WO2020209244A1 - Unité de moteur - Google Patents

Unité de moteur Download PDF

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Publication number
WO2020209244A1
WO2020209244A1 PCT/JP2020/015621 JP2020015621W WO2020209244A1 WO 2020209244 A1 WO2020209244 A1 WO 2020209244A1 JP 2020015621 W JP2020015621 W JP 2020015621W WO 2020209244 A1 WO2020209244 A1 WO 2020209244A1
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WO
WIPO (PCT)
Prior art keywords
motor
inverter
case
housing
case portion
Prior art date
Application number
PCT/JP2020/015621
Other languages
English (en)
Japanese (ja)
Inventor
大介 小笠原
山本　和志
村上　淳
浩毅 赤石
修平 中松
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
Publication of WO2020209244A1 publication Critical patent/WO2020209244A1/fr

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Classifications

    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to a motor unit.
  • the present application claims priority based on Japanese Patent Application No. 2019-075799 filed on April 11, 2019, the contents of which are incorporated herein by reference.
  • a drive device in which an inverter case is attached to a drive device case is known.
  • the drive device of Patent Document 1 has a structure in which an inverter is fixed to a top wall via a support and a control device is fixed to a mounting portion.
  • the vibration of the motor housing is transmitted to the inverter case, and the inverter case itself deforms and vibrates, which may cause noise.
  • One aspect of the present invention is intended to reduce noise caused by an inverter case.
  • the motor unit controls a motor having a rotor rotatable about a motor shaft, a stator located radially outside the rotor, and a current supplied to the motor. It includes an inverter and an inverter case for accommodating the inverter.
  • the inverter case has a first case portion and a second case portion.
  • the first case portion and the second case portion each have a flange portion.
  • the first case portion and the second case portion are fixed by the flange portion.
  • At least one of the first case portion and the second case portion has ribs extending toward the respective flange portions.
  • a motor unit capable of realizing miniaturization is provided.
  • FIG. 1 is a perspective view of the motor unit of one embodiment.
  • FIG. 2 is a perspective view of the other side of the motor housing of one embodiment.
  • FIG. 3 is a one-side perspective view of the motor housing of one embodiment.
  • FIG. 4 is a side view of the motor unit of one embodiment.
  • FIG. 5 is a side sectional view of the motor unit of one embodiment.
  • FIG. 6 is a top perspective view of the motor unit of one embodiment.
  • FIG. 7 is a schematic configuration diagram of the motor unit of one embodiment.
  • FIG. 8 is a side perspective view of the motor unit having the rib configuration of the modified example.
  • the direction of gravity will be defined based on the positional relationship when the motor unit 1 is mounted on a vehicle located on a horizontal road surface.
  • the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate.
  • the Z-axis direction indicates the vertical direction (that is, the vertical direction)
  • the + Z direction is the upper side (opposite the gravity direction)
  • the ⁇ Z direction is the lower side (gravity direction).
  • the X-axis direction is a direction orthogonal to the Z-axis direction and indicates a front-rear direction of the vehicle on which the motor unit 1 is mounted.
  • the Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction, and indicates the width direction (left-right direction) of the vehicle.
  • the direction parallel to the motor shaft J2 of the motor 2 (Y-axis direction) is simply referred to as "axial direction”, and the radial direction centered on the motor shaft J2 is simply referred to as “diametrical direction”.
  • the circumferential direction centered on the motor shaft J2, that is, the circumference of the motor shaft J2 is simply referred to as the "circumferential direction”.
  • the "one side in the axial direction” is the positive side in the Y-axis direction (the Y1 side shown in FIGS. 1 and 3), and the “other side in the axial direction” is the negative side in the Y-axis direction (the other side in the Y-axis direction). (Y2 side shown in FIG. 2).
  • extending along a predetermined direction means that in addition to the case where it extends in a strictly predetermined direction, it is tilted in a range of less than 45 ° with respect to the exact direction. Including the case of extending in the direction.
  • the motor unit 1 is mounted on a vehicle powered by a motor, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and an electric vehicle (EV), and is used as the power source thereof. That is, the motor unit 1 is a drive device.
  • a motor such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and an electric vehicle (EV)
  • the motor unit 1 will be described with reference to FIGS. 1 to 7.
  • the motor unit 1 includes a motor (main motor) 2, a gear portion 3 including a speed reducer 4 and a differential device 5, a housing 6, an oil O housed in the housing 6, and the like. It includes an inverter 8 and an oil pump 9.
  • Oil O is a medium that circulates inside the motor.
  • another fluid such as water may be used as a medium. That is, the pump described later may be an oil-cooled pump or a water-cooled pump.
  • a storage space for accommodating the motor 2, the gear portion 3, and the inverter 8 is provided inside the housing 6.
  • the housing 6 holds the motor 2, the gear portion 3, and the inverter 8 in the accommodation space.
  • the motor 2 is housed in the housing 6.
  • the motor 2 includes a rotor that rotates about a motor shaft J2 that extends in the horizontal direction, a stator that is located radially outside the rotor, and a pair of bearings that rotatably support the rotor.
  • the motor 2 of this embodiment is an inner rotor type motor.
  • the rotor rotates when an alternating current is supplied from the battery (not shown) to the stator via the inverter 8.
  • the rotor has a shaft, a rotor core, and a plurality of rotor magnets.
  • the rotor ie, shaft, rotor core and rotor magnet
  • the torque of the rotor is transmitted to the gear portion 3.
  • the shaft extends along the axial direction around the motor shaft J2.
  • the shaft rotates about the motor shaft J2.
  • the gear portion 3 is housed in the housing 6.
  • the gear portion 3 is connected to the shaft on one side in the axial direction of the motor shaft J2.
  • the gear unit 3 has a speed reducing device 4 and a differential device 5.
  • the torque output from the motor 2 is transmitted to the differential device 5 via the speed reducer 4.
  • the speed reducer 4 is connected to the rotor of the motor 2.
  • the speed reduction device has a function of reducing the rotation speed of the motor 2 and increasing the torque output from the motor 2 according to the reduction ratio.
  • the speed reducing device 4 transmits the torque output from the motor 2 to the differential device 5.
  • the differential device 5 is connected to the motor 2 via the speed reducer 4.
  • the differential device 5 is a device for transmitting the torque output from the motor 2 to the wheels of the vehicle.
  • the differential device 5 is connected to an axle that extends along the central axis J1.
  • the differential device 5 has a function of transmitting the same torque to the axles of both the left and right wheels while absorbing the speed difference between the left and right wheels when the vehicle turns.
  • the housing 6 includes a motor housing 60, a motor cover 61, a gear housing 62, and an inverter housing 63.
  • the motor housing 60 accommodates a motor accommodating portion 6a having a motor chamber for accommodating the motor 2 inside, a gear accommodating portion 6b having a gear chamber for accommodating the gear portion 3 inside, a part of the inverter 8 and a connecting line. It has an inverter accommodating portion 6c having an inverter chamber inside.
  • the inverter accommodating portion 6c accommodates a connection line connecting the inverter 8 and the motor 2 and a part of the inverter 8. Further, the inverter accommodating portion 6c of the motor housing 60 may accommodate only the connecting line without the inverter 8.
  • the motor housing 60 includes a tubular peripheral wall portion 60a that surrounds the motor 2 from the outside in the radial direction, a first side plate portion 60b located on the other side (Y2 side in the drawing) of the peripheral wall portion 60a in the axial direction, and an axial direction of the peripheral wall portion 60a.
  • the second side plate portion 60c located on one side (Y1 side in the drawing), the first connecting plate portion 60d that connects the first side plate portion 60b and the second side plate portion 60c and faces the rear (-X side) of the vehicle, and the first The second connecting plate 60e that connects the one side plate 61b and the second side plate 60c and faces upward (+ Z side) in the direction of gravity, and the first side plate 61b and the second side plate extending upward from the peripheral wall 60a. It has a third connecting plate portion 60g that connects the portions 60c.
  • the first side plate portion 60b has a first partition wall 60ba, a first protruding portion 60bb, and a motor flange portion 60bc.
  • the motor flange portion 60bc surrounds the opening on the other side in the axial direction of the peripheral wall portion 60a and the periphery of the first partition wall 60ba.
  • the first protruding portion 60bb protrudes radially outward (rear side of the vehicle; ⁇ X side) from the motor flange portion 60bc.
  • the second side plate portion 60c has a second partition wall 60ca, a second overhanging portion 60cc, a second protruding portion 60cc, and a gear flange portion 60cd.
  • the gear flange portion 60cd surrounds the second partition wall 60ca and the second overhanging portion 60cc.
  • the second protruding portion 60cc projects upward (+ Z side) from the gear flange portion 60cd.
  • the second partition wall 60ca has a partition wall opening 68 through which the shaft of the motor 2 is passed.
  • the second partition wall 60ca has a recess 69 that opens on one surface of the second partition wall 60ca in the axial direction.
  • the bearing of the gear portion 3 is housed in the recess 69.
  • the motor housing 60 has a second partition wall 60ca that divides the internal accommodation space into a motor chamber and a gear chamber.
  • the motor housing 60 has a second overhanging portion 60cc that projects from the second partition wall 60ca to the rear side of the vehicle.
  • the second partition wall 60ca and the second overhanging portion 60cc form a part of the second side plate portion 60c.
  • the accommodation space of the motor housing 60 is divided into a motor chamber and an inverter chamber by a peripheral wall portion 60a and a first partition wall 60ba.
  • the first partition wall 60ba constitutes a part of the first side plate portion 60b.
  • the motor cover 61 is fixed to the outside (Y2 side) of the first side plate portion 60b.
  • the second partition wall 60ca, the peripheral wall portion 60a, and the motor cover 61 form a motor chamber, surround the motor, and house the motor. That is, the motor accommodating portion 6a is formed by the second partition wall 60ca and the peripheral wall portion 60a.
  • the motor accommodating portion 6a has a cylindrical shape that opens on the other side in the axial direction. The opening of the motor accommodating portion 6a is covered by the motor cover 61 facing the second partition wall 60ca.
  • the motor housing 60 has a motor flange portion 60bc connected to the motor cover 61. The motor flange portion 60bc projects to the other side in the axial direction with respect to the first partition wall 60ba.
  • the second partition wall 60ca, the second overhanging portion 60cc, and the gear housing 62 form a gear chamber, surround the gear portion 3, and accommodate the gear portion 3. That is, the gear accommodating portion 6b is formed by the second partition wall 60ca and the second overhanging portion 60cc.
  • the motor housing 60 has a gear flange portion 60cd connected to the gear housing 62. The gear flange portion 60cd projects on one side in the axial direction with respect to the second side plate portion 60c.
  • a part of the peripheral wall portion 60a, the second protruding portion 60cc, the first side plate portion 60b, the first connecting plate portion 60d, the second connecting plate portion 60e, the third connecting plate portion 60g, and the inverter housing 63 constitute an inverter chamber. Then, the inverter 8 is surrounded and the inverter 8 is housed. That is, the peripheral wall portion 60a, the second protruding portion 60cc, the first side plate portion 60b, the first connecting plate portion 60d, the second connecting plate portion 60e, and the third connecting plate portion 60g form the inverter accommodating portion 6c shown in FIG. Constitute.
  • the inverter accommodating portion 6c has a bottomed square tube shape that opens upward in the direction of gravity.
  • the opening of the inverter accommodating portion 6c is covered by the inverter housing 63 which faces the second connecting plate portion 60e and the peripheral wall portion 60a in the vertical direction.
  • the motor housing 60 has an inverter flange portion 60f connected to the inverter housing 63.
  • the inverter flange portion 60f is located at the open end portion of the inverter housing portion 6c.
  • the inverter flange portion 60f is a flange-shaped portion extending outward from the inverter housing portion 6c.
  • the motor housing 60 has an inverter flange portion 60f.
  • the inverter flange portion 60f is inclined when viewed from the vehicle width direction (Y-axis direction). That is, the inverter flange portion 60f is inclined with respect to the second connection plate portion 60e.
  • the inverter flange portion 60f is connected to the inverter housing 63.
  • the motor housing 60 is provided with an axle passage hole 67 through which a drive shaft (not shown) that supports the wheels passes.
  • the gear housing 62 is fixed to the gear flange portion 60cd.
  • the shape of the gear housing 62 is a concave shape that opens on the other side in the axial direction.
  • the opening of the gear housing 62 is covered with the second side plate portion 60c.
  • the space between the gear housing 62 and the second side plate portion 60c constitutes a gear chamber for accommodating the gear portion 3.
  • the inverter housing 63 is mounted integrally with the motor housing 60. More specifically, the inverter housing 63 is mounted integrally with the motor accommodating portion 6a.
  • the inverter housing 63 has a main body accommodating portion 63a and a mounting flange portion 63c.
  • the main body accommodating portion 63a projects in the Z-axis direction with respect to the mounting flange portion 63c. That is, the main body accommodating portion 63a overlaps with the inverter accommodating portion 6c when viewed from the direction orthogonal to the motor shaft J2.
  • the inverter housing 63 is fixed by the mounting flange portion 63c and the inverter flange portion 60f.
  • the opening of the main body accommodating portion 63a is covered with the peripheral wall portion 60a and the second connecting plate portion 60e.
  • the space between the inverter housing 63 and the motor housing 60 constitutes an inverter chamber for accommodating the inverter 8.
  • the inverter 8 is electrically connected to the motor.
  • the inverter 8 controls the current supplied to the motor.
  • the inverter housing 63 is provided with an inverter 8 and a cooling water channel 8b through which cooling water for cooling the inverter is passed.
  • the inverter 8 has a control element that controls the electric power supplied to the motor.
  • the control element is, for example, an IGBT.
  • the inverter housing 63 is a plate-shaped portion that extends in the horizontal direction.
  • the top surface of the top wall 8c in the direction of gravity is flat.
  • the mounting flange portion 63c of the inverter housing 63 and the inverter flange portion 60f of the motor housing 60 overlap.
  • the mounting flange portion 63c and the inverter flange portion 60f are in surface contact with each other.
  • a screw hole is provided in the inverter flange portion 60f.
  • the mounting flange portion 63c and the inverter flange portion 60f are fixed via the bolt fastening portion 10C.
  • the space between the inverter housing 63 and the inverter flange portion 60f is sealed with a sealing member (not shown) such as resin so that foreign matter does not enter between the inverter housing 63 and the inverter flange portion 60f. Therefore, the inverter housing 63 and the inverter flange portion 60f do not have to be in direct contact with each other.
  • the shape of the inverter flange portion 60f is a quadrangular shape when viewed from the upper side in the direction of gravity.
  • a part of the inverter 8 is located inside the inverter accommodating portion 6c.
  • a part of the inverter 8 is located below the upper end of the inverter flange portion 60f in the gravity direction and inside the frame-shaped portion of the inverter accommodating portion 6c seen from the upper side in the gravity direction.
  • the cooling water channel 8b is supported by the inverter housing 63.
  • a part of the cooling water channel 8b and the main body accommodating portion 63a of the inverter housing 63 are a part of a single member. If the portion covering the inverter 8 is box-shaped, the wall surface of the box tends to vibrate.
  • the inverter housing 63 support the cooling water channel 8b as in the above configuration, the weight of the cooling water channel 8b can be added to the top wall 8c of the inverter housing 63. Further, when there is cooling water in the cooling water channel 8b, the weight of the volume of the cooling water channel 8b can be added to the top wall 8c.
  • the cooling water channel 8b crosses the top wall 8c when viewed from the upper side in the direction of gravity, the same effect as providing the rib on the top wall 8c can be obtained. As a result, the top wall 8c can be made difficult to vibrate.
  • a part of the peripheral wall portion 60a, the second protruding portion 60cc, the first side plate portion 60b, the first connecting plate portion 60d, the second connecting plate portion 60e, the third connecting plate portion 60g, and the inverter housing 63 are , Inverter chamber is configured, the inverter 8 is surrounded, and the inverter 8 is housed. That is, a part of the peripheral wall portion 60a, the second protruding portion 60cc, the first side plate portion 60b, the first connecting plate portion 60d, the second connecting plate portion 60e, the third connecting plate portion 60g, and the inverter housing 63 are an inverter case. Consists of 10.
  • a part of the peripheral wall portion 60a, the second protruding portion 60cc, the first side plate portion 60b, the first connecting plate portion 60d, the second connecting plate portion 60e, and the third connecting plate portion 60g are configured separately from the motor housing 60. You may. That is, the inverter case 10 may be configured separately from the motor housing 60.
  • the inverter case 10 is composed of a first case portion 10a and a second case portion 10b.
  • the first case portion 10a is composed of a part of the peripheral wall portion 60a, a second protruding portion 60cc, a first side plate portion 60b, a first connecting plate portion 60d, a second connecting plate portion 60e, and a third connecting plate portion 60g.
  • the second case portion 10b is an inverter housing 63.
  • the first case portion 10a and the second case portion 10b each have a flange portion.
  • the first case portion 10a and the second case portion 10b are connected to each other via their respective flange portions.
  • the flange portion of the first case portion 10a is the mounting flange portion 63c
  • the flange portion of the second case portion 10b is the inverter flange portion 60f.
  • the first case portion 10a and the second case portion 10b are fastened and fixed by a plurality of bolts 13 which are fastening members.
  • the inverter case 10 is provided with ribs 11 on the inverter housing 63 and the first connection plate portion 60d of the motor housing 60.
  • the rib 11 extends in the vertical direction from the upper end portion of the main body accommodating portion 63a toward the mounting flange portion 63c.
  • the rib 11 extends in the vertical direction from the lower end portion of the first connecting plate portion 60d toward the inverter flange portion 60f.
  • the mounting flange portion 63c and the inverter flange portion 60f have higher rigidity than the peripheral flat surface portions (first connection plate portion 60d, main body housing portion 63a).
  • the ribs 11 may be provided alternately in the inverter housing 63 and the first connection plate portion 60d in the direction in which the flange portion of the inverter case 10 extends.
  • the inverter case 10 has a flat surface portion 10A facing the vehicle rear side at an end portion on the vehicle rear side ( ⁇ X side). Since the inverter case 10 is connected to the peripheral wall portion 60a that houses the motor 2, vibration caused by the rotational operation of the motor 2 is transmitted to the flat surface portion 10A of the inverter case 10. The vibration causes the flat surface portion 10A of the inverter case 10 to vibrate. In particular, the central portion of the flat surface portion 10A as seen from the rear side of the vehicle vibrates significantly.
  • a flange portion 10B (mounting flange portion 63c and an inverter flange portion 60f) extending in the horizontal direction is provided at the central portion in the vertical direction of the flat surface portion 10A.
  • the rib 11 is extended in the vertical direction toward the flange portion 10B, and the rib 11 and the flange portion 10B are connected to each other, so that the rigidity can be further increased. As a result, the vibration of the inverter case 10 can be further suppressed.
  • the rib 11 is provided on one or both of the left and right sides of the bolt fastening portion 10C in which the mounting flange portion 63c and the inverter flange portion 60f are fastened by the bolt 13.
  • the portion near the bolt fastening portion 10C has a high surface pressure on the sealing surface due to the bolt fastening, resulting in high rigidity. Therefore, by providing the rib 11 in the vicinity of the bolt 13, the rib 11 can be extended to the periphery from a position having high rigidity, and the rigidity of the entire flat surface portion 10A can be effectively increased. By increasing the rigidity of the flat surface portion 10A, vibration of the inverter case 10 can be suppressed.
  • the method of fastening the flange portion 10B is not limited to bolts, and other fastening methods such as rivets may be used as long as the rigidity of the rib 11 can be increased.
  • the ribs 11a near the center of the flat surface portion 10A are provided alternately on the inverter housing 63 side and the motor housing 60 side along the direction (horizontal direction) in which the flange portion 10B of the inverter case 10 extends, so that the number of ribs 11a is small. The rigidity can be effectively increased.
  • five ribs 11 are arranged on the inverter housing 63 side of the flange portion 10B, and five ribs 11 are arranged on the motor housing 60 side.
  • the inverter housing 63 side and the motor The same number of ribs 11 may be provided on the housing 60 side.
  • the ribs 11 on the inverter housing 63 side and the ribs 11 on the motor housing 60 side may be arranged in the vertical direction.
  • the rib 11 is provided on the flat surface of the inverter case 10 opposite to the motor 2. This is because the inverter case 10 has a large flat surface portion 10A on the surface of the inverter case 10 opposite to the motor 2, so that the inverter case 10 is easily affected by vibration, and the vibration suppressing effect of the rib 11 is more effective. Further, in the inverter case 10, the end portion on the vehicle front side (+ X side) is connected to the peripheral wall portion 60a, and both sides in the vehicle width direction (Y-axis direction) are fixed to the motor cover 61 via the motor flange portion 60bc. By being fixed to the gear housing 62 via the gear flange portion 60cd, it is easy to secure the rigidity.
  • the rib 11 provided on the surface (flat surface portion 10A) of the inverter case 10 opposite to the motor 2 is effective in suppressing vibration. Further, when the first case portion 10a of the inverter case 10 is connected only to the peripheral wall portion 60a, the inverter case 10 is cantileveredly supported by the motor housing 60. In this case, the vibration tends to increase in the flat surface portion 10A located at the position farthest from the connecting portion between the inverter case 10 and the peripheral wall portion 60a. Therefore, it is more effective to have the inverter case 10 provided with the rib 11.
  • the first case portion 10a is a part of the motor housing 60.
  • the vibration of the motor 2 is easily transmitted to the inverter case 10.
  • a configuration in which the rib 11 is provided on the flat surface portion 10A of the inverter case 10 is particularly effective for suppressing vibration.
  • the first case portion 10a which is a part of the motor housing 60, is located on the vehicle rear side of the peripheral wall portion 60a. That is, the first case portion 10a is arranged adjacent to the motor 2 in the horizontal direction (vehicle front-rear direction). According to this configuration, the inverter case 10 is less likely to protrude from the upper part to the upper side or from the lower part to the lower side of the motor unit 1. Therefore, it is possible to prevent the length of the motor unit 1 from increasing in the vertical direction.
  • the second case portion 10b (inverter housing 63) is located on the vehicle rear side (-X side) of the upper portion of the motor housing 60. That is, the second case portion 10b is arranged at a position overlapping the motor housing 60 when viewed from the front-rear direction of the vehicle. According to this configuration, the portion of the second case portion 10b located above the motor housing 60 is reduced. The length of the motor unit 1 in the vertical direction can be shortened. When viewed from the front-rear direction of the vehicle, the entire second case portion 10b may be configured to overlap the motor housing 60. According to this configuration, since the second case portion 10b does not protrude upward from the motor housing 60, the length of the motor unit 1 in the vertical direction can be further shortened.
  • the oil pump 9 is supported by the motor housing 60 in a cantilevered manner.
  • the motor housing 60 has a tubular portion 60h for accommodating the oil pump 9.
  • the tubular portion 60h is connected to the outer peripheral surface of the peripheral wall portion 60a on its outer peripheral surface.
  • the end of the tubular portion 60h on one side (+ Y side) in the axial direction is connected to the second overhanging portion 60cc. That is, the oil pump 9 which is an auxiliary machine is supported at a position where it protrudes radially outward from the peripheral wall portion 60a of the motor housing 60.
  • auxiliary machine such as the oil pump 9
  • the motor housing 60 When an auxiliary machine such as the oil pump 9 is supported by the motor housing 60 in a substantially cantilevered state, vibration is generated due to the shaking of the heavy-weight auxiliary machine. Vibration caused by auxiliary equipment may be transmitted to the inverter case 10 and cause vibration. In such a case, providing the rib 11 on the inverter case 10 is particularly effective in suppressing vibration.
  • FIG. 8 is a partial perspective view of a motor unit including an inverter case of a modified example.
  • the arrangement of the ribs on the flat surface portion 10A facing the rear side of the vehicle is different from the configuration of the embodiment shown in FIG.
  • the inverter case 10 of the modified example has a flange portion 10B that horizontally crosses the flat surface portion 10A.
  • the flange portion 10B has a plurality of bolt fastening portions 10C arranged in a direction in which the flange portion 10B extends.
  • the flange portion 10B has four bolt fastening portions 10C. Two of the bolt fastening portions 10C are arranged at the left and right ends of the flat surface portion 10A, respectively. Note that in FIG. 8, the bolt 13 for fastening the mounting flange portion 63c and the inverter flange portion 60f is not shown.
  • the inverter case 10 of the modified example has a plurality of ribs 11A extending downward from the upper end portion of the second case portion 10b and connected to the upper surface of the flange portion 10B on the flat surface portion 10A, and the lower end of the first case portion 10a. It has a plurality of ribs 11B and a plurality of ribs 11C extending upward from the portion and connected to the lower portion of the flange portion 10B, and a plurality of ribs 11D extending in a direction intersecting the plurality of ribs 11B and the plurality of ribs 11C.
  • the plurality of ribs 11A connect the upper surface of the mounting flange portion 63c to the surface of the main body accommodating portion 63a facing the vehicle rear side.
  • the plurality of ribs 11A extend in the vertical direction.
  • the inverter case 10 has seven ribs 11A. Six of the ribs 11A extend upward from a position adjacent to the bolt fastening portion 10C. According to this configuration, the rib 11A is connected to the bolt fastening portion 10C, which is a highly rigid portion of the flange portion 10B, so that the rigidity of the surface of the main body accommodating portion 63a facing the vehicle rear side is increased and vibration is effective. Can be suppressed.
  • One of the seven ribs 11A extends upward from the central portion of the mounting flange portion 63c in the vehicle width direction (left-right direction).
  • the present embodiment since there is a relatively wide flat surface portion in the left-right direction central portion on the surface of the main body accommodating portion 63a facing the vehicle rear side, one of the ribs 11A is arranged in the left-right direction central portion. Vibration can be suppressed more effectively.
  • the plurality of ribs 11B connect the inverter flange portion 60f and the surface of the first connecting plate portion 60d facing the vehicle rear side.
  • the lower ends of the plurality of ribs 11B reach the lower ends of the surface of the first connecting plate portion 60d facing the vehicle rear side.
  • the inverter case 10 has eight ribs 11B. Two ribs 11B are arranged for each bolt fastening portion 10C. That is, at each of the four bolt fastening portions 10C, the upper ends of the ribs 11B are connected to both ends of the bolt fastening portion 10C in the left-right direction.
  • the rigidity of the first connecting plate portion 60d can be increased by connecting the rib 11B to the bolt fastening portion 10C which is a highly rigid portion of the flange portion 10B. Further, since the two ribs 11B extend from one bolt fastening portion 10C, the arrangement density of the ribs 11B on the surface of the first connecting plate portion 60d becomes high. Therefore, vibration can be suppressed in a wide range of the first connection plate portion 60d.
  • the plurality of ribs 11C connect the inverter flange portion 60f and the surface of the first connecting plate portion 60d facing the vehicle rear side.
  • the inverter case 10 has three ribs 11C.
  • the rib 11C is arranged between two bolt fastening portions 10C adjacent to each other in the left-right direction.
  • the rib 11C has a width larger than that of the rib 11B. According to this configuration, the rigidity of the region located between the ribs 11B extending from the bolt fastening portion 10C can be increased.
  • the rib 11C is a rib that is not connected to the bolt fastening portion 10C, but since it is a rib having a width larger than that of the rib 11B, the rigidity of the first connecting plate portion 60d can be sufficiently increased.
  • the plurality of ribs 11D are arranged at the central portion and the lower end portion in the vertical direction of the first connecting plate portion 60d. That is, the inverter case 10 has two ribs 11D. One rib 11D intersects the vertical central portion of the rib 11B and the rib 11C. The other rib 11D intersects the lower ends of the rib 11B and the rib 11C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne une unité de moteur qui comprend : un moteur ayant un rotor pouvant tourner autour d'un arbre de moteur et un stator positionné sur l'extérieur du rotor dans la direction radiale ; un onduleur qui commande le courant fourni au moteur ; et un boîtier d'onduleur logeant l'onduleur. Le boîtier d'onduleur possède une première section de boîtier et une seconde section de boîtier. La première section de boîtier et la seconde section de boîtier ont chacune une bride. La première section de boîtier et la seconde section de boîtier sont fixées par les brides. Au moins l'une ou l'autre de la première section de boîtier ou de la seconde section de boîtier a une nervure qui s'étend vers leur bride respective.
PCT/JP2020/015621 2019-04-11 2020-04-07 Unité de moteur WO2020209244A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-075799 2019-04-11
JP2019075799 2019-04-11

Publications (1)

Publication Number Publication Date
WO2020209244A1 true WO2020209244A1 (fr) 2020-10-15

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PCT/JP2020/015621 WO2020209244A1 (fr) 2019-04-11 2020-04-07 Unité de moteur

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WO (1) WO2020209244A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220352790A1 (en) * 2021-04-28 2022-11-03 Nidec Corporation Drive device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000295818A (ja) * 1999-04-01 2000-10-20 Denso Corp 液冷式回転電機
JP2009201218A (ja) * 2008-02-20 2009-09-03 Aisin Aw Co Ltd ハイブリッド駆動装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000295818A (ja) * 1999-04-01 2000-10-20 Denso Corp 液冷式回転電機
JP2009201218A (ja) * 2008-02-20 2009-09-03 Aisin Aw Co Ltd ハイブリッド駆動装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220352790A1 (en) * 2021-04-28 2022-11-03 Nidec Corporation Drive device

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