,



    The motor unit according to any one of claims 1 to 5.
  7. 前記ハウジングには、前記収容部を、前記モータが収容されるモータ室と、前記発電機が収容される発電機室と、に区画する隔壁が設けられ、



    　前記隔壁には、上下方向に貫通するオイル導入口が設けられ、



    　前記オイル導入口は、前記発電機の直上で開口する、



    請求項６に記載のモータユニット。     The housing is provided with a partition wall that divides the housing portion into a motor chamber in which the motor is accommodated and a generator chamber in which the generator is accommodated,



    The partition wall is provided with an oil introduction port penetrating vertically.



    The oil inlet opens just above the generator;



    The motor unit according to claim 6.
PCT/JP2019/013357 2018-03-30 2019-03-27 Motor unit WO2019189460A1 (en)

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WO2024042799A1 (en) * 2022-08-25 2024-02-29 ニデック株式会社 Pump-equipped motor, and drive device

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WO2024042798A1 (en) * 2022-08-25 2024-02-29 ニデック株式会社 Pump-equipped motor and drive device
WO2024042799A1 (en) * 2022-08-25 2024-02-29 ニデック株式会社 Pump-equipped motor, and drive device

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