WO2023238579A1 - ユニット - Google Patents

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Publication number
WO2023238579A1
WO2023238579A1 PCT/JP2023/017459 JP2023017459W WO2023238579A1 WO 2023238579 A1 WO2023238579 A1 WO 2023238579A1 JP 2023017459 W JP2023017459 W JP 2023017459W WO 2023238579 A1 WO2023238579 A1 WO 2023238579A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
case
shaft
bearing
planetary gear
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2023/017459
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
篤志 前田
稔 菖一
弘樹 上原
明 諏訪林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JATCO Ltd
Original Assignee
JATCO Ltd
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 JATCO Ltd filed Critical JATCO Ltd
Priority to JP2024526310A priority Critical patent/JP7701564B2/ja
Priority to CN202380044872.5A priority patent/CN119317551A/zh
Priority to EP23818224.0A priority patent/EP4538088A4/en
Publication of WO2023238579A1 publication Critical patent/WO2023238579A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0806—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts
    • F16H37/0813—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts with only one input shaft
    • F16H37/082—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts with only one input shaft and additional planetary reduction gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/04—Combinations of toothed gearings only
    • F16H37/041—Combinations of toothed gearings only for conveying rotary motion with constant gear ratio

Definitions

  • the present invention relates to a unit.
  • Patent Document 1 discloses a unit including a speed reduction mechanism.
  • An object of the present invention is to provide a unit that can contribute to miniaturization.
  • a rotating electric machine, a planetary gear mechanism connected downstream of the rotating electric machine, a first gear connected downstream of the planetary gear mechanism, and a second gear meshing with the first gear a gear, and a third gear connected downstream of the second gear, the rotating electric machine, the planetary gear mechanism, and the first gear are arranged on a first shaft, and the second gear and the third gear are arranged on a first shaft.
  • a unit is provided in which the third gear is disposed on the second shaft, and the third gear has a portion sandwiched between the planetary gear mechanism and the second gear.
  • FIG. 1 is a schematic configuration diagram of a unit according to this embodiment.
  • FIG. 2 is a longitudinal sectional view showing the positional relationship between the inverter and the planetary gear mechanism.
  • FIG. 1 is a schematic configuration diagram of a unit 1 according to the present embodiment.
  • FIG. 2 is a longitudinal sectional view showing the positional relationship between the inverter 4 and the planetary gear mechanism 51.
  • the unit 1 shown in FIGS. 1 and 2 is used to drive drive wheels (not shown) of a vehicle, but is not limited to this, and may be used, for example, to drive an electrical appliance.
  • the unit 1 is also called a motor unit (a unit having at least a motor), a power transmission device (a device having at least a power transmission mechanism (for example, a gear mechanism and/or a differential gear mechanism), etc.).
  • a device (unit) having a motor and a power transmission mechanism belongs to the concepts of both a motor unit and a power transmission device.
  • the unit 1 includes a housing 2, a motor 3 as a rotating electric machine, an inverter 4, a reduction gear group 5 as a power transmission mechanism, and a drive shaft 6.
  • the housing 2 is a housing member that houses the motor 3, the inverter 4, the reduction gear group 5, and the drive shaft 6.
  • the housing 2 is composed of one or more cases. Specifically, the housing 2 includes a first case 21, a second case 22, a third case 23 as a third wall, a fourth case 24, and a fifth case 25 (see FIG. 2).
  • the first case 21 is 3in1.
  • 3in1 means a type in which a part of the motor case that accommodates the motor 3 and the drive shaft 6 and a part of the inverter case that accommodates the inverter 4 are integrally formed.
  • the first case 21 includes a tube 211 that is open at least at a front end, a front flange 212 that is provided at the front end of the tube 211 so as to protrude toward the outer circumference, and a front flange 212 that is the other end of the tube 211. It has a rear flange 213 provided so as to protrude toward the outer circumferential side at the rear end, and a support frame 214 arranged on the inner circumferential side of the tube 211 so as to be located at the rear end of the tube 211 .
  • the axial direction X means the axial direction X of the rotating shaft of the parts that constitute the unit 1.
  • the parts include, for example, a motor 3, a gear mechanism, a differential gear mechanism, and the like.
  • the support frame 214 includes an annular wall 214a as a first wall portion that fixes a ring gear 513 of a planetary gear mechanism 51, which will be described later, in the reduction gear group 5, and a bearing B1 located on the front end side of the cylinder 211 than the annular wall 214a.
  • a first support wall 214b disposed to support the annular wall 214a in the lateral direction Y as the first radial direction and a second wall disposed so as to support the bearing B2 as the first bearing. It has a second support wall 214c.
  • the first support wall 214b supports the rear end as the other end of the rotating shaft 31 of the motor 3, which will be described later, via a bearing B1.
  • the second support wall 214c supports a front end as one end of a differential gear 56 as a differential gear mechanism (described later) of the reduction gear group 5 (specifically, a front end of a differential case 561 of the differential gear 56 (described later)) via a bearing B2. It is rotatably supported.
  • annular wall 214a, the first support wall 214b, and the second support wall 214c are integrally formed. This makes it possible to suppress an increase in the number of parts without forming the parts constituting the support frame 214 individually.
  • the second case 22 is connected to the front end of the tube 211 of the first case 21. Specifically, the outer periphery of the second case 22 is connected to the front flange 212 by bolting. Further, the second case 22 supports both bearings B3 and B4. The second case 22 covers both the front end as one end of the rotating shaft 31 of the motor 3 and the front end as one end of the drive shaft 6 (specifically, the first drive shaft 61 constituting the drive shaft 6). It is rotatably supported via bearings B3 and B4.
  • the third case 23 is arranged on the inner peripheral side of the cylinder 211 so as to be located at the rear end of the cylinder 211.
  • the third case 23 is formed separately from the support frame 214. Further, the third case 23 is connected to a support frame 214. Specifically, the outer periphery of the third case 23 is connected to the rear end of the annular wall 214a of the support frame 214 by bolting so as to be located within the first case 21.
  • the third case 23 includes a bearing B5 as a second bearing that supports a front end as one end of the first shaft 7 that rotates integrally with a first gear 52 of the reduction gear group 5, which will be described later, and a bearing B5 as a second bearing that supports the front end as one end of the first shaft 7 that rotates integrally with the first gear 52 of the reduction gear group 5, which will be described later.
  • a bearing B6 as a third bearing that supports the front end as one end of the second shaft 8 that rotates integrally with the third gear 54 is supported.
  • the third case 23 rotatably supports the front end of the first shaft 7 and the front end of the second shaft 8 via bearings B5 and B6, respectively.
  • the fourth case 24 houses the reduction gear group 5.
  • the fourth case 24 is constituted by a bottomed tube that is open at one front end and closed at the other rear end. Further, the fourth case 24 is connected to the rear end of the tube 211. Specifically, the outer periphery of the front end of the fourth case 24 is connected to the rear flange 213 by tightening bolts.
  • the fourth case 24 includes a bearing B7 that supports the rear end as the other end of the first shaft 7, a bearing B8 that supports the rear end as the other end of the second shaft 8, and a bearing B8 as the other end of the differential gear 56.
  • a bearing B9 that supports the rear end (specifically, the rear end of the differential case 551) is supported.
  • the fourth case 24 rotatably supports the rear end of the first shaft 7, the rear end of the second shaft 8, and the rear end of the differential gear 56 via bearings B7, B8, and B9, respectively. .
  • Bearing B3, bearing B1, bearing B5, and bearing B7 are arranged in order from the front side to the rear side in the axial direction X.
  • the bearing B6 and the bearing B8 are arranged in order from the front side to the rear side in the axial direction X.
  • Bearing B4, bearing B2, and bearing B9 are arranged in order from the front side to the rear side in the axial direction X.
  • Bearing B2 is arranged between bearing B1 and bearing B5.
  • Bearing B9 is arranged between bearing B5 (or B6) and bearing B7 (or B8).
  • the fifth case 25 is surrounded by the tube 211, the front flange 212, and the rear flange 213 of the first case 21, and closes the opening of the inverter housing chamber S1 that accommodates the inverter 4.
  • the fifth case 25 is connected to the front flange 212, rear flange 213, etc. by bolting.
  • the motor 3 is a rotating electrical machine that has an electric motor function and/or a generator function. Further, the motor 3 has a rotating shaft 31 that is rotatably supported by the first case 21 and the second case 22 via bearings B3 and B1, and is located on the outer peripheral side of the rotating shaft 31 and rotates integrally with the rotating shaft 31. It has a rotor 32 and a stator 33 fixed to the inner circumferential side of the cylinder 211 so as to be located on the outer circumferential side of the rotor 32.
  • the inverter 4 is a controller for controlling the drive of the motor 3.
  • the inverter 4 is housed in the inverter housing chamber S1 so as to extend along the axial direction X.
  • the reduction gear group 5 is a power transmission mechanism that reduces the power of the motor 3 and transmits it to the drive shaft 6, and is composed of a plurality of gears.
  • the reduction gear group 5 is dynamically connected to the downstream side of the motor 3 and the upstream side of the drive shaft 6 . Further, the reduction gear group 5 is accommodated in a reduction gear group housing chamber S2 formed by the first case 21, third case 23, and fourth case 24 that are connected.
  • the reduction gear group 5 includes a planetary gear mechanism 51, a first gear 52, a second gear 53, and a third gear 54 as a first element or a second element, which are arranged in order from upstream to downstream. , a fourth gear 55 and a differential gear 56.
  • the power from the motor 3 is transmitted to the drive shaft 6 via the planetary gear mechanism 51, the first gear 52, the second gear 53, the third gear 54, the fourth gear 55, and the differential gear 56 in this order.
  • a second element (part, part, etc.) connected upstream of the first element (part, part, etc.) means that the first element and the second element are connected so that power can be transmitted.
  • the power input side is upstream, and the power output side is downstream. Further, the connection may be made via another mechanism (for example, a clutch, another gear mechanism, etc.).
  • the planetary gear mechanism 51 is connected downstream of the motor 3.
  • the planetary gear mechanism 51 is housed on the inner peripheral side of the annular wall 214a so that its front side and rear side face the first support wall 214b and the third case 23, respectively. That is, the planetary gear mechanism 51 is arranged in a region surrounded by the annular wall 214a, the first support wall 214b, and the third case 23.
  • the planetary gear mechanism 51 is attached to the annular wall 214a, the third case 23, the first gear 52, the second gear 53, the third gear 54, etc., which are separate from the first case 21, can be attached. Therefore, it is possible to create a case structure that is easy to assemble.
  • the planetary gear mechanism 51 is located only in the area inside the first case 21 and not in the area inside the fourth case 24, the planetary gear mechanism 51 is located in the area inside the fourth case 24.
  • the first gear 52 and the second gear 53 can be arranged closer to the motor 3 side in the axial direction X. As a result, it is possible to contribute to miniaturization of the unit 1 (particularly in the axial direction X).
  • the planetary gear mechanism 51 overlaps with the inverter housing chamber S1. That is, the planetary gear mechanism 51 and the inverter housing chamber S1 are lined up in the vertical direction Z, which is a second radial direction orthogonal to the horizontal direction Y.
  • the inverter housing chamber S1 has a portion that overlaps with the planetary gear mechanism 51 when viewed in the radial direction.
  • a space is created radially outward of the space in which the planetary gear mechanism 51 is arranged, and by forming the inverter housing chamber S1 in this space, the space can be used effectively, making the overall unit 1 smaller. It is possible to contribute to the development of
  • the planetary gear mechanism 51 includes a sun gear 511, a carrier 512, and a ring gear 513.
  • a pinion gear group 514 that meshes with both sun gear 511 and ring gear 513 is arranged between sun gear 511 and ring gear 513.
  • the ring gear 513 is fixed to the inner periphery of the annular wall 214a in a non-rotatable manner.
  • the pinion gear group 514 is rotatably supported by the carrier 512.
  • the sun gear 511 is connected to the rear end of the rotating shaft 31 so as to rotate integrally with the rotating shaft 31.
  • the carrier 512 is connected to the front end of the first shaft 7 so as to rotate together with the first shaft 7.
  • the first shaft 7 is rotatably supported by the third case 23 and the fourth case 24 via bearings B5 and B7.
  • the axis of the rotating shaft 31 and the axis of the first shaft 7 are both an axis C1 serving as the first axis.
  • the first gear 52 is connected downstream of the planetary gear mechanism 51 so as to be closer to the bearing B7 than the bearing B5.
  • the first gear 52 is formed on the outer periphery of the first shaft 7 so as to rotate together with the first shaft 7.
  • the motor 3, the planetary gear mechanism 51, and the first gear 52 are arranged coaxially with the axis C1. Thereby, by providing the planetary gear mechanism 51 coaxially between the first gear 52 as the first stage gear and the motor 3, it is possible to suppress the unit 1 from expanding in the radial direction.
  • the second gear 53 meshes with the first gear 52.
  • the second gear 53 has a larger number of teeth than the first gear 52, and forms a first reduction gear stage together with the first gear 52.
  • the second gear 53 is connected to the outer periphery of the second shaft 8 so as to rotate together with the second shaft 8.
  • the second shaft 8 is rotatably connected to the third case 23 and the third case 23 through bearings B6 and B8 so as to be parallel to the first shaft 7 and located between the first shaft 7 and the drive shaft 6. 4 cases 24.
  • the third gear 54 is connected downstream of the second gear 53 so as to be closer to the bearing B6 than the bearing B8.
  • the third gear 54 is formed on the outer periphery of the second shaft 8 so as to rotate together with the second shaft 8. That is, the second gear 53 and the third gear 54 are arranged coaxially with the axis C2 of the second shaft 8 serving as the second shaft.
  • the third gear 54 is located between the planetary gear mechanism 51 and the second gear 53. That is, the third gear 54 has a portion sandwiched between the planetary gear mechanism 51 and the second gear 53. Thereby, compared to a configuration in which the second gear 53 is located between the planetary gear mechanism 51 and the third gear 54, it is possible to suppress the unit 1 from expanding in the axial direction .
  • the planetary gear mechanism 51 overlaps the second gear 53 and the third gear 54 when viewed in the axial direction. That is, the planetary gear mechanism 51, the second gear 53, and the third gear 54 are lined up in the axial direction X.
  • the planetary gear mechanism 51 has a portion that overlaps the second gear 53 and the third gear 54 when viewed in the axial direction. Thereby, the space of the reduction gear group housing chamber S2 can be effectively utilized, which can contribute to downsizing of the unit 1 as a whole.
  • the fourth gear 55 meshes with the third gear 54.
  • the fourth gear 55 has a larger number of teeth than the third gear 54, and forms a second reduction gear stage together with the third gear 54.
  • a first gear 52 and a second gear 53, and a third gear 54 and a fourth gear 55 perform two-step deceleration. Thereby, in securing the reduction ratio, the diameter of the reduction gear can be made smaller than in one-stage reduction.
  • the differential gear 56 is connected downstream of the fourth gear 55.
  • the differential gear 56 includes a differential case 561 and a differential portion 562.
  • the differential case 561 accommodates a differential portion 562.
  • the differential case 561 is rotatably supported by the first case 21 and the fourth case 24 via bearings B2 and B9. Further, the differential case 561 is connected to the inner periphery of the fourth gear 55 so as to rotate together with the fourth gear 55.
  • the differential section 562 transmits the power transmitted to the differential case 561 via the fourth gear 55 to the drive shaft 6.
  • the drive shaft 6 rotates together with the drive wheels of the vehicle.
  • the drive shaft 6 is connected downstream of the differential gear 56 so as to be parallel to the rotating shaft 31.
  • the drive shaft 6 includes a first drive shaft 61 connected to one drive wheel, and a second drive shaft 62 connected to the other drive wheel. Both the axis of the first drive shaft 61 and the axis of the second drive shaft 62 are an axis C3 as a third axis.
  • the fourth gear 55 and the differential gear 56 are arranged coaxially with the axis C3.
  • the differential gear 56 is arranged closer to the planetary gear mechanism 51 than the fourth gear 55 is. That is, the differential gear 56 has a portion located between the planetary gear mechanism 51 and the fourth gear 55.
  • the differential gear 56 overlaps the third case 23 when viewed in the radial direction. That is, the differential gear 56 and the third case 23 are lined up in the lateral direction Y.
  • the differential gear 56 has a portion that overlaps with the third case 23 when viewed in the radial direction.
  • an opening as a space surrounded by the first case 21 and the third case 23 is generated on the radially outer side of the space in which the third case 23 is arranged, and the differential gear 56 is forced to pass through the opening. (that is, by arranging the differential gear 56 in both the area within the first case 21 and the area within the fourth case 24), the space created by the opening can be effectively utilized.
  • it can contribute to miniaturization of the unit 1 (particularly in the axial direction X).
  • the speed ratio and the reduction ratio are inversely proportional, the reduction ratio becomes smaller
  • the maximum torque required for the motor 3 can be reduced, and the motor This can contribute to the miniaturization of 3.
  • the number of decelerations was increased by adding the planetary gear mechanism 51, so the differential diameter (proportional to the diameter of the fourth gear 55 as a reduction gear that rotates integrally with the differential gear 56) can be made smaller, making layout easier.
  • the unit 1 includes a motor 3 (rotating electric machine), a planetary gear mechanism 51 connected downstream of the motor 3 (rotating electric machine), and a first planetary gear mechanism 51 connected downstream of the planetary gear mechanism 51.
  • 52 is arranged on the axis C1 (first axis)
  • the second gear 53 and the third gear 54 are arranged on the axis C2 (second axis)
  • the third gear 54 is arranged on the axis C1 (second axis). 2 gear 53.
  • the unit 1 further includes a fourth gear 55 that meshes with the third gear 54, a differential gear 56 connected downstream of the fourth gear 55, and a drive shaft 6 connected downstream of the differential gear 56.
  • the fourth gear 55 and the differential gear 56 are arranged on the axis C3, and the differential gear 56 is arranged closer to the planetary gear mechanism 51 than the fourth gear 55 is.
  • a space is generated radially outward of the space in which the planetary gear mechanism 51 is arranged, and by arranging the differential gear 56 in this space, the space can be used effectively. It can contribute to miniaturization.
  • the unit 1 includes an annular wall 214a (first wall portion) that fixes the ring gear 513 of the planetary gear mechanism 51, and a second support wall that supports the bearing B2 (first bearing) on which the differential gear 56 is supported.
  • 214c second wall part
  • the annular wall 214a (first wall part) and the second support wall 214c (second wall part) are integrally formed.
  • the unit 1 further includes a third case 23 (third wall) that faces the planetary gear mechanism 51, and the third case 23 (third wall) includes an annular wall 214a (first wall) and The third case 23 (third wall) is formed separately from the second support wall 214c (second wall), and includes a bearing B5 (second A bearing B6 (third bearing) that supports the second shaft 8 that rotates integrally with the third gear 54 is supported.
  • the third case 23 which is separate from the first case 21, the first gear 52, the second gear 53, the third gear 54, etc. Since it can be attached, it is possible to create a case structure that is easy to assemble.
  • the unit 1 further includes an inverter 4, and the inverter housing chamber S1 that accommodates the inverter 4 has a portion that overlaps with the planetary gear mechanism 51 when viewed in the radial direction.
  • a space is generated radially outward of the space in which the planetary gear mechanism 51 is arranged, and by forming the inverter housing chamber S1 in the space, the space can be effectively utilized. It can contribute to overall miniaturization.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Retarders (AREA)
  • General Details Of Gearings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
PCT/JP2023/017459 2022-06-09 2023-05-09 ユニット Ceased WO2023238579A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2024526310A JP7701564B2 (ja) 2022-06-09 2023-05-09 ユニット
CN202380044872.5A CN119317551A (zh) 2022-06-09 2023-05-09 组件
EP23818224.0A EP4538088A4 (en) 2022-06-09 2023-05-09 UNIT

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-093644 2022-06-09
JP2022093644 2022-06-09

Publications (1)

Publication Number Publication Date
WO2023238579A1 true WO2023238579A1 (ja) 2023-12-14

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Application Number Title Priority Date Filing Date
PCT/JP2023/017459 Ceased WO2023238579A1 (ja) 2022-06-09 2023-05-09 ユニット

Country Status (4)

Country Link
EP (1) EP4538088A4 (https=)
JP (1) JP7701564B2 (https=)
CN (1) CN119317551A (https=)
WO (1) WO2023238579A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10325456A (ja) * 1997-05-26 1998-12-08 Aichi Mach Ind Co Ltd 車両用パワートレーンのエアブリーザ構造
WO2020183787A1 (ja) * 2019-03-10 2020-09-17 ジヤトコ株式会社 動力伝達装置
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