WO2019065240A1 - Drive device - Google Patents

Drive device Download PDF

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Publication number
WO2019065240A1
WO2019065240A1 PCT/JP2018/033792 JP2018033792W WO2019065240A1 WO 2019065240 A1 WO2019065240 A1 WO 2019065240A1 JP 2018033792 W JP2018033792 W JP 2018033792W WO 2019065240 A1 WO2019065240 A1 WO 2019065240A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
motor shaft
clutch
external gear
rotation
Prior art date
Application number
PCT/JP2018/033792
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 CN201890001111.6U priority Critical patent/CN212392766U/en
Publication of WO2019065240A1 publication Critical patent/WO2019065240A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/108—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction clutches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to a drive device.
  • the above-described rotating electrical machine may be provided with a pump unit that sucks up the oil stored in the case.
  • the rotor and the stator can be cooled by sucking up the oil by the pump unit and supplying the oil to the rotor and the stator, for example.
  • the pump unit is driven using the rotation of the rotating electrical machine. Therefore, when the rotational speed of the rotating electrical machine changes, the pump unit may not be driven stably.
  • the amount of oil supplied by the pump unit decreases.
  • the pump unit can not be driven and oil can not be supplied by the pump unit. As described above, depending on the rotation state of the rotating electrical machine, the supply of oil by the pump unit may be insufficient.
  • the present invention has an object to provide a drive device that includes a pump unit driven via a motor shaft and can stably drive the pump unit regardless of the rotational state of the motor shaft. Do.
  • a rotor having a motor shaft disposed along a central axis extending in one direction, a stator radially opposed to the rotor via a gap, the rotor and the stator And a pump unit driven by the motor shaft to deliver the oil stored in the storage unit to at least one of the rotor and the stator; It has a first clutch that switches connection and disconnection between a motor shaft and the pump unit, and a pump drive unit having a pump drive shaft and capable of driving the pump unit via the pump drive shaft.
  • a drive device includes a pump unit driven via a motor shaft, and can stably drive the pump unit regardless of the rotational state of the motor shaft.
  • FIG. 1 is a view schematically showing a schematic configuration of the drive device of the first embodiment.
  • FIG. 2 is a view schematically showing a schematic configuration of a drive device according to a second embodiment.
  • the Z-axis direction shown in each drawing is the vertical direction Z with the positive side as the upper side and the negative side as the lower side.
  • 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”.
  • the drive device 1 of the present embodiment includes a housing 20 and a rotor 20 having a motor shaft 21 disposed along a central axis J1 extending in one direction, and a stator 30. , A pump unit 40, a pump drive unit 50, a first clutch 71, and a second clutch 72.
  • the central axis J1 extends in the left-right direction in FIG. That is, in the present embodiment, the left and right direction in FIG. 1 corresponds to one direction.
  • a direction parallel to the axial direction of the central axis J1 is simply referred to as "axial direction”
  • a radial direction centered on the central axis J1 is simply referred to as “radial direction”
  • the central axis J1 is centered
  • the circumferential direction is referred to as “first circumferential direction ⁇ 1”.
  • the left side of FIG. 1 in the axial direction is referred to as “one side in the axial direction”
  • the right side of FIG. 1 in the axial direction is referred to as the “other side in the axial direction”.
  • the direction advancing clockwise is the positive direction of the first circumferential direction ⁇ 1
  • the direction advancing counterclockwise is The negative direction of one circumferential direction ⁇ 1 is taken.
  • the positive direction of the first circumferential direction ⁇ 1 corresponds to one direction around the central axis extending in one direction.
  • the negative direction of the first circumferential direction ⁇ 1 corresponds to the other direction around the central axis extending in one direction.
  • the housing 10 has a housing 11.
  • the housing portion 11 accommodates the rotor 20 and the stator 30 and can store oil O.
  • the oil O is stored in the vertically lower region in the housing portion 11.
  • the “vertically lower region inside the housing portion” includes a portion located below the center of the vertical direction Z inside the housing portion.
  • the housing 10 has an opening 12 which opens in a vertically lower area in the housing 11.
  • the liquid surface OS of the oil O stored in the storage unit 11 in the present embodiment is located above the opening 12.
  • the opening 12 opens into the oil O stored in the storage unit 11.
  • the fluid level OS of the oil O fluctuates as the pump portion 40 sucks up the oil O, but is disposed below the rotor 20 at least when the rotor 20 rotates. Thereby, when the rotor 20 rotates, it can suppress that oil O becomes rotation resistance of the rotor 20. As shown in FIG.
  • the housing 10 has a first oil passage 61 and an intake oil passage 63.
  • One end of the first oil passage 61 is connected to a discharge port 45 of a pump chamber 43 described later.
  • the other end of the first oil passage 61 is connected to a second oil passage 62 described later. That is, the first oil passage 61 connects the discharge port 45 and the second oil passage 62.
  • One end of the suction oil passage 63 is connected to the vertically lower region in the housing 11 through the opening 12.
  • the other end of the suction oil passage 63 is connected to the suction port 44 of the pump chamber 43. That is, the suction oil passage 63 connects the lower region in the vertical direction in the housing portion 11 and the suction port 44.
  • the rotor 20 has a motor shaft 21, an annular rotor core 22 fixed to the outer peripheral surface of the motor shaft 21, and a magnet (not shown) fixed to the rotor core 22.
  • the motor shaft 21 has a second oil passage 62 provided inside the motor shaft 21.
  • the second oil passage 62 is a bottomed hole extending from the end of the motor shaft 21 on one side in the axial direction to the other side in the axial direction.
  • the second oil passage 62 opens in one axial direction.
  • the cross-sectional shape orthogonal to the axial direction in the second oil passage 62 is, for example, a circular shape centered on the central axis J1.
  • the second oil passage 62 is connected to the first oil passage 61. In FIG. 1, the second oil passage 62 opens to the first oil passage 61 at an end on one side in the axial direction of the motor shaft 21.
  • the motor shaft 21 has through holes 21 a and 21 b connecting the second oil passage 62 and the outer peripheral surface of the motor shaft 21.
  • the through holes 21a and 21b extend in the radial direction.
  • the through hole 21 a is disposed on one side in the axial direction of the rotor core 22.
  • the through hole 21 b is disposed on the other side in the axial direction with respect to the rotor core 22.
  • the through holes 21 a and 21 b are connected to the inside of the housing portion 11. For example, a plurality of through holes 21a and 21b are provided along the circumferential direction.
  • the stator 30 faces the rotor 20 in the radial direction via a gap.
  • the stator 30 has a stator core 31 and a plurality of coils 32 mounted on the stator core 31.
  • the stator core 31 has an annular shape centered on the central axis J1.
  • the stator core 31 faces the radially outer side of the rotor core 22 via a gap.
  • the pump portion 40 is disposed on one side in the axial direction of the motor shaft 21.
  • the pump unit 40 has a first external gear 41, a second external gear 42, a pump chamber 43, an inlet 44, and an outlet 45.
  • the first external gear 41 has a plurality of teeth on the outer peripheral surface.
  • the tooth shape of the tooth portion of the first external gear 41 is, for example, a trochoidal tooth shape.
  • the first external gear 41 is rotatably disposed around the central axis J1.
  • the first external gear 41 is attached to the motor shaft 21 via the first clutch 71.
  • the rotation of the motor shaft 21 is transmitted to the first external gear 41 via the first clutch 71.
  • the first external gear 41 corresponds to a first rotating portion.
  • the second external gear 42 has a plurality of teeth on the outer peripheral surface.
  • the tooth shape of the tooth portion of the second external gear 42 is, for example, a trochoidal tooth shape.
  • the second external gear 42 meshes with the first external gear 41.
  • the second external gear 42 is rotatably disposed around the rotation axis J2.
  • the rotation axis J2 is parallel to the central axis J1, and is located, for example, below the central axis J1.
  • the axial position of the second external gear 42 is the same as the axial position of the first external gear 41.
  • the second external gear 42 is attached to the pump drive shaft 51 of the pump drive unit 50 via the second clutch 72.
  • the rotation of the pump drive unit 50 is transmitted to the second external gear 42 through the second clutch 72.
  • the rotational direction of the second external gear 42 is opposite to the rotational direction of the first external gear 41.
  • the second external gear 42 corresponds to a second rotating portion.
  • the circumferential direction around the rotation axis J2 is referred to as "second circumferential direction ⁇ 2".
  • the direction advancing counterclockwise is the positive direction of the second circumferential direction ⁇ 2
  • the direction advancing clockwise is the second circumference
  • the negative direction of the direction ⁇ 2 is taken.
  • the positive direction of the second circumferential direction ⁇ 2 about the rotation axis J2 is opposite to the positive direction of the first circumferential direction ⁇ 1 about the central axis J1.
  • the positive direction of the second circumferential direction ⁇ 2 corresponds to one direction around the rotation axis of the pump drive shaft.
  • the negative direction of the second circumferential direction ⁇ 2 corresponds to the other direction around the rotation axis of the pump drive shaft.
  • the pump chamber 43 is provided in the housing 10.
  • the pump chamber 43 accommodates the first external gear 41 and the second external gear 42.
  • the suction port 44 is connected to the suction oil passage 63.
  • the suction port 44 is disposed between the first external gear 41 and the second external gear 42 in the vertical direction Z.
  • the suction port 44 opens to one side of the pump chamber 43 in the depth direction orthogonal to both the axial direction and the vertical direction Z, for example.
  • the suction port 44 can suck the oil O stored in the storage unit 11 into the pump chamber 43 via the suction oil passage 63.
  • the discharge port 45 is connected to the first oil passage 61.
  • the discharge port 45 is disposed between the first external gear 41 and the second external gear 42 in the vertical direction Z.
  • the discharge port 45 opens to the other side of the pump chamber 43 in the depth direction orthogonal to both the axial direction and the vertical direction Z, for example. That is, the suction port 44 and the discharge port 45 are disposed on opposite sides of the pump chamber 43 in the depth direction.
  • the discharge port 45 can discharge the oil O from the inside of the pump chamber 43 to the first oil passage 61.
  • the pump unit 40 feeds the oil O by the rotation of the first external gear 41 and the second external gear 42 engaged with each other.
  • the pump drive unit 50 is disposed on one side in the axial direction of the pump unit 40.
  • the pump drive unit 50 is attached to the housing 10.
  • the pump drive unit 50 is a motor having a pump drive shaft 51.
  • the pump drive shaft 51 is, for example, disposed along the rotation axis J2 and extends in the axial direction.
  • the pump drive unit 50 can drive the pump unit 40 via the pump drive shaft 51.
  • the first clutch 71 switches connection and disconnection between the motor shaft 21 and the pump unit 40. More specifically, the first clutch 71 switches between connection and disconnection of the motor shaft 21 and the first external gear 41.
  • the first clutch 71 is a one-way clutch.
  • the first clutch 71 connects the motor shaft 21 and the first external gear 41 when the motor shaft 21 tries to rotate relative to the first external gear 41 in the positive direction of the first circumferential direction ⁇ 1. Do.
  • the rotation of the motor shaft 21 is transmitted to the first external gear 41, and the first external gear 41 rotates with the motor shaft 21 in the positive direction of the first circumferential direction ⁇ 1.
  • the first clutch 71 and the first external gear 41 Disconnect from Thus, the rotation of the motor shaft 21 is not transmitted to the first external gear 41, and the motor shaft 21 rotates relative to the first external gear 41 in the negative direction of the first circumferential direction ⁇ 1. That is, the motor shaft 21 and the first external gear 41 idle on each other.
  • the first clutch 71 prevents relative rotation in the positive direction and causes relative rotation in the negative direction. Tolerate.
  • the first clutch 71 has an inner ring and an outer ring surrounding the inner ring.
  • the inner ring of the first clutch 71 is fitted and fixed to an end of the motor shaft 21 on one side in the axial direction.
  • the first external gear 41 is fitted and fixed to the outer peripheral surface of the outer ring of the first clutch 71.
  • the inner ring of the first clutch 71 and the outer ring of the first clutch 71 are connected to each other when the inner ring tries to rotate relative to the outer ring in the positive direction of the first circumferential direction ⁇ 1.
  • the connection between the inner ring of the first clutch 71 and the outer ring of the first clutch 71 is disconnected when the inner ring tries to rotate relative to the outer ring in the negative direction of the first circumferential direction ⁇ 1.
  • the inner ring of the first clutch 71 rotates with the motor shaft 21. Therefore, as the inner ring and the outer ring in the first clutch 71 are connected and disconnected in this manner, the rotation transmission to the first external gear 41 according to the rotation direction of the motor shaft 21 as described above. The presence or absence of is switched.
  • the second clutch 72 switches between connection and disconnection of the pump drive shaft 51 and the pump unit 40. More specifically, the second clutch 72 switches between connection and disconnection of the pump drive shaft 51 and the second external gear 42.
  • the second clutch 72 is a one-way clutch.
  • the second clutch 72 is configured to move the pump drive shaft 51 and the second external gear 42 together. Connect
  • the rotation of the pump drive shaft 51 is transmitted to the second external gear 42, and the second external gear 42 rotates with the pump drive shaft 51 in the positive direction of the second circumferential direction ⁇ 2.
  • the pump drive shaft 51 when the pump drive shaft 51 is to rotate relative to the second external gear 42 in the negative direction of the second circumferential direction ⁇ 2 with respect to the second clutch 72, the pump drive shaft 51 and the second external gear Disconnect the connection with 42.
  • the rotation of the pump drive shaft 51 is not transmitted to the second external gear 42, and the pump drive shaft 51 rotates relative to the second external gear 42 in the negative direction of the second circumferential direction ⁇ 2. That is, the pump drive shaft 51 and the second external gear 42 idle on each other.
  • the second clutch 72 prevents the relative rotation in the positive direction, and the relative rotation in the negative direction. Allow
  • the second clutch 72 has an inner ring and an outer ring surrounding the inner ring, like the first clutch 71.
  • the inner ring of the second clutch 72 is fitted and fixed to the other end of the pump drive shaft 51 in the axial direction.
  • the second external gear 42 is fitted and fixed to the outer peripheral surface of the outer ring of the second clutch 72.
  • the inner ring of the second clutch 72 and the outer ring of the second clutch 72 are connected to each other when the inner ring is to rotate relative to the outer ring in the positive direction of the second circumferential direction ⁇ 2.
  • connection between the inner ring of the second clutch 72 and the outer ring of the second clutch 72 is disconnected when the inner ring is to rotate relative to the outer ring in the negative direction of the second circumferential direction ⁇ 2.
  • the inner ring of the second clutch 72 rotates with the pump drive shaft 51. Therefore, as the inner ring and the outer ring in the second clutch 72 are connected and disconnected in this manner, rotation to the second external gear 42 according to the rotation direction of the pump drive shaft 51 as described above. The presence or absence of transmission can be switched.
  • the first clutch 71 and the second clutch 72 are not particularly limited as long as they are one-way clutches that allow transmission of rotation in one direction as described above and block transmission of rotation in the other direction.
  • the first clutch 71 and the second clutch 72 may be, for example, a sprag type one way clutch or a cam type one way clutch.
  • the oil O that has flowed out of the through holes 21 a and 21 b is sprayed to the coil 32. Thereby, the coil 32 can be cooled by the oil O.
  • the rotor 20 since the second oil passage 62 is provided inside the motor shaft 21, the rotor 20 can also be cooled by the oil O until it flows out from the through holes 21a and 21b. Thus, the oil O discharged from the discharge port 45 in the present embodiment is led to the rotor 20 and the stator 30.
  • the circumferential position of the through holes 21 a and 21 b changes as the rotor 20 rotates.
  • the direction of the oil O flowing out of the through holes 21a and 21b changes in the first circumferential direction ⁇ 1, and the plurality of coils 32 disposed along the first circumferential direction ⁇ 1 can be cooled by the oil O. .
  • the pump unit 40 can be driven by the rotation of the motor shaft 21, and the oil O stored in the housing 10 can be sucked up by the pump unit 40 and supplied to the rotor 20 and the stator 30. That is, the pump unit 40 sends the oil O stored in the storage unit 11 to both the rotor 20 and the stator 30. Thereby, the rotor 20 and the stator 30 can be cooled by utilizing the oil O stored in the housing 10.
  • the oil O supplied to the stator 30 falls in the housing portion 11 and is stored again in the vertically lower region in the housing portion 11. Thereby, the oil O in the accommodating part 11 can be circulated.
  • the pump drive shaft 51 rotates in the positive direction of the second circumferential direction ⁇ 2
  • the rotation of the pump drive shaft 51 is transmitted to the second external gear 42 via the second clutch 72
  • the second external gear 42 Rotates in the positive direction of the second circumferential direction ⁇ 2.
  • the first external gear 41 engaged with the second external gear 42 rotates in the positive direction of the first circumferential direction ⁇ 1, and is drawn into the pump chamber 43 from the suction oil passage 63 via the suction port 44.
  • Oil O is sent to the discharge port 45 via the space between the first external gear 41 and the second external gear 42.
  • the pump unit 40 is driven via the pump drive shaft 51.
  • the oil O sent to the discharge port 45 is supplied to the rotor 20 and the stator 30 in the same manner as when the pump unit 40 is driven by the motor shaft 21.
  • the pump drive unit 50 can drive the pump unit 40.
  • the pump drive unit 50 can drive the pump unit 40 as described above. Therefore, even when the rotational speed of the motor shaft 21 is relatively low, the pump 40 can be driven at a required rotational speed by driving the pump 40 by the pump drive unit 50. Thus, even when the rotational speed of the motor shaft 21 is relatively low, the amount of oil O supplied by the pump unit 40 can be maintained.
  • the first clutch 71 that switches between connection and disconnection of the motor shaft 21 and the pump unit 40 is provided. Therefore, when driving the pump unit 40 by the pump drive unit 50, the motor shaft 21 and the pump unit 40 are disconnected to rotate the pump unit 40, that is, the rotation of the first external gear 41 as the motor shaft 21. Can be blocked from being transmitted to Therefore, it is easy to maintain the rotation of the motor shaft 21 at a desired rotational speed.
  • the drive device 1 includes the pump unit 40 driven via the motor shaft 21 and can stably drive the pump unit 40 regardless of the rotational state of the motor shaft 21. can get. Therefore, the amount of oil O supplied can be maintained regardless of the rotational state of the motor shaft 21.
  • the first clutch 71 is in the disconnected state, a load for rotating the pump unit 40 is not applied to the motor shaft 21 when the pump drive unit 50 drives the pump unit 40. Therefore, the load for rotating the motor shaft 21 can be reduced.
  • the first clutch 71 is a one-way clutch. Therefore, the state of the first clutch 71 can be automatically switched between connection and disconnection according to the direction in which the motor shaft 21 rotates with respect to the pump unit 40, which is simple.
  • the first clutch 71 prevents relative rotation in the positive direction and relative rotation in the negative direction. Tolerate. Therefore, when the motor shaft 21 is to rotate relative to the first external gear 41 in the positive direction of the first circumferential direction ⁇ 1, the first external gear 41 can be rotated by the motor shaft 21.
  • the rotational speed of the motor shaft 21 is relatively low, for example, the rotational speed of the first external gear 41 rotated by the pump drive unit 50 is larger than the rotational speed of the motor shaft 21. Therefore, the motor shaft 21 rotates in the negative direction of the first circumferential direction ⁇ 1 relatively to the first external gear 41. As a result, the connection between the motor shaft 21 and the first external gear 41 is disconnected, and relative rotation of the motor shaft 21 with respect to the first external gear 41 is permitted. Therefore, it is possible to prevent the rotation of the motor shaft 21 from being impeded by the first external gear 41 rotated by the pump drive unit 50.
  • the second clutch 72 that switches between connection and disconnection of the pump drive shaft 51 and the pump unit 40 is provided. Therefore, by disconnecting the connection between the pump drive shaft 51 and the pump unit 40 when the pump unit 40 is driven by the motor shaft 21, transmission of the rotation of the pump unit 40 to the pump drive shaft 51 can be prevented. . Therefore, a load for rotating the pump drive shaft 51 is not applied to the motor shaft 21, and an increase in load when the pump portion 40 is driven by the motor shaft 21 can be suppressed. Moreover, it can suppress that an excess back electromotive force arises in the pump drive part 50. FIG.
  • the second clutch 72 is a one-way clutch. Therefore, the state of the second clutch 72 can be automatically switched between connection and disconnection according to the direction in which the pump drive shaft 51 rotates with respect to the pump unit 40, which is simple.
  • the second clutch 72 prevents relative rotation in the positive direction, and relative rotation in the negative direction. Allow Therefore, when the pump drive shaft 51 is to rotate relative to the second external gear 42 in the positive direction of the second circumferential direction ⁇ 2, the pump drive shaft 51 may rotate the second external gear 42. it can.
  • the pump drive shaft 51 rotates in the negative direction of the second circumferential direction ⁇ 2 relatively to the second external gear 42.
  • the connection between the pump drive shaft 51 and the second external gear 42 is disconnected, and relative rotation of the pump drive shaft 51 with respect to the second external gear 42 is permitted. Therefore, even if the pump unit 40 is driven by the motor shaft 21, the pump drive shaft 51 can be prevented from rotating.
  • the pump unit 40 has the first external gear 41 and the second external gear 42.
  • the rotation of the motor shaft 21 is transmitted to the first external gear 41, and the rotation of the pump drive shaft 51 is transmitted to the second external gear 42. That is, the motor shaft 21 and the pump drive shaft 51 are connected to different external gears and connected to the pump unit 40. Therefore, as compared with the case where the motor shaft 21 and the pump drive shaft 51 are connected to the same external gear, the arrangement freedom of the pump drive unit 50 can be improved.
  • the arrangement freedom of the pump drive part 50 can be improved, the arrangement freedom of the first oil passage 61 and the suction oil passage 63 provided in the housing 10 can also be improved.
  • the oil O discharged from the discharge port 45 can be sent to the inside of the motor shaft 21 by providing the first oil passage 61 and the second oil passage 62. Further, since the through holes 21a and 21b are provided, the oil O flowing into the second oil passage 62 can be supplied to the stator 30 through the through holes 21a and 21b.
  • the oil O is preferably coiled if the supply amount of the oil O from the pump unit 40 is not large. Hard to spray on 32
  • the pump unit 40 can be stably driven, and the supply amount of the oil O can be maintained.
  • 21b, oil O can be suitably sprayed onto the coil 32.
  • the pump unit 140 has a third external gear 141 and an internal gear 142.
  • the third external gear 141 has a plurality of teeth on the outer peripheral surface.
  • the tooth shape of the tooth portion of the third external gear 141 is, for example, a trochoidal tooth shape.
  • the third external gear 141 is disposed rotatably around the central axis J1. The rotation of the motor shaft 21 is transmitted to the third external gear 141 via the first clutch 171.
  • the third external gear 141 corresponds to a first rotating portion and a second rotating portion.
  • the internal gear 142 is an annular gear rotatable around an axis eccentric to the central axis J1.
  • the internal gear 142 surrounds the radially outer side of the third external gear 141 and meshes with the third external gear 141.
  • the internal gear 142 has a plurality of teeth on its inner circumferential surface.
  • the tooth profile of the teeth of the internal gear 142 is a trochoid tooth profile.
  • the pump chamber 143 accommodates the third external gear 141 and the internal gear 142.
  • the suction port 144 opens to the other axial side of the pump chamber 143.
  • the discharge port 145 opens on one side in the axial direction of the pump chamber 143.
  • the suction port 144 and the discharge port 145 are respectively connected to the gap between the third external gear 141 and the internal gear 142.
  • the rotation of the pump drive shaft 151 of the pump drive unit 150 is transmitted to the third external gear 141 via the second clutch 172. That is, in the present embodiment, the rotation of the motor shaft 21 and the rotation of the pump drive shaft 151 are transmitted to the same external gear.
  • the pump drive shaft 151 is disposed, for example, along the central axis J1 on one side in the axial direction of the pump portion 140. That is, in the present embodiment, the rotation axis of the pump drive shaft 151 is the central axis J1.
  • the first clutch 171 switches between connection and disconnection of the motor shaft 21 and the third external gear 141.
  • the first clutch 171 is a centrifugal clutch.
  • the first clutch 171 connects the motor shaft 21 and the third external gear 141 when the rotational speed of the motor shaft 21 is equal to or higher than a predetermined speed.
  • the first clutch 171 disconnects the connection between the motor shaft 21 and the third external gear 141 when the rotational speed of the motor shaft 21 is smaller than a predetermined speed.
  • the second clutch 172 switches connection and disconnection between the pump drive shaft 151 of the pump drive unit 150 and the third external gear 141.
  • the second clutch 172 is a one-way clutch as in the first embodiment.
  • the second clutch 172 is configured to move the pump drive shaft 151 and the third external gear 141 together.
  • the pump drive shaft 151 tries to rotate relative to the third external gear 141 in the negative direction of the first circumferential direction ⁇ 1 with respect to the third clutch 172
  • the pump drive shaft 151 and the third external gear Disconnect the connection with 141. That is, of the relative rotation around the rotation axis of the pump drive shaft 151 with respect to the third external gear 141, the second clutch 172 prevents relative rotation in one direction and allows relative rotation in the other direction.
  • one direction around the rotation axis of the pump drive shaft 151 is a positive direction in the first circumferential direction ⁇ 1.
  • the other direction around the rotation axis of the pump drive shaft 151 is the negative direction of the first circumferential direction ⁇ 1.
  • the first clutch 171 is provided, and since the pump drive unit 150 can drive the pump unit 140, the pump unit is not dependent on the rotational state of the motor shaft 21.
  • a driving device 2 capable of stably driving 140 is obtained.
  • the first clutch 171 is a centrifugal clutch. Therefore, according to the rotational speed of the motor shaft 21, the state of the first clutch 171 can be automatically switched between connection and disconnection, which is simple.
  • the first clutch 171 connects the motor shaft 21 and the pump portion 140 when the rotational speed of the motor shaft 21 is equal to or higher than a predetermined speed, and the rotational speed of the motor shaft 21 is smaller than the predetermined speed. , And disconnect the connection between the motor shaft 21 and the pump unit 140. Therefore, when the rotational speed of the motor shaft 21 is relatively low, the first clutch 171 is in a disconnected state. Thus, by driving the pump unit 140 by the pump drive unit 150 in this state, the pump unit 140 is maintained while maintaining the supply amount of oil O even when the rotational speed of the motor shaft 21 is relatively low. Rotation of the motor shaft 21 can be prevented from being hindered.
  • the motor shaft 21 rotates in the negative direction of the first circumferential direction ⁇ 1
  • the first clutch 171 is in the disconnected state. Therefore, by driving the pump unit 140 by the pump drive unit 150 in this state, even if the motor shaft 21 is reversely rotated, the motor shaft is maintained by the rotation of the pump unit 140 while maintaining the supply amount of the oil O. It is possible to prevent the rotation of 21 from being inhibited.
  • the reverse rotation of the motor shaft 21 refers to the case where the vehicle reverses.
  • the rotational speed of the motor shaft 21 is relatively low. Therefore, even if the first clutch 171 is a centrifugal clutch, the switching of the first clutch 171 can be suitably performed according to the rotation state of the motor shaft 21.
  • the pump portion 140 has the third external gear 141 and the internal gear 142 surrounding the radially outer side of the third external gear 141. Therefore, the entire pump portion 140 can be easily miniaturized as compared with a configuration in which two external gears are engaged. Therefore, the drive device 2 can be easily miniaturized.
  • the present invention is not limited to the above-described embodiment, and other configurations can be adopted.
  • the first clutch is not particularly limited as long as connection and disconnection of the motor shaft and the pump unit can be switched.
  • the second clutch is not particularly limited as long as connection and disconnection between the pump drive shaft and the pump portion can be switched.
  • the first clutch and the second clutch may be, for example, an electromagnetic clutch. Also, the second clutch may not be provided.
  • the first clutch When the first clutch is a centrifugal clutch as in the second embodiment, the first clutch connects the motor shaft and the pump portion when the rotational speed of the motor shaft is smaller than a predetermined speed, and the motor The motor shaft and the pump unit may be disconnected when the rotational speed of the shaft is equal to or higher than a predetermined speed.
  • the connection between the motor shaft and the pump unit can be disconnected, and the pump unit can be suppressed from being driven at high speed.
  • cavitation is likely to occur when the volume of the pump portion is relatively large.
  • cavitation can be suppressed, and the capacity of the pump unit can be easily increased.
  • the pump unit may send the oil O stored in the storage unit to at least one of the rotor and the stator. That is, the pump unit may be configured to feed the oil O to only one of the rotor and the stator.
  • the configuration of the pump unit is not particularly limited as long as the oil O stored in the storage unit can be supplied to at least one of the rotor and the stator.
  • the tooth profile of the teeth of each external gear and the tooth profile of the teeth of the internal gear may be cycloid or involute.
  • the application of the drive device of embodiment mentioned above is not specifically limited.
  • the drive device of the embodiment described above is mounted on, for example, a vehicle.
  • each structure mentioned above can be combined suitably in the range which does not contradiction mutually.

Abstract

One embodiment of the drive device of the present invention is provided with: a rotor having a motor shaft disposed along a center axis extending in one direction; a stator radially facing the rotor with a gap therebetween; a housing having a holding section for holding the rotor and the stator and capable of holding oil; a pump section driven by the motor shaft and delivering the oil held in the holding section to at least one of the rotor and the stator; a first clutch for connecting or disconnecting the motor shaft and the pump section; and a pump drive section having a pump drive shaft and capable of driving the pump section through the pump drive shaft.

Description

駆動装置Drive unit
　本発明は、駆動装置に関する。 The present invention relates to a drive device.
　ステータおよびロータ等の潤滑および冷却のための潤滑用流体を貯留するケースを備える回転電機が知られる。例えば、日本国公開公報特開２０１３－０５５７２８号公報では、車両に搭載される回転電機が記載される。 There is known an electric rotating machine provided with a case for storing a lubricating fluid for lubricating and cooling such as a stator and a rotor. For example, in Japanese Patent Laid-Open Publication No. 2013-055728, a rotary electric machine mounted on a vehicle is described.
日本国公開公報特開２０１３－０５５７２８号公報Japanese Published Patent Application Publication No. 2013-055728
　上記のような回転電機には、ケースに貯留されるオイルを吸い上げるポンプ部が設けられる場合がある。ポンプ部によってオイルを吸い上げて、例えばロータおよびステータにオイルを供給することで、ロータおよびステータを冷却することができる。この場合、例えば、ポンプ部は回転電機の回転を利用して駆動される。そのため、回転電機の回転速度が変化すると、ポンプ部を安定して駆動することができない場合があった。 The above-described rotating electrical machine may be provided with a pump unit that sucks up the oil stored in the case. The rotor and the stator can be cooled by sucking up the oil by the pump unit and supplying the oil to the rotor and the stator, for example. In this case, for example, the pump unit is driven using the rotation of the rotating electrical machine. Therefore, when the rotational speed of the rotating electrical machine changes, the pump unit may not be driven stably.
　具体的には、例えば、回転電機の回転速度が比較的低速の場合には、ポンプ部によるオイルの供給量が低下する。また、回転電機が逆回転する場合においては、ポンプの種類によっては、ポンプ部を駆動させることができず、ポンプ部によってオイルを供給できない。以上のように、回転電機の回転状態によっては、ポンプ部によるオイルの供給が不十分となる場合があった。 Specifically, for example, when the rotational speed of the rotating electrical machine is relatively low, the amount of oil supplied by the pump unit decreases. In addition, when the rotary electric machine rotates in the reverse direction, depending on the type of pump, the pump unit can not be driven and oil can not be supplied by the pump unit. As described above, depending on the rotation state of the rotating electrical machine, the supply of oil by the pump unit may be insufficient.
　本発明は、上記事情に鑑みて、モータシャフトを介して駆動されるポンプ部を備え、モータシャフトの回転状態によらずポンプ部を安定して駆動できる駆動装置を提供することを目的の一つとする。 In view of the above-described circumstances, the present invention has an object to provide a drive device that includes a pump unit driven via a motor shaft and can stably drive the pump unit regardless of the rotational state of the motor shaft. Do.
　本発明の駆動装置の一つの態様は、一方向に延びる中心軸に沿って配置されるモータシャフトを有するロータと、前記ロータと径方向に隙間を介して対向するステータと、前記ロータおよび前記ステータを収容するとともにオイルを貯留可能な収容部を有するハウジングと、前記モータシャフトを介して駆動され、前記収容部に貯留されたオイルを前記ロータと前記ステータとの少なくとも一方に送るポンプ部と、前記モータシャフトと前記ポンプ部との接続および切断を切り換える第１クラッチと、ポンプ駆動シャフトを有し、前記ポンプ駆動シャフトを介して前記ポンプ部を駆動可能なポンプ駆動部と、を備える。 According to one aspect of the drive device of the present invention, there is provided a rotor having a motor shaft disposed along a central axis extending in one direction, a stator radially opposed to the rotor via a gap, the rotor and the stator And a pump unit driven by the motor shaft to deliver the oil stored in the storage unit to at least one of the rotor and the stator; It has a first clutch that switches connection and disconnection between a motor shaft and the pump unit, and a pump drive unit having a pump drive shaft and capable of driving the pump unit via the pump drive shaft.
　本発明の一つの態様によれば、モータシャフトを介して駆動されるポンプ部を備え、モータシャフトの回転状態によらずポンプ部を安定して駆動できる駆動装置が提供される。 According to one aspect of the present invention, a drive device is provided that includes a pump unit driven via a motor shaft, and can stably drive the pump unit regardless of the rotational state of the motor shaft.
図１は、第１実施形態の駆動装置の概略構成を模式的に示す図である。FIG. 1 is a view schematically showing a schematic configuration of the drive device of the first embodiment. 図２は、第２実施形態の駆動装置の概略構成を模式的に示す図である。FIG. 2 is a view schematically showing a schematic configuration of a drive device according to a second embodiment.
　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。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。 The Z-axis direction shown in each drawing is the vertical direction Z with the positive side as the upper side and the negative side as the lower side. 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".
＜第１実施形態＞　図１に示すように、本実施形態の駆動装置１は、ハウジング１０と、一方向に延びる中心軸Ｊ１に沿って配置されるモータシャフト２１を有するロータ２０と、ステータ３０と、ポンプ部４０と、ポンプ駆動部５０と、第１クラッチ７１と、第２クラッチ７２と、を備える。 First Embodiment As shown in FIG. 1, the drive device 1 of the present embodiment includes a housing 20 and a rotor 20 having a motor shaft 21 disposed along a central axis J1 extending in one direction, and a stator 30. , A pump unit 40, a pump drive unit 50, a first clutch 71, and a second clutch 72.
　中心軸Ｊ１は、図１の左右方向に延びる。すなわち、本実施形態においては、図１の左右方向が一方向に相当する。以下の説明においては、中心軸Ｊ１の軸方向と平行な方向を単に「軸方向」と呼び、中心軸Ｊ１を中心とする径方向を単に「径方向」と呼び、中心軸Ｊ１を中心とする周方向を「第１周方向θ１」と呼ぶ。また、軸方向のうち図１の左側を、「軸方向一方側」と呼び、軸方向のうち図１の右側を、「軸方向他方側」と呼ぶ。 The central axis J1 extends in the left-right direction in FIG. That is, in the present embodiment, the left and right direction in FIG. 1 corresponds to one direction. In the following description, a direction parallel to the axial direction of the central axis J1 is simply referred to as "axial direction", a radial direction centered on the central axis J1 is simply referred to as "radial direction", and the central axis J1 is centered The circumferential direction is referred to as “first circumferential direction θ1”. Further, the left side of FIG. 1 in the axial direction is referred to as “one side in the axial direction”, and the right side of FIG. 1 in the axial direction is referred to as the “other side in the axial direction”.
　また、第１周方向θ１のうち、軸方向他方側から軸方向一方側に向かって視て、時計回りに進む向きを第１周方向θ１の正の向きとし、反時計回りに進む向きを第１周方向θ１の負の向きとする。本実施形態において第１周方向θ１の正の向きは、一方向に延びる中心軸周りの一方の向きに相当する。第１周方向θ１の負の向きは、一方向に延びる中心軸周りの他方の向きに相当する。 Further, in the first circumferential direction θ1, when viewed from the other side in the axial direction toward the one side in the axial direction, the direction advancing clockwise is the positive direction of the first circumferential direction θ1, and the direction advancing counterclockwise is The negative direction of one circumferential direction θ1 is taken. In the present embodiment, the positive direction of the first circumferential direction θ1 corresponds to one direction around the central axis extending in one direction. The negative direction of the first circumferential direction θ1 corresponds to the other direction around the central axis extending in one direction.
　ハウジング１０は、収容部１１を有する。収容部１１は、ロータ２０およびステータ３０を収容するとともにオイルＯを貯留可能である。オイルＯは、収容部１１の内部における鉛直方向下側領域に貯留される。本明細書において「収容部の内部における鉛直方向下側領域」とは、収容部の内部における鉛直方向Ｚの中心よりも下側に位置する部分を含む。 The housing 10 has a housing 11. The housing portion 11 accommodates the rotor 20 and the stator 30 and can store oil O. The oil O is stored in the vertically lower region in the housing portion 11. In the present specification, the “vertically lower region inside the housing portion” includes a portion located below the center of the vertical direction Z inside the housing portion.
　ハウジング１０は、収容部１１の内部における鉛直方向下側領域に開口する開口部１２を有する。本実施形態において収容部１１に貯留されるオイルＯの液面ＯＳは、開口部１２よりも上側に位置する。これにより、開口部１２は、収容部１１に貯留されるオイルＯ内に開口する。オイルＯの液面ＯＳは、ポンプ部４０によってオイルＯが吸い上げられることで変動するが、少なくともロータ２０の回転時においてロータ２０よりも下側に配置される。これにより、ロータ２０が回転する際に、オイルＯがロータ２０の回転抵抗となることを抑制できる。 The housing 10 has an opening 12 which opens in a vertically lower area in the housing 11. The liquid surface OS of the oil O stored in the storage unit 11 in the present embodiment is located above the opening 12. Thus, the opening 12 opens into the oil O stored in the storage unit 11. The fluid level OS of the oil O fluctuates as the pump portion 40 sucks up the oil O, but is disposed below the rotor 20 at least when the rotor 20 rotates. Thereby, when the rotor 20 rotates, it can suppress that oil O becomes rotation resistance of the rotor 20. As shown in FIG.
　ハウジング１０は、第１油路６１と、吸入油路６３と、を有する。第１油路６１の一端は、後述するポンプ室４３の吐出口４５と繋がる。第１油路６１の他端は、後述する第２油路６２と繋がる。すなわち、第１油路６１は、吐出口４５と第２油路６２とを繋ぐ。吸入油路６３の一端は、開口部１２を介して収容部１１の内部における鉛直方向下側領域と繋がる。吸入油路６３の他端は、ポンプ室４３の吸入口４４と繋がる。すなわち、吸入油路６３は、収容部１１の内部における鉛直方向下側領域と吸入口４４とを繋ぐ。 The housing 10 has a first oil passage 61 and an intake oil passage 63. One end of the first oil passage 61 is connected to a discharge port 45 of a pump chamber 43 described later. The other end of the first oil passage 61 is connected to a second oil passage 62 described later. That is, the first oil passage 61 connects the discharge port 45 and the second oil passage 62. One end of the suction oil passage 63 is connected to the vertically lower region in the housing 11 through the opening 12. The other end of the suction oil passage 63 is connected to the suction port 44 of the pump chamber 43. That is, the suction oil passage 63 connects the lower region in the vertical direction in the housing portion 11 and the suction port 44.
　ロータ２０は、モータシャフト２１と、モータシャフト２１の外周面に固定される円環状のロータコア２２と、ロータコア２２に固定される図示しないマグネットと、を有する。モータシャフト２１は、モータシャフト２１の内部に設けられる第２油路６２を有する。第２油路６２は、モータシャフト２１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油路６２は、軸方向一方側に開口する。第２油路６２における軸方向と直交する断面形状は、例えば、中心軸Ｊ１を中心とする円形状である。第２油路６２は、第１油路６１と繋がる。図１では、第２油路６２は、モータシャフト２１の軸方向一方側の端部において第１油路６１に開口する。 The rotor 20 has a motor shaft 21, an annular rotor core 22 fixed to the outer peripheral surface of the motor shaft 21, and a magnet (not shown) fixed to the rotor core 22. The motor shaft 21 has a second oil passage 62 provided inside the motor shaft 21. The second oil passage 62 is a bottomed hole extending from the end of the motor shaft 21 on one side in the axial direction to the other side in the axial direction. The second oil passage 62 opens in one axial direction. The cross-sectional shape orthogonal to the axial direction in the second oil passage 62 is, for example, a circular shape centered on the central axis J1. The second oil passage 62 is connected to the first oil passage 61. In FIG. 1, the second oil passage 62 opens to the first oil passage 61 at an end on one side in the axial direction of the motor shaft 21.
　モータシャフト２１は、第２油路６２とモータシャフト２１の外周面とを繋ぐ貫通孔２１ａ，２１ｂを有する。貫通孔２１ａ，２１ｂは、径方向に延びる。貫通孔２１ａは、ロータコア２２よりも軸方向一方側に配置される。貫通孔２１ｂは、ロータコア２２よりも軸方向他方側に配置される。貫通孔２１ａ，２１ｂは、収容部１１の内部に繋がる。貫通孔２１ａ，２１ｂは、例えば、それぞれ周方向に沿って複数設けられる。 The motor shaft 21 has through holes 21 a and 21 b connecting the second oil passage 62 and the outer peripheral surface of the motor shaft 21. The through holes 21a and 21b extend in the radial direction. The through hole 21 a is disposed on one side in the axial direction of the rotor core 22. The through hole 21 b is disposed on the other side in the axial direction with respect to the rotor core 22. The through holes 21 a and 21 b are connected to the inside of the housing portion 11. For example, a plurality of through holes 21a and 21b are provided along the circumferential direction.
　ステータ３０は、ロータ２０と径方向に隙間を介して対向する。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、中心軸Ｊ１を中心とした円環状である。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 stator 30 faces the rotor 20 in the radial direction via a gap. The stator 30 has a stator core 31 and a plurality of coils 32 mounted on the stator core 31. The stator core 31 has an annular shape centered on the central axis J1. The stator core 31 faces the radially outer side of the rotor core 22 via a gap.
　ポンプ部４０は、モータシャフト２１の軸方向一方側に配置される。ポンプ部４０は、第１外歯歯車４１と、第２外歯歯車４２と、ポンプ室４３と、吸入口４４と、吐出口４５と、を有する。第１外歯歯車４１は、外周面に複数の歯部を有する。第１外歯歯車４１の歯部の歯形は、例えば、トロコイド歯形である。第１外歯歯車４１は、中心軸Ｊ１周りに回転可能に配置される。第１外歯歯車４１は、第１クラッチ７１を介してモータシャフト２１に取り付けられる。第１外歯歯車４１には、モータシャフト２１の回転が第１クラッチ７１を介して伝達される。本実施形態において第１外歯歯車４１は、第１回転部に相当する。 The pump portion 40 is disposed on one side in the axial direction of the motor shaft 21. The pump unit 40 has a first external gear 41, a second external gear 42, a pump chamber 43, an inlet 44, and an outlet 45. The first external gear 41 has a plurality of teeth on the outer peripheral surface. The tooth shape of the tooth portion of the first external gear 41 is, for example, a trochoidal tooth shape. The first external gear 41 is rotatably disposed around the central axis J1. The first external gear 41 is attached to the motor shaft 21 via the first clutch 71. The rotation of the motor shaft 21 is transmitted to the first external gear 41 via the first clutch 71. In the present embodiment, the first external gear 41 corresponds to a first rotating portion.
　第２外歯歯車４２は、外周面に複数の歯部を有する。第２外歯歯車４２の歯部の歯形は、例えば、トロコイド歯形である。第２外歯歯車４２は、第１外歯歯車４１と噛み合う。第２外歯歯車４２は、回転軸Ｊ２周りに回転可能に配置される。回転軸Ｊ２は、中心軸Ｊ１と平行であり、例えば、中心軸Ｊ１よりも下側に位置する。第２外歯歯車４２の軸方向位置は、第１外歯歯車４１の軸方向位置と同じである。第２外歯歯車４２は、第２クラッチ７２を介してポンプ駆動部５０のポンプ駆動シャフト５１に取り付けられる。これにより、第２外歯歯車４２には、ポンプ駆動部５０の回転が第２クラッチ７２を介して伝達される。軸方向に沿って視て、第２外歯歯車４２の回転する向きは、第１外歯歯車４１の回転する向きと逆向きである。本実施形態において第２外歯歯車４２は、第２回転部に相当する。 The second external gear 42 has a plurality of teeth on the outer peripheral surface. The tooth shape of the tooth portion of the second external gear 42 is, for example, a trochoidal tooth shape. The second external gear 42 meshes with the first external gear 41. The second external gear 42 is rotatably disposed around the rotation axis J2. The rotation axis J2 is parallel to the central axis J1, and is located, for example, below the central axis J1. The axial position of the second external gear 42 is the same as the axial position of the first external gear 41. The second external gear 42 is attached to the pump drive shaft 51 of the pump drive unit 50 via the second clutch 72. Thus, the rotation of the pump drive unit 50 is transmitted to the second external gear 42 through the second clutch 72. As viewed along the axial direction, the rotational direction of the second external gear 42 is opposite to the rotational direction of the first external gear 41. In the present embodiment, the second external gear 42 corresponds to a second rotating portion.
　なお、以下の説明においては、回転軸Ｊ２を中心とする周方向を「第２周方向θ２」と呼ぶ。第２周方向θ２のうち、軸方向他方側から軸方向一方側に向かって視て、反時計回りに進む向きを第２周方向θ２の正の向きとし、時計回りに進む向きを第２周方向θ２の負の向きとする。回転軸Ｊ２を中心とした第２周方向θ２の正の向きは、中心軸Ｊ１を中心とした第１周方向θ１の正の向きと逆向きである。本実施形態において第２周方向θ２の正の向きは、ポンプ駆動シャフトの回転軸周りの一方の向きに相当する。第２周方向θ２の負の向きは、ポンプ駆動シャフトの回転軸周りの他方の向きに相当する。 In the following description, the circumferential direction around the rotation axis J2 is referred to as "second circumferential direction θ2". Of the second circumferential direction θ2, viewed from the other side in the axial direction to one side in the axial direction, the direction advancing counterclockwise is the positive direction of the second circumferential direction θ2, and the direction advancing clockwise is the second circumference The negative direction of the direction θ2 is taken. The positive direction of the second circumferential direction θ2 about the rotation axis J2 is opposite to the positive direction of the first circumferential direction θ1 about the central axis J1. In the present embodiment, the positive direction of the second circumferential direction θ2 corresponds to one direction around the rotation axis of the pump drive shaft. The negative direction of the second circumferential direction θ2 corresponds to the other direction around the rotation axis of the pump drive shaft.
　ポンプ室４３は、ハウジング１０に設けられる。ポンプ室４３は、第１外歯歯車４１および第２外歯歯車４２を収容する。吸入口４４は、吸入油路６３と繋がる。吸入口４４は、鉛直方向Ｚにおいて、第１外歯歯車４１と第２外歯歯車４２との間に配置される。吸入口４４は、例えば、軸方向および鉛直方向Ｚの両方と直交する奥行方向において、ポンプ室４３の一方側に開口する。吸入口４４は、吸入油路６３を介して、収容部１１に貯留されるオイルＯをポンプ室４３内に吸入可能である。 The pump chamber 43 is provided in the housing 10. The pump chamber 43 accommodates the first external gear 41 and the second external gear 42. The suction port 44 is connected to the suction oil passage 63. The suction port 44 is disposed between the first external gear 41 and the second external gear 42 in the vertical direction Z. The suction port 44 opens to one side of the pump chamber 43 in the depth direction orthogonal to both the axial direction and the vertical direction Z, for example. The suction port 44 can suck the oil O stored in the storage unit 11 into the pump chamber 43 via the suction oil passage 63.
　吐出口４５は、第１油路６１と繋がる。吐出口４５は、鉛直方向Ｚにおいて、第１外歯歯車４１と第２外歯歯車４２との間に配置される。吐出口４５は、例えば、軸方向および鉛直方向Ｚの両方と直交する奥行方向において、ポンプ室４３の他方側に開口する。すなわち、吸入口４４と吐出口４５とは、奥行方向においてポンプ室４３を挟んで互いに逆側に配置される。吐出口４５は、ポンプ室４３内から第１油路６１へとオイルＯを吐出可能である。本実施形態においてポンプ部４０は、第１外歯歯車４１と第２外歯歯車４２とが噛み合って回転することでオイルＯを送る。 The discharge port 45 is connected to the first oil passage 61. The discharge port 45 is disposed between the first external gear 41 and the second external gear 42 in the vertical direction Z. The discharge port 45 opens to the other side of the pump chamber 43 in the depth direction orthogonal to both the axial direction and the vertical direction Z, for example. That is, the suction port 44 and the discharge port 45 are disposed on opposite sides of the pump chamber 43 in the depth direction. The discharge port 45 can discharge the oil O from the inside of the pump chamber 43 to the first oil passage 61. In the present embodiment, the pump unit 40 feeds the oil O by the rotation of the first external gear 41 and the second external gear 42 engaged with each other.
　ポンプ駆動部５０は、ポンプ部４０の軸方向一方側に配置される。ポンプ駆動部５０は、ハウジング１０に取り付けられる。ポンプ駆動部５０は、ポンプ駆動シャフト５１を有するモータである。ポンプ駆動シャフト５１は、例えば、回転軸Ｊ２に沿って配置され、軸方向に延びる。ポンプ駆動部５０は、ポンプ駆動シャフト５１を介してポンプ部４０を駆動可能である。 The pump drive unit 50 is disposed on one side in the axial direction of the pump unit 40. The pump drive unit 50 is attached to the housing 10. The pump drive unit 50 is a motor having a pump drive shaft 51. The pump drive shaft 51 is, for example, disposed along the rotation axis J2 and extends in the axial direction. The pump drive unit 50 can drive the pump unit 40 via the pump drive shaft 51.
　第１クラッチ７１は、モータシャフト２１とポンプ部４０との接続および切断を切り換える。より詳細には、第１クラッチ７１は、モータシャフト２１と第１外歯歯車４１との接続および切断を切り換える。本実施形態において第１クラッチ７１は、ワンウェイクラッチである。第１クラッチ７１は、モータシャフト２１が第１外歯歯車４１に対して第１周方向θ１の正の向きに相対回転しようとする場合に、モータシャフト２１と第１外歯歯車４１とを接続する。これにより、モータシャフト２１の回転が第１外歯歯車４１に伝達され、モータシャフト２１とともに第１外歯歯車４１が第１周方向θ１の正の向きに回転する。 The first clutch 71 switches connection and disconnection between the motor shaft 21 and the pump unit 40. More specifically, the first clutch 71 switches between connection and disconnection of the motor shaft 21 and the first external gear 41. In the present embodiment, the first clutch 71 is a one-way clutch. The first clutch 71 connects the motor shaft 21 and the first external gear 41 when the motor shaft 21 tries to rotate relative to the first external gear 41 in the positive direction of the first circumferential direction θ1. Do. Thus, the rotation of the motor shaft 21 is transmitted to the first external gear 41, and the first external gear 41 rotates with the motor shaft 21 in the positive direction of the first circumferential direction θ1.
　一方、第１クラッチ７１は、モータシャフト２１が第１外歯歯車４１に対して第１周方向θ１の負の向きに相対回転しようとする場合に、モータシャフト２１と第１外歯歯車４１との接続を切断する。これにより、モータシャフト２１の回転は第１外歯歯車４１に伝達されず、モータシャフト２１は、第１外歯歯車４１に対して第１周方向θ１の負の向きに相対回転する。すなわち、モータシャフト２１と第１外歯歯車４１とは互いに空転する。以上のように、第１クラッチ７１は、第１外歯歯車４１に対するモータシャフト２１の第１周方向θ１の相対回転のうち、正の向きの相対回転を阻止し、負の向きの相対回転を許容する。 On the other hand, when the motor shaft 21 is to rotate relative to the first external gear 41 in the negative direction of the first circumferential direction θ1 with respect to the first external gear 41, the first clutch 71 and the first external gear 41 Disconnect from Thus, the rotation of the motor shaft 21 is not transmitted to the first external gear 41, and the motor shaft 21 rotates relative to the first external gear 41 in the negative direction of the first circumferential direction θ1. That is, the motor shaft 21 and the first external gear 41 idle on each other. As described above, of the relative rotation of the motor shaft 21 in the first circumferential direction θ1 with respect to the first external gear 41, the first clutch 71 prevents relative rotation in the positive direction and causes relative rotation in the negative direction. Tolerate.
　図示は省略するが、例えば、第１クラッチ７１は、内輪と、内輪を囲む外輪と、を有する。第１クラッチ７１の内輪は、モータシャフト２１の軸方向一方側の端部に嵌め合わされて固定される。第１クラッチ７１の外輪の外周面には、第１外歯歯車４１が嵌め合わされて固定される。第１クラッチ７１の内輪と第１クラッチ７１の外輪とは、内輪が外輪に対して第１周方向θ１の正の向きに相対回転しようとする際には、互いに接続される。第１クラッチ７１の内輪と第１クラッチ７１の外輪とは、内輪が外輪に対して第１周方向θ１の負の向きに相対回転しようとする際には、接続が切断される。第１クラッチ７１の内輪は、モータシャフト２１とともに回転する。したがって、第１クラッチ７１における内輪と外輪とがこのようにして接続および切断されることで、上述したようにしてモータシャフト２１の回転する向きに応じて、第１外歯歯車４１への回転伝達の有無が切り換えられる。 Although illustration is omitted, for example, the first clutch 71 has an inner ring and an outer ring surrounding the inner ring. The inner ring of the first clutch 71 is fitted and fixed to an end of the motor shaft 21 on one side in the axial direction. The first external gear 41 is fitted and fixed to the outer peripheral surface of the outer ring of the first clutch 71. The inner ring of the first clutch 71 and the outer ring of the first clutch 71 are connected to each other when the inner ring tries to rotate relative to the outer ring in the positive direction of the first circumferential direction θ1. The connection between the inner ring of the first clutch 71 and the outer ring of the first clutch 71 is disconnected when the inner ring tries to rotate relative to the outer ring in the negative direction of the first circumferential direction θ1. The inner ring of the first clutch 71 rotates with the motor shaft 21. Therefore, as the inner ring and the outer ring in the first clutch 71 are connected and disconnected in this manner, the rotation transmission to the first external gear 41 according to the rotation direction of the motor shaft 21 as described above. The presence or absence of is switched.
　第２クラッチ７２は、ポンプ駆動シャフト５１とポンプ部４０との接続および切断を切り換える。より詳細には、第２クラッチ７２は、ポンプ駆動シャフト５１と第２外歯歯車４２との接続および切断を切り換える。本実施形態において第２クラッチ７２は、ワンウェイクラッチである。第２クラッチ７２は、ポンプ駆動シャフト５１が第２外歯歯車４２に対して第２周方向θ２の正の向きに相対回転しようとする場合に、ポンプ駆動シャフト５１と第２外歯歯車４２とを接続する。これにより、ポンプ駆動シャフト５１の回転が第２外歯歯車４２に伝達され、ポンプ駆動シャフト５１とともに第２外歯歯車４２が第２周方向θ２の正の向きに回転する。 The second clutch 72 switches between connection and disconnection of the pump drive shaft 51 and the pump unit 40. More specifically, the second clutch 72 switches between connection and disconnection of the pump drive shaft 51 and the second external gear 42. In the present embodiment, the second clutch 72 is a one-way clutch. When the pump drive shaft 51 is to rotate relative to the second external gear 42 in the positive direction of the second circumferential direction θ 2, the second clutch 72 is configured to move the pump drive shaft 51 and the second external gear 42 together. Connect Thus, the rotation of the pump drive shaft 51 is transmitted to the second external gear 42, and the second external gear 42 rotates with the pump drive shaft 51 in the positive direction of the second circumferential direction θ2.
　一方、第２クラッチ７２は、ポンプ駆動シャフト５１が第２外歯歯車４２に対して第２周方向θ２の負の向きに相対回転しようとする場合に、ポンプ駆動シャフト５１と第２外歯歯車４２との接続を切断する。これにより、ポンプ駆動シャフト５１の回転は第２外歯歯車４２に伝達されず、ポンプ駆動シャフト５１は、第２外歯歯車４２に対して第２周方向θ２の負の向きに相対回転する。すなわち、ポンプ駆動シャフト５１と第２外歯歯車４２とは互いに空転する。以上のように、第２クラッチ７２は、第２外歯歯車４２に対するポンプ駆動シャフト５１の第２周方向θ２の相対回転のうち、正の向きの相対回転を阻止し、負の向きの相対回転を許容する。 On the other hand, when the pump drive shaft 51 is to rotate relative to the second external gear 42 in the negative direction of the second circumferential direction θ2 with respect to the second clutch 72, the pump drive shaft 51 and the second external gear Disconnect the connection with 42. Thus, the rotation of the pump drive shaft 51 is not transmitted to the second external gear 42, and the pump drive shaft 51 rotates relative to the second external gear 42 in the negative direction of the second circumferential direction θ2. That is, the pump drive shaft 51 and the second external gear 42 idle on each other. As described above, of the relative rotation of the pump drive shaft 51 in the second circumferential direction θ2 with respect to the second external gear 42, the second clutch 72 prevents the relative rotation in the positive direction, and the relative rotation in the negative direction. Allow
　図示は省略するが、例えば、第２クラッチ７２は、第１クラッチ７１と同様に、内輪と、内輪を囲む外輪と、を有する。第２クラッチ７２の内輪は、ポンプ駆動シャフト５１の軸方向他方側の端部に嵌め合わされて固定される。第２クラッチ７２の外輪の外周面には、第２外歯歯車４２が嵌め合わされて固定される。第２クラッチ７２の内輪と第２クラッチ７２の外輪とは、内輪が外輪に対して第２周方向θ２の正の向きに相対回転しようとする際には、互いに接続される。第２クラッチ７２の内輪と第２クラッチ７２の外輪とは、内輪が外輪に対して第２周方向θ２の負の向きに相対回転しようとする際には、接続が切断される。第２クラッチ７２の内輪は、ポンプ駆動シャフト５１とともに回転する。したがって、第２クラッチ７２における内輪と外輪とがこのようにして接続および切断されることで、上述したようにしてポンプ駆動シャフト５１の回転する向きに応じて、第２外歯歯車４２への回転伝達の有無が切り換えられる。 Although illustration is omitted, for example, the second clutch 72 has an inner ring and an outer ring surrounding the inner ring, like the first clutch 71. The inner ring of the second clutch 72 is fitted and fixed to the other end of the pump drive shaft 51 in the axial direction. The second external gear 42 is fitted and fixed to the outer peripheral surface of the outer ring of the second clutch 72. The inner ring of the second clutch 72 and the outer ring of the second clutch 72 are connected to each other when the inner ring is to rotate relative to the outer ring in the positive direction of the second circumferential direction θ2. The connection between the inner ring of the second clutch 72 and the outer ring of the second clutch 72 is disconnected when the inner ring is to rotate relative to the outer ring in the negative direction of the second circumferential direction θ2. The inner ring of the second clutch 72 rotates with the pump drive shaft 51. Therefore, as the inner ring and the outer ring in the second clutch 72 are connected and disconnected in this manner, rotation to the second external gear 42 according to the rotation direction of the pump drive shaft 51 as described above. The presence or absence of transmission can be switched.
　第１クラッチ７１および第２クラッチ７２は、上述したように一方向きの回転の伝達を許容し、他方向きの回転の伝達を遮断するワンウェイクラッチであれば、特に限定されない。第１クラッチ７１および第２クラッチ７２は、例えば、スプラグ式のワンウェイクラッチであってもよいし、カム式のワンウェイクラッチであってもよい。 The first clutch 71 and the second clutch 72 are not particularly limited as long as they are one-way clutches that allow transmission of rotation in one direction as described above and block transmission of rotation in the other direction. The first clutch 71 and the second clutch 72 may be, for example, a sprag type one way clutch or a cam type one way clutch.
　モータシャフト２１が第１周方向θ１の正の向きに回転すると、モータシャフト２１の回転が第１クラッチ７１を介して第１外歯歯車４１に伝達され、第１外歯歯車４１が第１周方向θ１の正の向きに回転する。これにより、第１外歯歯車４１と噛み合う第２外歯歯車４２が第２周方向θ２の正の向きに回転して、吸入油路６３から吸入口４４を介してポンプ室４３内に吸入されるオイルＯが、第１外歯歯車４１と第２外歯歯車４２との間を介して吐出口４５へと送られる。このようにして、ポンプ部４０は、モータシャフト２１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、第１油路６１に流入し、第２油路６２へと流入する。第２油路６２に流入したオイルＯは、回転するモータシャフト２１の遠心力によって、径方向外側に力を受け、貫通孔２１ａ，２１ｂを通ってモータシャフト２１の外部へと流出する。 When the motor shaft 21 rotates in the positive direction of the first circumferential direction θ 1, the rotation of the motor shaft 21 is transmitted to the first external gear 41 via the first clutch 71, and the first external gear 41 has a first circumference. It rotates in the positive direction of the direction θ1. As a result, the second external gear 42 engaged with the first external gear 41 rotates in the positive direction of the second circumferential direction θ2 and is drawn into the pump chamber 43 from the suction oil passage 63 via the suction port 44. Oil O is sent to the discharge port 45 via the space between the first external gear 41 and the second external gear 42. Thus, the pump unit 40 is driven via the motor shaft 21. The oil O discharged from the discharge port 45 flows into the first oil passage 61 and flows into the second oil passage 62. The oil O flowing into the second oil passage 62 receives a force radially outward by the centrifugal force of the rotating motor shaft 21, and flows out of the motor shaft 21 through the through holes 21a and 21b.
　貫通孔２１ａ，２１ｂから流出したオイル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油路６２は、モータシャフト２１の内部に設けられるため、貫通孔２１ａ，２１ｂから流出されるまでのオイルＯによって、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、ロータ２０とステータ３０とに導かれる。 The oil O that has flowed out of the through holes 21 a and 21 b is sprayed to the coil 32. Thereby, the coil 32 can be cooled by the oil O. In the present embodiment, since the second oil passage 62 is provided inside the motor shaft 21, the rotor 20 can also be cooled by the oil O until it flows out from the through holes 21a and 21b. Thus, the oil O discharged from the discharge port 45 in the present embodiment is led to the rotor 20 and the stator 30.
　ロータ２０は回転するため、貫通孔２１ａ，２１ｂの周方向位置は、ロータ２０の回転に伴って変化する。これにより、貫通孔２１ａ，２１ｂから流出されるオイルＯの向きは第１周方向θ１に変化し、第１周方向θ１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。 Since the rotor 20 rotates, the circumferential position of the through holes 21 a and 21 b changes as the rotor 20 rotates. Thus, the direction of the oil O flowing out of the through holes 21a and 21b changes in the first circumferential direction θ1, and the plurality of coils 32 disposed along the first circumferential direction θ1 can be cooled by the oil O. .
　以上のようにして、モータシャフト２１の回転によってポンプ部４０を駆動することができ、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を吸い上げてロータ２０およびステータ３０に供給することができる。すなわち、ポンプ部４０は、収容部１１に貯留されたオイルＯをロータ２０とステータ３０との両方に送る。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、ロータ２０およびステータ３０を冷却することができる。ステータ３０に供給されたオイルＯは、収容部１１内を落下して、再び収容部１１の内部における鉛直方向下側領域に貯留される。これにより、収容部１１内のオイルＯを循環させることができる。 As described above, the pump unit 40 can be driven by the rotation of the motor shaft 21, and the oil O stored in the housing 10 can be sucked up by the pump unit 40 and supplied to the rotor 20 and the stator 30. That is, the pump unit 40 sends the oil O stored in the storage unit 11 to both the rotor 20 and the stator 30. Thereby, the rotor 20 and the stator 30 can be cooled by utilizing the oil O stored in the housing 10. The oil O supplied to the stator 30 falls in the housing portion 11 and is stored again in the vertically lower region in the housing portion 11. Thereby, the oil O in the accommodating part 11 can be circulated.
　一方、ポンプ駆動シャフト５１が第２周方向θ２の正の向きに回転すると、ポンプ駆動シャフト５１の回転が第２クラッチ７２を介して第２外歯歯車４２に伝達され、第２外歯歯車４２が第２周方向θ２の正の向きに回転する。これにより、第２外歯歯車４２と噛み合う第１外歯歯車４１が第１周方向θ１の正の向きに回転して、吸入油路６３から吸入口４４を介してポンプ室４３内に吸入されるオイルＯが、第１外歯歯車４１と第２外歯歯車４２との間を介して吐出口４５へと送られる。このようにして、ポンプ部４０は、ポンプ駆動シャフト５１を介して駆動される。吐出口４５へ送られたオイルＯは、モータシャフト２１によってポンプ部４０が駆動される場合と同様に、ロータ２０およびステータ３０に供給される。これにより、ポンプ駆動部５０によってポンプ部４０を駆動できる。 On the other hand, when the pump drive shaft 51 rotates in the positive direction of the second circumferential direction θ2, the rotation of the pump drive shaft 51 is transmitted to the second external gear 42 via the second clutch 72, and the second external gear 42 Rotates in the positive direction of the second circumferential direction θ2. As a result, the first external gear 41 engaged with the second external gear 42 rotates in the positive direction of the first circumferential direction θ1, and is drawn into the pump chamber 43 from the suction oil passage 63 via the suction port 44. Oil O is sent to the discharge port 45 via the space between the first external gear 41 and the second external gear 42. Thus, the pump unit 40 is driven via the pump drive shaft 51. The oil O sent to the discharge port 45 is supplied to the rotor 20 and the stator 30 in the same manner as when the pump unit 40 is driven by the motor shaft 21. Thus, the pump drive unit 50 can drive the pump unit 40.
　本実施形態によれば、上述したようにして、ポンプ駆動部５０によってポンプ部４０を駆動することができる。そのため、モータシャフト２１の回転速度が比較的低速の場合であっても、ポンプ駆動部５０によってポンプ部４０を駆動することで、ポンプ部４０を必要な回転速度で駆動させることができる。これにより、モータシャフト２１の回転速度が比較的低速の場合であっても、ポンプ部４０によるオイルＯの供給量を維持できる。 According to this embodiment, the pump drive unit 50 can drive the pump unit 40 as described above. Therefore, even when the rotational speed of the motor shaft 21 is relatively low, the pump 40 can be driven at a required rotational speed by driving the pump 40 by the pump drive unit 50. Thus, even when the rotational speed of the motor shaft 21 is relatively low, the amount of oil O supplied by the pump unit 40 can be maintained.
　また、本実施形態によれば、モータシャフト２１とポンプ部４０との接続および切断を切り換える第１クラッチ７１が設けられる。そのため、ポンプ駆動部５０によってポンプ部４０を駆動させる際にモータシャフト２１とポンプ部４０との接続を切断することで、ポンプ部４０の回転、すなわち第１外歯歯車４１の回転がモータシャフト２１に伝達されることを遮断できる。したがって、モータシャフト２１の回転を所望の回転速度に維持しやすい。 Further, according to the present embodiment, the first clutch 71 that switches between connection and disconnection of the motor shaft 21 and the pump unit 40 is provided. Therefore, when driving the pump unit 40 by the pump drive unit 50, the motor shaft 21 and the pump unit 40 are disconnected to rotate the pump unit 40, that is, the rotation of the first external gear 41 as the motor shaft 21. Can be blocked from being transmitted to Therefore, it is easy to maintain the rotation of the motor shaft 21 at a desired rotational speed.
　また、モータシャフト２１が第１周方向θ１の負の向きに回転する場合、すなわちモータシャフト２１がポンプ部４０を駆動できる向きと逆向きに回転する場合に、モータシャフト２１とポンプ部４０との接続を切断することで、ポンプ部４０が逆回転することを抑制できる。この状態で、ポンプ駆動部５０によってポンプ部４０を駆動させることで、ロータ２０およびステータ３０にオイルＯを供給できる。したがって、モータシャフト２１が逆回転する場合であっても、ポンプ部４０によるオイルＯの供給量を維持できる。 When the motor shaft 21 rotates in the negative direction of the first circumferential direction θ1, that is, when the motor shaft 21 rotates in the direction opposite to the direction in which the pump portion 40 can be driven, the motor shaft 21 and the pump portion 40 By disconnecting the connection, it is possible to suppress reverse rotation of the pump unit 40. In this state, by driving the pump unit 40 by the pump drive unit 50, the oil O can be supplied to the rotor 20 and the stator 30. Therefore, even when the motor shaft 21 rotates in the reverse direction, the amount of oil O supplied by the pump unit 40 can be maintained.
　以上のようにして、本実施形態によれば、モータシャフト２１を介して駆動されるポンプ部４０を備え、モータシャフト２１の回転状態によらずポンプ部４０を安定して駆動できる駆動装置１が得られる。したがって、モータシャフト２１の回転状態によらず、オイルＯの供給量を維持できる。また、第１クラッチ７１が切断状態となることで、ポンプ駆動部５０によってポンプ部４０が駆動される際に、ポンプ部４０を回転させる負荷がモータシャフト２１に加えられない。そのため、モータシャフト２１を回転させる負荷を低減することができる。 As described above, according to the present embodiment, the drive device 1 includes the pump unit 40 driven via the motor shaft 21 and can stably drive the pump unit 40 regardless of the rotational state of the motor shaft 21. can get. Therefore, the amount of oil O supplied can be maintained regardless of the rotational state of the motor shaft 21. In addition, when the first clutch 71 is in the disconnected state, a load for rotating the pump unit 40 is not applied to the motor shaft 21 when the pump drive unit 50 drives the pump unit 40. Therefore, the load for rotating the motor shaft 21 can be reduced.
　また、本実施形態によれば、第１クラッチ７１は、ワンウェイクラッチである。そのため、ポンプ部４０に対してモータシャフト２１が回転する向きに応じて、自動的に第１クラッチ７１の状態を接続と切断との間で切り換えることができ、簡便である。 Further, according to the present embodiment, the first clutch 71 is a one-way clutch. Therefore, the state of the first clutch 71 can be automatically switched between connection and disconnection according to the direction in which the motor shaft 21 rotates with respect to the pump unit 40, which is simple.
　本実施形態では、第１クラッチ７１は、第１外歯歯車４１に対するモータシャフト２１の第１周方向θ１の相対回転のうち、正の向きの相対回転を阻止し、負の向きの相対回転を許容する。そのため、モータシャフト２１が第１外歯歯車４１に対して第１周方向θ１の正の向きに相対回転しようとする場合に、モータシャフト２１によって第１外歯歯車４１を回転させることができる。 In the present embodiment, of the relative rotation of the motor shaft 21 in the first circumferential direction θ1 with respect to the first external gear 41, the first clutch 71 prevents relative rotation in the positive direction and relative rotation in the negative direction. Tolerate. Therefore, when the motor shaft 21 is to rotate relative to the first external gear 41 in the positive direction of the first circumferential direction θ 1, the first external gear 41 can be rotated by the motor shaft 21.
　一方、モータシャフト２１の回転速度が比較的低速の場合、例えば、ポンプ駆動部５０によって回転される第１外歯歯車４１の回転速度は、モータシャフト２１の回転速度よりも大きくなる。そのため、モータシャフト２１は、第１外歯歯車４１に対して相対的に第１周方向θ１の負の向きに回転する。これにより、モータシャフト２１と第１外歯歯車４１との接続が切断された状態となり、第１外歯歯車４１に対するモータシャフト２１の相対回転が許容される。したがって、ポンプ駆動部５０によって回転される第１外歯歯車４１によってモータシャフト２１の回転が阻害されることを防止できる。 On the other hand, when the rotational speed of the motor shaft 21 is relatively low, for example, the rotational speed of the first external gear 41 rotated by the pump drive unit 50 is larger than the rotational speed of the motor shaft 21. Therefore, the motor shaft 21 rotates in the negative direction of the first circumferential direction θ1 relatively to the first external gear 41. As a result, the connection between the motor shaft 21 and the first external gear 41 is disconnected, and relative rotation of the motor shaft 21 with respect to the first external gear 41 is permitted. Therefore, it is possible to prevent the rotation of the motor shaft 21 from being impeded by the first external gear 41 rotated by the pump drive unit 50.
　また、モータシャフト２１が第１周方向θ１の負の向きに回転する場合、モータシャフト２１は、第１外歯歯車４１に対して相対的に第１周方向θ１の負の向きに回転する。これにより、モータシャフト２１と第１外歯歯車４１との接続が切断された状態となり、モータシャフト２１の回転が第１外歯歯車４１の回転を阻害することを防止できる。 When the motor shaft 21 rotates in the negative direction of the first circumferential direction θ1, the motor shaft 21 rotates in the negative direction of the first circumferential direction θ1 relative to the first external gear 41. As a result, the connection between the motor shaft 21 and the first external gear 41 is disconnected, and the rotation of the motor shaft 21 can be prevented from inhibiting the rotation of the first external gear 41.
　また、本実施形態によれば、ポンプ駆動シャフト５１とポンプ部４０との接続および切断を切り換える第２クラッチ７２が設けられる。そのため、モータシャフト２１によってポンプ部４０が駆動される際にポンプ駆動シャフト５１とポンプ部４０との接続を切断することで、ポンプ部４０の回転がポンプ駆動シャフト５１に伝達されることを防止できる。したがって、モータシャフト２１にポンプ駆動シャフト５１を回転させる負荷が加えられることがなく、モータシャフト２１によってポンプ部４０を駆動させる際の負荷が増大することを抑制できる。また、ポンプ駆動部５０に過剰な逆起電圧が生じることを抑制できる。 Further, according to the present embodiment, the second clutch 72 that switches between connection and disconnection of the pump drive shaft 51 and the pump unit 40 is provided. Therefore, by disconnecting the connection between the pump drive shaft 51 and the pump unit 40 when the pump unit 40 is driven by the motor shaft 21, transmission of the rotation of the pump unit 40 to the pump drive shaft 51 can be prevented. . Therefore, a load for rotating the pump drive shaft 51 is not applied to the motor shaft 21, and an increase in load when the pump portion 40 is driven by the motor shaft 21 can be suppressed. Moreover, it can suppress that an excess back electromotive force arises in the pump drive part 50. FIG.
　また、本実施形態によれば、第２クラッチ７２は、ワンウェイクラッチである。そのため、ポンプ部４０に対してポンプ駆動シャフト５１が回転する向きに応じて、自動的に第２クラッチ７２の状態を接続と切断との間で切り換えることができ、簡便である。 Further, according to the present embodiment, the second clutch 72 is a one-way clutch. Therefore, the state of the second clutch 72 can be automatically switched between connection and disconnection according to the direction in which the pump drive shaft 51 rotates with respect to the pump unit 40, which is simple.
　本実施形態では、第２クラッチ７２は、第２外歯歯車４２に対するポンプ駆動シャフト５１の第２周方向θ２の相対回転のうち、正の向きの相対回転を阻止し、負の向きの相対回転を許容する。そのため、ポンプ駆動シャフト５１が第２外歯歯車４２に対して第２周方向θ２の正の向きに相対回転しようとする場合に、ポンプ駆動シャフト５１によって第２外歯歯車４２を回転させることができる。 In the present embodiment, of the relative rotation of the pump drive shaft 51 in the second circumferential direction θ2 with respect to the second external gear 42, the second clutch 72 prevents relative rotation in the positive direction, and relative rotation in the negative direction. Allow Therefore, when the pump drive shaft 51 is to rotate relative to the second external gear 42 in the positive direction of the second circumferential direction θ 2, the pump drive shaft 51 may rotate the second external gear 42. it can.
　一方、モータシャフト２１によってポンプ部４０が駆動される場合、第２外歯歯車４２は、第２周方向θ２の正の向きに回転する。そのため、ポンプ駆動シャフト５１は、第２外歯歯車４２に対して相対的に第２周方向θ２の負の向きに回転する。これにより、ポンプ駆動シャフト５１と第２外歯歯車４２との接続が切断された状態となり、第２外歯歯車４２に対するポンプ駆動シャフト５１の相対回転が許容される。したがって、モータシャフト２１によってポンプ部４０が駆動されても、ポンプ駆動シャフト５１が回転することを防止できる。 On the other hand, when the pump unit 40 is driven by the motor shaft 21, the second external gear 42 rotates in the positive direction of the second circumferential direction θ2. Therefore, the pump drive shaft 51 rotates in the negative direction of the second circumferential direction θ2 relatively to the second external gear 42. As a result, the connection between the pump drive shaft 51 and the second external gear 42 is disconnected, and relative rotation of the pump drive shaft 51 with respect to the second external gear 42 is permitted. Therefore, even if the pump unit 40 is driven by the motor shaft 21, the pump drive shaft 51 can be prevented from rotating.
　また、本実施形態によれば、ポンプ部４０は、第１外歯歯車４１と第２外歯歯車４２とを有する。第１外歯歯車４１にはモータシャフト２１の回転が伝達され、第２外歯歯車４２にはポンプ駆動シャフト５１の回転が伝達される。すなわち、モータシャフト２１とポンプ駆動シャフト５１とが異なる外歯歯車に接続されて、ポンプ部４０と接続される。したがって、モータシャフト２１とポンプ駆動シャフト５１とを同じ外歯歯車に接続する場合に比べて、ポンプ駆動部５０の配置自由度を向上できる。また、ポンプ駆動部５０の配置自由度を向上できるため、ハウジング１０に設けられる第１油路６１および吸入油路６３の配置自由度も向上できる。 Further, according to the present embodiment, the pump unit 40 has the first external gear 41 and the second external gear 42. The rotation of the motor shaft 21 is transmitted to the first external gear 41, and the rotation of the pump drive shaft 51 is transmitted to the second external gear 42. That is, the motor shaft 21 and the pump drive shaft 51 are connected to different external gears and connected to the pump unit 40. Therefore, as compared with the case where the motor shaft 21 and the pump drive shaft 51 are connected to the same external gear, the arrangement freedom of the pump drive unit 50 can be improved. Moreover, since the arrangement freedom of the pump drive part 50 can be improved, the arrangement freedom of the first oil passage 61 and the suction oil passage 63 provided in the housing 10 can also be improved.
　また、本実施形態によれば、第１油路６１および第２油路６２が設けられることで、吐出口４５から吐出されたオイルＯをモータシャフト２１の内部に送ることができる。また、貫通孔２１ａ，２１ｂが設けられるため、第２油路６２内に流入したオイルＯを貫通孔２１ａ，２１ｂを介してステータ３０に供給することができる。 Further, according to the present embodiment, the oil O discharged from the discharge port 45 can be sent to the inside of the motor shaft 21 by providing the first oil passage 61 and the second oil passage 62. Further, since the through holes 21a and 21b are provided, the oil O flowing into the second oil passage 62 can be supplied to the stator 30 through the through holes 21a and 21b.
　また、本実施形態のように貫通孔２１ａ，２１ｂからオイルＯを流出させてコイル３２に吹き付ける構成の場合、ポンプ部４０からのオイルＯの供給量がある程度大きくないと、オイルＯを好適にコイル３２に吹き付けにくい。これに対して、本実施形態によれば、上述したように、ポンプ部４０を安定して駆動でき、オイルＯの供給量を維持できるため、モータシャフト２１の回転速度によらず、貫通孔２１ａ，２１ｂを介して、オイルＯを好適にコイル３２に吹き付けることができる。 Further, in the case of the configuration in which the oil O is discharged from the through holes 21a and 21b and sprayed to the coil 32 as in the present embodiment, the oil O is preferably coiled if the supply amount of the oil O from the pump unit 40 is not large. Hard to spray on 32 On the other hand, according to the present embodiment, as described above, the pump unit 40 can be stably driven, and the supply amount of the oil O can be maintained. , 21b, oil O can be suitably sprayed onto the coil 32.
＜第２実施形態＞　図２に示すように、本実施形態の駆動装置２においてポンプ部１４０は、第３外歯歯車１４１と、内歯歯車１４２と、を有する。第３外歯歯車１４１は、外周面に複数の歯部を有する。第３外歯歯車１４１の歯部の歯形は、例えば、トロコイド歯形である。第３外歯歯車１４１は、中心軸Ｊ１周りに回転可能に配置される。第３外歯歯車１４１には、モータシャフト２１の回転が第１クラッチ１７１を介して伝達される。本実施形態において第３外歯歯車１４１は、第１回転部および第２回転部に相当する。 Second Embodiment As shown in FIG. 2, in the drive device 2 of the present embodiment, the pump unit 140 has a third external gear 141 and an internal gear 142. The third external gear 141 has a plurality of teeth on the outer peripheral surface. The tooth shape of the tooth portion of the third external gear 141 is, for example, a trochoidal tooth shape. The third external gear 141 is disposed rotatably around the central axis J1. The rotation of the motor shaft 21 is transmitted to the third external gear 141 via the first clutch 171. In the present embodiment, the third external gear 141 corresponds to a first rotating portion and a second rotating portion.
　内歯歯車１４２は、中心軸Ｊ１に対して偏心する軸周りに回転可能な円環状の歯車である。内歯歯車１４２は、第３外歯歯車１４１の径方向外側を囲み、第３外歯歯車１４１と噛み合う。内歯歯車１４２は、内周面に複数の歯部を有する。内歯歯車１４２の歯部の歯形は、トロコイド歯形である。本実施形態においてポンプ室１４３は、第３外歯歯車１４１および内歯歯車１４２を収容する。 The internal gear 142 is an annular gear rotatable around an axis eccentric to the central axis J1. The internal gear 142 surrounds the radially outer side of the third external gear 141 and meshes with the third external gear 141. The internal gear 142 has a plurality of teeth on its inner circumferential surface. The tooth profile of the teeth of the internal gear 142 is a trochoid tooth profile. In the present embodiment, the pump chamber 143 accommodates the third external gear 141 and the internal gear 142.
　吸入口１４４はポンプ室１４３の軸方向他方側に開口する。吐出口１４５は、ポンプ室１４３の軸方向一方側に開口する。吸入口１４４と吐出口１４５とは、それぞれ第３外歯歯車１４１と内歯歯車１４２との隙間と繋がる。 The suction port 144 opens to the other axial side of the pump chamber 143. The discharge port 145 opens on one side in the axial direction of the pump chamber 143. The suction port 144 and the discharge port 145 are respectively connected to the gap between the third external gear 141 and the internal gear 142.
　本実施形態においてポンプ駆動部１５０のポンプ駆動シャフト１５１の回転は、第２クラッチ１７２を介して第３外歯歯車１４１に伝達される。すなわち、本実施形態においては、モータシャフト２１の回転とポンプ駆動シャフト１５１の回転とが、同一の外歯歯車に伝達される。本実施形態においてポンプ駆動シャフト１５１は、例えば、ポンプ部１４０の軸方向一方側において中心軸Ｊ１に沿って配置される。すなわち、本実施形態においてポンプ駆動シャフト１５１の回転軸は、中心軸Ｊ１である。 In the present embodiment, the rotation of the pump drive shaft 151 of the pump drive unit 150 is transmitted to the third external gear 141 via the second clutch 172. That is, in the present embodiment, the rotation of the motor shaft 21 and the rotation of the pump drive shaft 151 are transmitted to the same external gear. In the present embodiment, the pump drive shaft 151 is disposed, for example, along the central axis J1 on one side in the axial direction of the pump portion 140. That is, in the present embodiment, the rotation axis of the pump drive shaft 151 is the central axis J1.
　第１クラッチ１７１は、モータシャフト２１と第３外歯歯車１４１との接続および切断を切り換える。本実施形態において第１クラッチ１７１は、遠心クラッチである。第１クラッチ１７１は、モータシャフト２１の回転速度が所定速度以上の場合にモータシャフト２１と第３外歯歯車１４１とを接続する。一方、第１クラッチ１７１は、モータシャフト２１の回転速度が所定速度よりも小さい場合に、モータシャフト２１と第３外歯歯車１４１との接続を切断する。 The first clutch 171 switches between connection and disconnection of the motor shaft 21 and the third external gear 141. In the present embodiment, the first clutch 171 is a centrifugal clutch. The first clutch 171 connects the motor shaft 21 and the third external gear 141 when the rotational speed of the motor shaft 21 is equal to or higher than a predetermined speed. On the other hand, the first clutch 171 disconnects the connection between the motor shaft 21 and the third external gear 141 when the rotational speed of the motor shaft 21 is smaller than a predetermined speed.
　本実施形態において第２クラッチ１７２は、ポンプ駆動部１５０のポンプ駆動シャフト１５１と第３外歯歯車１４１との接続および切断を切り換える。第２クラッチ１７２は、第１実施形態と同様に、ワンウェイクラッチである。第２クラッチ１７２は、ポンプ駆動シャフト１５１が第３外歯歯車１４１に対して第１周方向θ１の正の向きに相対回転しようとする場合に、ポンプ駆動シャフト１５１と第３外歯歯車１４１とを接続する。一方、第２クラッチ１７２は、ポンプ駆動シャフト１５１が第３外歯歯車１４１に対して第１周方向θ１の負の向きに相対回転しようとする場合に、ポンプ駆動シャフト１５１と第３外歯歯車１４１との接続を切断する。すなわち、第２クラッチ１７２は、第３外歯歯車１４１に対するポンプ駆動シャフト１５１の回転軸周りの相対回転のうち、一方の向きの相対回転を阻止し、他方の向きの相対回転を許容する。 In the present embodiment, the second clutch 172 switches connection and disconnection between the pump drive shaft 151 of the pump drive unit 150 and the third external gear 141. The second clutch 172 is a one-way clutch as in the first embodiment. When the pump drive shaft 151 is to rotate relative to the third external gear 141 in the positive direction of the first circumferential direction θ 1, the second clutch 172 is configured to move the pump drive shaft 151 and the third external gear 141 together. Connect On the other hand, when the pump drive shaft 151 tries to rotate relative to the third external gear 141 in the negative direction of the first circumferential direction θ1 with respect to the third clutch 172, the pump drive shaft 151 and the third external gear Disconnect the connection with 141. That is, of the relative rotation around the rotation axis of the pump drive shaft 151 with respect to the third external gear 141, the second clutch 172 prevents relative rotation in one direction and allows relative rotation in the other direction.
　本実施形態において、ポンプ駆動シャフト１５１の回転軸周りの一方の向きは、第１周方向θ１の正の向きである。ポンプ駆動シャフト１５１の回転軸周りの他方の向きは、第１周方向θ１の負の向きである。 In the present embodiment, one direction around the rotation axis of the pump drive shaft 151 is a positive direction in the first circumferential direction θ1. The other direction around the rotation axis of the pump drive shaft 151 is the negative direction of the first circumferential direction θ1.
　本実施形態によれば、第１実施形態と同様にして、第１クラッチ１７１が設けられ、かつ、ポンプ駆動部１５０によってポンプ部１４０を駆動できるため、モータシャフト２１の回転状態によらずポンプ部１４０を安定して駆動できる駆動装置２が得られる。 According to the present embodiment, as in the first embodiment, the first clutch 171 is provided, and since the pump drive unit 150 can drive the pump unit 140, the pump unit is not dependent on the rotational state of the motor shaft 21. A driving device 2 capable of stably driving 140 is obtained.
　また、本実施形態によれば、第１クラッチ１７１が遠心クラッチである。そのため、モータシャフト２１の回転速度に応じて、自動的に第１クラッチ１７１の状態を接続と切断との間で切り換えることができ、簡便である。 Further, according to the present embodiment, the first clutch 171 is a centrifugal clutch. Therefore, according to the rotational speed of the motor shaft 21, the state of the first clutch 171 can be automatically switched between connection and disconnection, which is simple.
　本実施形態では、第１クラッチ１７１は、モータシャフト２１の回転速度が所定速度以上の場合にモータシャフト２１とポンプ部１４０とを接続し、モータシャフト２１の回転速度が所定速度よりも小さい場合に、モータシャフト２１とポンプ部１４０との接続を切断する。そのため、モータシャフト２１の回転速度が比較的低速の場合には、第１クラッチ１７１は切断された状態である。これにより、この状態においてポンプ駆動部１５０によってポンプ部１４０を駆動することで、モータシャフト２１の回転速度が比較的低速の場合であっても、オイルＯの供給量を維持しつつ、ポンプ部１４０の回転によってモータシャフト２１の回転が阻害されることを防止できる。 In the present embodiment, the first clutch 171 connects the motor shaft 21 and the pump portion 140 when the rotational speed of the motor shaft 21 is equal to or higher than a predetermined speed, and the rotational speed of the motor shaft 21 is smaller than the predetermined speed. , And disconnect the connection between the motor shaft 21 and the pump unit 140. Therefore, when the rotational speed of the motor shaft 21 is relatively low, the first clutch 171 is in a disconnected state. Thus, by driving the pump unit 140 by the pump drive unit 150 in this state, the pump unit 140 is maintained while maintaining the supply amount of oil O even when the rotational speed of the motor shaft 21 is relatively low. Rotation of the motor shaft 21 can be prevented from being hindered.
　また、例えば、モータシャフト２１が第１周方向θ１の負の向きに回転する場合においても、モータシャフト２１の回転速度が比較的低速であれば、第１クラッチ１７１は切断された状態である。そのため、この状態においてポンプ駆動部１５０によってポンプ部１４０を駆動することで、モータシャフト２１が逆回転する場合であっても、オイルＯの供給量を維持しつつ、ポンプ部１４０の回転によってモータシャフト２１の回転が阻害されることを防止できる。 Further, for example, even when the motor shaft 21 rotates in the negative direction of the first circumferential direction θ1, if the rotational speed of the motor shaft 21 is relatively low, the first clutch 171 is in the disconnected state. Therefore, by driving the pump unit 140 by the pump drive unit 150 in this state, even if the motor shaft 21 is reversely rotated, the motor shaft is maintained by the rotation of the pump unit 140 while maintaining the supply amount of the oil O. It is possible to prevent the rotation of 21 from being inhibited.
　例えば、駆動装置２が車両のホイールを駆動する駆動装置の場合、モータシャフト２１が逆回転する場合とは、車両が後進する場合である。この場合、車両は比較的低速で移動するため、モータシャフト２１の回転速度は比較的低速である。したがって、第１クラッチ１７１を遠心クラッチとしても、モータシャフト２１の回転状態に応じて、好適に第１クラッチ１７１の切り換えを行うことができる。 For example, in the case where the drive device 2 drives a wheel of a vehicle, the reverse rotation of the motor shaft 21 refers to the case where the vehicle reverses. In this case, since the vehicle moves at relatively low speed, the rotational speed of the motor shaft 21 is relatively low. Therefore, even if the first clutch 171 is a centrifugal clutch, the switching of the first clutch 171 can be suitably performed according to the rotation state of the motor shaft 21.
　また、本実施形態によれば、ポンプ部１４０は、第３外歯歯車１４１と、第３外歯歯車１４１の径方向外側を囲む内歯歯車１４２と、を有する。そのため、２つの外歯歯車を噛み合わせる構成に比べて、ポンプ部１４０全体を小型化しやすい。したがって、駆動装置２を小型化しやすい。 Further, according to the present embodiment, the pump portion 140 has the third external gear 141 and the internal gear 142 surrounding the radially outer side of the third external gear 141. Therefore, the entire pump portion 140 can be easily miniaturized as compared with a configuration in which two external gears are engaged. Therefore, the drive device 2 can be easily miniaturized.
　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。第１クラッチは、モータシャフトとポンプ部との接続および切断を切り換えられるならば、特に限定されない。第２クラッチは、ポンプ駆動シャフトとポンプ部との接続および切断を切り換えられるならば、特に限定されない。第１クラッチおよび第２クラッチは、例えば、電磁クラッチでもよい。また、第２クラッチは、設けられなくてもよい。 The present invention is not limited to the above-described embodiment, and other configurations can be adopted. The first clutch is not particularly limited as long as connection and disconnection of the motor shaft and the pump unit can be switched. The second clutch is not particularly limited as long as connection and disconnection between the pump drive shaft and the pump portion can be switched. The first clutch and the second clutch may be, for example, an electromagnetic clutch. Also, the second clutch may not be provided.
　また、第２実施形態のように第１クラッチを遠心クラッチとする場合、第１クラッチは、モータシャフトの回転速度が所定速度よりも小さい場合にモータシャフトとポンプ部とを接続し、かつ、モータシャフトの回転速度が所定速度以上の場合に、モータシャフトとポンプ部との接続を切断する構成であってもよい。この構成によれば、モータシャフトの回転速度が高速になった際にモータシャフトとポンプ部との接続を切断することができ、ポンプ部が高速で駆動されることを抑制できる。これにより、ポンプ部にキャビテーションが生じることを抑制でき、モータシャフトの回転状態によらずポンプ部を安定して駆動できる。また、キャビテーションはポンプ部の容量が比較的大きい場合に生じやすい。これに対して、この構成によれば、キャビテーションを抑制できるため、ポンプ部の容量を大きくしやすい。 When the first clutch is a centrifugal clutch as in the second embodiment, the first clutch connects the motor shaft and the pump portion when the rotational speed of the motor shaft is smaller than a predetermined speed, and the motor The motor shaft and the pump unit may be disconnected when the rotational speed of the shaft is equal to or higher than a predetermined speed. According to this configuration, when the rotational speed of the motor shaft becomes high, the connection between the motor shaft and the pump unit can be disconnected, and the pump unit can be suppressed from being driven at high speed. Thus, the occurrence of cavitation in the pump portion can be suppressed, and the pump portion can be stably driven regardless of the rotational state of the motor shaft. In addition, cavitation is likely to occur when the volume of the pump portion is relatively large. On the other hand, according to this configuration, cavitation can be suppressed, and the capacity of the pump unit can be easily increased.
　ポンプ部は、収容部に貯留されたオイルＯをロータとステータとの少なくとも一方に送れればよい。すなわち、ポンプ部は、ロータとステータとのいずれか一方のみにオイルＯを送る構成であってもよい。ポンプ部の構成は、収容部に貯留されたオイルＯをロータとステータとの少なくとも一方に供給できるならば、特に限定されない。各外歯歯車の歯部の歯形および内歯歯車の歯部の歯形は、サイクロイド歯形であってもよいし、インボリュート歯形であってもよい。 The pump unit may send the oil O stored in the storage unit to at least one of the rotor and the stator. That is, the pump unit may be configured to feed the oil O to only one of the rotor and the stator. The configuration of the pump unit is not particularly limited as long as the oil O stored in the storage unit can be supplied to at least one of the rotor and the stator. The tooth profile of the teeth of each external gear and the tooth profile of the teeth of the internal gear may be cycloid or involute.
　なお、上述した実施形態の駆動装置の用途は、特に限定されない。上述した実施形態の駆動装置は、例えば、車両に搭載される。また、上述した各構成は、相互に矛盾しない範囲内において、適宜組み合わせることができる。 In addition, the application of the drive device of embodiment mentioned above is not specifically limited. The drive device of the embodiment described above is mounted on, for example, a vehicle. Moreover, each structure mentioned above can be combined suitably in the range which does not contradiction mutually.
　１，２…駆動装置、１０…ハウジング、１１…収容部、２０…ロータ、２１…モータシャフト、２１ａ，２１ｂ…貫通孔、３０…ステータ、４０，１４０…ポンプ部、４１…第１外歯歯車（第１回転部）、４２…第２外歯歯車（第２回転部）、４３，１４３…ポンプ室、４４，１４４…吸入口、４５，１４５…吐出口、５０，１５０…ポンプ駆動部、５１，１５１…ポンプ駆動シャフト、６１…第１油路、６２…第２油路、７１，１７１…第１クラッチ、７２，１７２…第２クラッチ、１４１…第３外歯歯車（第１回転部，第２回転部）、１４２…内歯歯車、Ｊ１…中心軸（回転軸）、Ｊ２…回転軸、Ｏ…オイル 1, 2 ... drive device, 10 ... housing, 11 ... housing part, 20 ... rotor, 21 ... motor shaft, 21a, 21b ... through hole, 30 ... stator, 40, 140 ... pump part, 41 ... first external gear (First rotating portion) 42: second external gear (second rotating portion) 43, 143: pump chamber 44, 144: suction port 45, 145: discharge port 50, 150: pump drive portion 51, 151 ... pump drive shaft, 61 ... first oil path, 62 ... second oil path, 71, 171 ... first clutch, 72, 172 ... second clutch, 141 ... third external gear (first rotating portion) , Second rotating portion), 142: internal gear, J1: central axis (rotational axis), J2: rotational axis, O: oil

Claims (10)

  1. 　一方向に延びる中心軸に沿って配置されるモータシャフトを有するロータと、
    　前記ロータと径方向に隙間を介して対向するステータと、
    　前記ロータおよび前記ステータを収容するとともにオイルを貯留可能な収容部を有するハウジングと、
    　前記モータシャフトを介して駆動され、前記収容部に貯留されたオイルを前記ロータと前記ステータとの少なくとも一方に送るポンプ部と、
    　前記モータシャフトと前記ポンプ部との接続および切断を切り換える第１クラッチと、
    　ポンプ駆動シャフトを有し、前記ポンプ駆動シャフトを介して前記ポンプ部を駆動可能なポンプ駆動部と、
    　を備える、駆動装置。     A rotor having a motor shaft disposed along a central axis extending in one direction;
    A stator that faces the rotor in the radial direction via a gap;
    A housing that accommodates the rotor and the stator and has an accommodation portion capable of storing oil;
    A pump unit driven via the motor shaft to deliver the oil stored in the storage unit to at least one of the rotor and the stator;
    A first clutch that switches connection and disconnection between the motor shaft and the pump unit;
    A pump drive unit having a pump drive shaft and capable of driving the pump unit via the pump drive shaft;
    A drive device comprising:
  2. 　前記ポンプ部は、前記第１クラッチを介して前記モータシャフトに取り付けられる第１回転部を有し、
    　前記第１クラッチは、ワンウェイクラッチであり、前記第１回転部に対する前記モータシャフトの前記中心軸周りの相対回転のうち、一方の向きの相対回転を阻止し、他方の向きの相対回転を許容する、請求項１に記載の駆動装置。     The pump unit has a first rotating unit attached to the motor shaft via the first clutch,
    The first clutch is a one-way clutch, which prevents relative rotation in one direction among relative rotations around the central axis of the motor shaft with respect to the first rotating portion, and allows relative rotation in the other direction. The drive device according to claim 1.
  3. 　前記第１クラッチは、遠心クラッチである、請求項１に記載の駆動装置。 The drive device according to claim 1, wherein the first clutch is a centrifugal clutch.
  4. 　前記第１クラッチは、前記モータシャフトの回転速度が所定速度以上の場合に前記モータシャフトと前記ポンプ部とを接続し、前記モータシャフトの回転速度が前記所定速度よりも小さい場合に、前記モータシャフトと前記ポンプ部との接続を切断する、請求項３に記載の駆動装置。 The first clutch connects the motor shaft and the pump portion when the rotational speed of the motor shaft is equal to or higher than a predetermined speed, and the motor shaft when the rotational speed of the motor shaft is smaller than the predetermined speed. The drive device according to claim 3, which disconnects the connection between the pump unit and the pump unit.
  5. 　前記第１クラッチは、前記モータシャフトの回転速度が所定速度よりも小さい場合に前記モータシャフトと前記ポンプ部とを接続し、前記モータシャフトの回転速度が前記所定速度以上の場合に、前記モータシャフトと前記ポンプ部との接続を切断する、請求項３に記載の駆動装置。 The first clutch connects the motor shaft and the pump portion when the rotational speed of the motor shaft is smaller than a predetermined speed, and the motor shaft when the rotational speed of the motor shaft is equal to or higher than the predetermined speed. The drive device according to claim 3, which disconnects the connection between the pump unit and the pump unit.
  6. 　前記ポンプ駆動シャフトと前記ポンプ部との接続および切断を切り換える第２クラッチをさらに備える、請求項１から５のいずれか一項に記載の駆動装置。 The drive device according to any one of claims 1 to 5, further comprising a second clutch that switches connection and disconnection between the pump drive shaft and the pump portion.
  7. 　前記ポンプ部は、前記第２クラッチを介して前記ポンプ駆動シャフトに取り付けられる第２回転部を有し、
    　前記第２クラッチは、ワンウェイクラッチであり、前記第２回転部に対する前記ポンプ駆動シャフトの回転軸周りの相対回転のうち、一方の向きの相対回転を阻止し、他方の向きの相対回転を許容する、請求項６に記載の駆動装置。     The pump unit has a second rotating unit attached to the pump drive shaft via the second clutch,
    The second clutch is a one-way clutch, which prevents relative rotation in one direction out of relative rotation around the rotation axis of the pump drive shaft with respect to the second rotation portion, and allows relative rotation in the other direction. The driving device according to claim 6.
  8. 　前記ポンプ部は、
    　　前記モータシャフトの回転が前記第１クラッチを介して伝達される第１外歯歯車と、
    　　前記第１外歯歯車と噛み合い、前記ポンプ駆動部の回転が伝達される第２外歯歯車と、
    　　前記第１外歯歯車および前記第２外歯歯車を収容するポンプ室と、
    　を有する、請求項１から７のいずれか一項に記載の駆動装置。     The pump unit is
    A first external gear, to which rotation of the motor shaft is transmitted via the first clutch;
    A second external gear engaged with the first external gear and to which the rotation of the pump drive is transmitted;
    A pump chamber accommodating the first external gear and the second external gear;
    The drive device according to any one of claims 1 to 7, comprising:
  9. 　前記ポンプ部は、
    　　前記モータシャフトの回転が前記第１クラッチを介して伝達される第３外歯歯車と、
    　　前記第３外歯歯車の径方向外側を囲み、前記第３外歯歯車と噛み合う内歯歯車と、
    　　前記第３外歯歯車および前記内歯歯車を収容するポンプ室と、
    　を有し、
    　前記ポンプ駆動シャフトの回転は、前記第３外歯歯車に伝達される、請求項１から７のいずれか一項に記載の駆動装置。     The pump unit is
    A third external gear, wherein rotation of the motor shaft is transmitted through the first clutch;
    An internal gear that surrounds the radially outer side of the third external gear and meshes with the third external gear;
    A pump chamber for accommodating the third external gear and the internal gear;
    Have
    The drive according to any one of claims 1 to 7, wherein the rotation of the pump drive shaft is transmitted to the third external gear.
  10. 　前記ポンプ部は、
    　　前記ハウジングに設けられるポンプ室と、
    　　前記ポンプ室内にオイルを吸入可能な吸入口と、
    　　前記ポンプ室内からオイルを吐出可能な吐出口と、
    　を有し、
    　前記ハウジングは、前記吐出口と繋がる第１油路を有し、
    　前記モータシャフトは、
    　　前記モータシャフトの内部に設けられ、前記第１油路と繋がる第２油路と、
    　　前記第２油路と前記モータシャフトの外周面とを繋ぐ貫通孔と、
    　を有する、請求項１から９のいずれか一項に記載の駆動装置。     The pump unit is
    A pump chamber provided in the housing;
    A suction port capable of sucking oil into the pump chamber;
    A discharge port capable of discharging oil from the pump chamber;
    Have
    The housing has a first oil passage connected to the discharge port,
    The motor shaft is
    A second oil passage provided inside the motor shaft and connected to the first oil passage;
    A through hole connecting the second oil passage and the outer peripheral surface of the motor shaft;
    The drive device according to any one of claims 1 to 9, comprising:
PCT/JP2018/033792 2017-09-27 2018-09-12 Drive device WO2019065240A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008174069A (en) * 2007-01-18 2008-07-31 Mazda Motor Corp Wheel driving device
JP2016065616A (en) * 2014-09-25 2016-04-28 Ntn株式会社 In-wheel motor drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008174069A (en) * 2007-01-18 2008-07-31 Mazda Motor Corp Wheel driving device
JP2016065616A (en) * 2014-09-25 2016-04-28 Ntn株式会社 In-wheel motor drive

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