WO2019208078A1 - Electric oil pump - Google Patents

Electric oil pump Download PDF

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Publication number
WO2019208078A1
WO2019208078A1 PCT/JP2019/013338 JP2019013338W WO2019208078A1 WO 2019208078 A1 WO2019208078 A1 WO 2019208078A1 JP 2019013338 W JP2019013338 W JP 2019013338W WO 2019208078 A1 WO2019208078 A1 WO 2019208078A1
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WO
WIPO (PCT)
Prior art keywords
pump
rotor
discharge port
axial direction
suction port
Prior art date
Application number
PCT/JP2019/013338
Other languages
French (fr)
Japanese (ja)
Inventor
慈裕 片岡
小林　喜幸
Original Assignee
日本電産トーソク株式会社
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 日本電産トーソク株式会社 filed Critical 日本電産トーソク株式会社
Priority to JP2020516129A priority Critical patent/JP7310804B2/en
Priority to CN201990000648.5U priority patent/CN214036097U/en
Publication of WO2019208078A1 publication Critical patent/WO2019208078A1/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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 an electric oil pump.
  • Patent Document 1 discloses an electric oil pump in which a motor unit, a pump unit, and an inverter unit having a circuit board are integrated.
  • the pump unit includes a pump body that houses the pump rotor, and a pump cover that is attached to one axial side of the pump body.
  • the pump cover has a suction port for sucking oil and a discharge port for discharging oil.
  • the suction port and the discharge port are provided on the end surface on one axial side of the pump cover.
  • the suction port opens at an end portion on one axial side of the suction port protruding from the end surface.
  • the discharge port opens at an end portion on one side in the axial direction of the discharge port protruding from the end surface.
  • the suction port and the discharge port are disposed adjacent to the end surface in the radial direction.
  • the protruding length of the discharge port in the axial direction is longer than the protruding length of the suction port in the axial direction. For this reason, the oil passage can be easily brought into contact with each of the suction port and the discharge port.
  • An object of the present invention is to provide an electric oil pump capable of suppressing an increase in axial size of the electric oil pump.
  • An exemplary first invention of the present application is a motor unit having a shaft centered on a central axis extending in the axial direction, and is positioned on one axial side of the motor unit and driven by the motor unit via the shaft.
  • a pump housing that is provided with a pump rotor, an intake port that sucks in the oil, and a discharge port that discharges the oil, and houses the pump rotor
  • the pump housing includes a pump body having a housing portion that houses the pump rotor, and a pump cover that is attached to one axial side of the pump body.
  • An end face provided on one side and a cylindrical side face connected to the peripheral edge of the end face and extending to the other side in the axial direction, and the suction port is provided on one of the end face and the side face,
  • the discharge port is provided on the other of the end surface and the front side surface.
  • the first exemplary invention of the present application it is possible to provide an electric oil pump capable of suppressing an increase in axial size of the electric oil pump.
  • an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system.
  • the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in FIG.
  • the X-axis direction is a direction parallel to the short direction of the electric oil pump shown in FIG. 1, that is, a direction orthogonal to the paper surface of FIG.
  • the Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction.
  • the side facing the arrow shown in the figure is the + side and the opposite side is the-side.
  • the positive side (+ Z side) in the Z-axis direction is described as “rear side”
  • the negative side ( ⁇ Z side) in the Z-axis direction is described as “front side”.
  • the rear side and the front side are simply names used for explanation, and do not limit the actual positional relationship and direction.
  • the direction parallel to the central axis J (Z-axis direction) is simply described as “axial direction”
  • the radial direction centered on the central axis J is simply described as “radial direction”
  • the center The circumferential direction around the axis J that is, the circumference of the central axis J ( ⁇ direction) is simply referred to as “circumferential direction”.
  • extending in the axial direction means not only extending in the axial direction (Z-axis direction) but also extending in a direction inclined by less than 45 ° with respect to the axial direction. Including. Further, in this specification, the term “extend in the radial direction” means 45 ° with respect to the radial direction in addition to the case where it extends strictly in the radial direction, that is, the direction perpendicular to the axial direction (Z-axis direction). Including the case of extending in a tilted direction within a range of less than.
  • FIG. 1 is a perspective view of the electric oil pump according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing the internal structure of the electric oil pump.
  • the electric oil pump 1 of this embodiment has the motor part 10, the pump part 40, and the inverter part 70, as shown in FIG.1 and FIG.2.
  • the motor unit 10 and the pump unit 40 are arranged along the axial direction.
  • the motor unit 10 includes a shaft 11 disposed along a central axis J extending in the axial direction.
  • the pump unit 40 is located on one side (front side) in the axial direction of the motor unit 10 and is driven by the motor unit 10 via the shaft 11 to discharge oil.
  • the inverter unit 70 is located on the other axial side (rear side) of the motor unit 10 and is fixed to the motor unit 10.
  • each constituent member will be described in detail.
  • the inverter unit 70 includes an inverter housing 73 having a circuit board housing part 73 a for housing the circuit board 75.
  • the inverter housing 73 has a bottomed cylindrical shape having a bottom portion 73b on the motor unit 10 side.
  • the inverter housing 73 extends radially outward from the other axial side (rear side) of the motor housing 13.
  • the inverter housing 73 is made of a resin material and has a rectangular shape when viewed in the axial direction.
  • the inverter unit 70 further includes a cover unit 90 that covers an opening 73 c that opens to the other axial side (rear side) of the inverter housing 73.
  • the inverter housing 73 has a recess 73 e that is recessed to the inside of the inverter housing 73 on a side surface 73 d in a direction orthogonal to a direction extending radially outward when viewed in the axial direction.
  • the recesses 73e are both ends of the inverter housing 73 in the X-axis direction, and are positioned on the radially outer side of the cylindrical part 14 and on the negative side ( ⁇ Y side) of the cylindrical part 14 in the Y-axis direction. It is provided at a position close to the flange portion 77.
  • a total of four recesses 73e are provided, two at each of the side surfaces 73d on both sides in the X-axis direction of the inverter housing 73.
  • a recess 73e provided on one side in the X-axis direction of the inverter housing 73 and a recess 73e provided on the other side in the X-axis direction of the inverter housing 73 intersect with the central axis J and extend in the Y-axis direction (see FIG. 5).
  • the flange portion 77 will be described later.
  • a plurality of flange portions 77 extending radially with respect to the central axis J are provided on the side surfaces 73d on both sides in the X-axis direction of the inverter housing 73.
  • four flange portions 77 are provided at intervals in the circumferential direction.
  • the flange portion 77 is provided with a fixing hole portion 77a for passing a bolt.
  • the fixing hole 77a is a hole through which a bolt for fixing the electric oil pump 1 to a fixing object (not shown) is passed.
  • FIG. 3 is an enlarged sectional view of the fixing member.
  • FIG. 4 is an enlarged side view of the fixing member.
  • the recessed portion 73 e has a surface portion 73 e 1 that is recessed from a position having a predetermined distance from the end surface 73 f to the other axial side (rear side) of the side surface 73 d of the inverter housing 73.
  • the end surface 73 f is a surface facing the motor unit 10 side of the inverter housing 73.
  • the recess 73e has a pair of side surface portions 73e2 extending in the axial direction on both sides in the extending direction of the inverter housing 73 while extending from the surface portion 73e1 to the other side (rear side) in the side surface 73d.
  • the distance L between the pair of side surface portions 73e2 is larger than the width W of the crimped portion 31.
  • the caulking portion 31 will be described later.
  • the motor unit 10 includes a motor housing 13, a rotor 20, a shaft 11, and a stator 22.
  • the motor unit 10 is, for example, an inner rotor type motor, in which the rotor 20 is fixed to the other axial side (rear side) of the shaft 11, and the stator 22 is positioned on the radially outer side of the rotor 20.
  • the motor housing 13 accommodates the rotor 20 and the stator 22. Further, the motor housing 13 includes a cylindrical portion 14 and a base plate 25. The cylindrical portion 14 is located outside the stator 22 in the radial direction and surrounds the stator 22. The base plate 25 is connected to the end portion of the cylindrical portion 14 on the inverter portion 70 side, is disposed on one side (front side) in the axial direction of the inverter housing 73, and spreads in the radial direction with respect to the central axis J.
  • the cylindrical portion 14 extends in the axial direction and has a through hole 14a therein.
  • the shaft 11, the rotor 20, and the stator 22 of the motor unit 10 are disposed in the through hole 14a.
  • the outer surface of the stator 22, that is, the outer surface of a core back portion 22a described later is fitted to the inner surface 14b of the cylindrical portion 14. As a result, the stator 22 is accommodated in the cylindrical portion 14.
  • the cylinder part 14 is made of a metal material.
  • the base plate 25 is connected to the end of the cylindrical portion 14 on the inverter portion 70 side. As shown in FIGS. 1 and 2, the base plate 25 is plate-shaped and extends in a direction along the end surface 73 f on one axial side of the inverter housing 73 to cover the end surface 73 f. In the present embodiment, the base plate 25 protrudes radially outward from the cylindrical portion 14 and has a rectangular shape in the Y-axis direction when viewed in the axial direction. The negative side ( ⁇ Y side) of the base plate 25 in the Y axis direction protrudes larger than the plus side.
  • the cylindrical portion 14 and the base plate 25 of the motor housing 13 are an integrated object by drawing.
  • FIG. 5 is a bottom view of the electric oil pump.
  • a plurality of flange portions 25 a projecting radially are provided outside the base plate 25 in the radial direction of the cylindrical portion 14.
  • four flange portions 25a are provided at intervals in the circumferential direction.
  • the flange portion 25a is provided with a fixing hole portion 25b for allowing the bolt to pass therethrough.
  • the fixing hole portion 25b is a hole through which a bolt for fixing the electric oil pump 1 to a fixed object is passed.
  • the fixing hole portion 25b of the base plate 25 and the fixing hole portion 77a of the inverter housing 73 communicate with each other.
  • the cover 90 that covers the opening of the inverter housing 73 is provided with a hole that communicates with the fixing hole 77 a of the inverter housing 73. For this reason, the inverter housing 73 and the cover part 90 are fastened together via a bolt passed through the base plate 25 and are integrally coupled.
  • the base plate 25 includes a fixing member 30 that is provided integrally with the base plate 25 and fixes the inverter housing 73 at least in the axial direction.
  • the fixing member 30 is located at both ends of the base plate 25 in a direction intersecting with a direction extending outward in the radial direction of the base plate 25 when viewed in the axial direction.
  • the fixing member 30 is close to the flange portion 25a located at both ends of the base plate 25 in the X-axis direction, on the radially outer side of the cylindrical portion 14 and on the negative side of the cylindrical portion 14 in the Y-axis direction. Provided in position. That is, a total of four fixing members 30 are provided at two positions on both ends of the base plate 25 in the X-axis direction.
  • the fixing member 30 provided on one side of the base plate 25 in the X-axis direction and the fixing member 30 provided on the other side of the base plate 25 in the X-axis direction intersect the virtual axis A that intersects the central axis J and extends in the Y-axis direction. Opposed to each other.
  • the fixing member 30 has a caulking portion 31 protruding from each of the end portions on both sides of the base plate 25, as shown in FIGS.
  • the caulking portion 31 is bent to the other side (rear side) in the axial direction with respect to the base plate 25 and is bent into the recess 73e, thereby fixing the inverter housing 73 to the base plate 25.
  • the caulking portion 31 is in contact with the surface portion 73e1 while being bent in the recess 73e. For this reason, the inverter housing 73 can be fixed to the base plate 25 at least in the axial direction by the caulking portion 31.
  • the caulking portion 31 is in contact with the surface portion 73e1 while being bent in the recess 73e, and the front end portion of the caulking portion 31 is indicated on the one side in the axial direction (front side). ) May be bent further.
  • the backlash that the inverter housing 73 moves in the X-axis direction with respect to the base plate 25 can be further suppressed.
  • the caulking portion 31 is provided at both end portions in the X-axis direction of the base plate 25. Therefore, when the inverter housing 73 is fixed by the caulking portion 31, the inverter housing 73 is attached to the base plate 25. It can be firmly fixed without rattling.
  • the caulking portion 31 is in a position in which the end portions on both sides in the width direction of the caulking portion 31 face the pair of side surface portions 73 e 2 of the concave portion 73 e in a state where the caulking portion 31 is in contact with the surface portion 73 e 1 of the concave portion 73 e. Placed in. For this reason, when the crimping part 31 is bent in the recessed part 73e, it can suppress that the crimping part 31 contacts the side part 73e2 of the recessed part 73e.
  • the end portions on both sides in the width direction of the caulking portion 31 come into contact with the side surface portion 73e2 of the recess 73e, and the Y-axis of the inverter housing 73 Directional deviation can be suppressed.
  • the rotor 20 has a rotor core 20a and a rotor magnet 20b.
  • the rotor core 20a is fixed to the shaft 11 so as to surround the shaft 11 around the axis ( ⁇ direction).
  • the rotor magnet 20b is fixed to the outer surface along the axis ( ⁇ direction) of the rotor core 20a.
  • the rotor core 20a and the rotor magnet 20b rotate together with the shaft 11.
  • the rotor 20 may be an embedded magnet type in which a permanent magnet is embedded in the rotor 20.
  • the embedded magnet type rotor 20 can reduce the peeling of the magnet due to centrifugal force, and actively uses the reluctance torque. can do.
  • the stator 22 surrounds the rotor 20 around the axis ( ⁇ direction), and rotates the rotor 20 around the central axis J.
  • the stator 22 includes a core back portion 22a, a teeth portion 22c, a coil 22b, and an insulator (bobbin) 22d.
  • the shape of the core back portion 22a is a cylindrical shape concentric with the shaft 11.
  • the teeth part 22c extends toward the shaft 11 from the inner surface of the core back part 22a.
  • a plurality of teeth portions 22c are provided, and are arranged at equal intervals in the circumferential direction of the inner surface of the core back portion 22a.
  • the coil 22b is provided around the insulator (bobbin) 22d.
  • An insulator (bobbin) 22d is attached to each tooth portion 22c.
  • the shaft 11 extends along the central axis J and penetrates the motor unit 10.
  • the front side ( ⁇ Z side) of the shaft 11 protrudes from the motor unit 10, is supported by the bearing 17, and extends into the pump unit 40.
  • the rear side (+ Z side) of the shaft 11 protrudes from the rotor 20 and is supported by the bearing 16. For this reason, the rotor 20 is in a state where both ends are supported.
  • the pump unit 40 is located on one axial side of the motor unit 10, specifically, on the front side ( ⁇ Z side).
  • the pump unit 40 is driven through the shaft 11 by the motor unit 10.
  • the pump unit 40 includes a pump rotor 47 and a pump housing 51.
  • the pump housing 51 includes a pump body 52 and a pump cover 57.
  • the pump body 52 is fixed to the front side ( ⁇ Z side) of the motor housing 13 on the front side ( ⁇ Z side) of the motor unit 10.
  • the pump body 52 has a recess 54 that is recessed from the rear side (+ Z side) surface to the front side ( ⁇ Z side).
  • the bearing 17 and the seal member 18 are accommodated in the recess 54.
  • the pump body 52 has a housing portion 53 having a side surface 53 a that faces the peripheral surface of the pump rotor 47 and a bottom surface 53 b that is located on the rear side (+ Z side) of the pump portion 40.
  • the accommodating portion 53 opens to the front side ( ⁇ Z side) and is recessed to the rear side (+ Z side).
  • the shape of the accommodating portion 53 viewed from the axial direction is a circular shape.
  • the pump cover 57 covers the pump body 52 from the front side ( ⁇ Z side), thereby providing an accommodating portion 53 between the pump body 52 and the pump cover 52.
  • the pump body 52 has a through hole 55 penetrating along the central axis J.
  • Through-holes 55 are open at both ends in the axial direction to allow the shaft 11 to pass therethrough, a rear side (+ Z side) opening is opened in the recess 54, and a front side ( ⁇ Z side) opening is opened in the accommodating portion 53.
  • the through hole 55 functions as a slide bearing 45 that supports the shaft 11 rotatably.
  • a pump-side flange portion 52 a that protrudes radially outward and extends in the axial direction is provided on the outer side surface of the pump body 52.
  • a plurality of the pump-side flange portions 52a are provided at intervals in the circumferential direction.
  • the pump side flange portion 52a is provided with a through hole (not shown) penetrating in the axial direction.
  • the pump body 52 is detachably fixed to the motor housing 13 through a bolt 56 passed through the through hole.
  • the pump cover 57 includes an end surface 58 provided on one side (front side) in the axial direction, and a cylindrical side surface 61 that is connected to the peripheral portion of the end surface 58 and extends to the other side in the axial direction. And having.
  • a suction port 63 is provided on one of the end surface 58 and the side surface 61, and a discharge port 64 is provided on the other of the end surface 58 and the side surface 61.
  • the end surface 58 has a circular shape when viewed in the axial direction.
  • the suction port 63 is provided on the end surface 58.
  • the discharge port 64 is provided on the side surface 61.
  • the suction port 63 is disposed at a peripheral portion on one side in the radial direction of the end surface, and the discharge port 64 is disposed at a position facing the suction port 63 with respect to the central axis J.
  • the suction port 63 has a circular shape when viewed in the axial direction.
  • the discharge port 64 has a long hole shape extending in the circumferential direction of the side surface 61.
  • the opening area of the discharge port 64 is the same as the opening area of the suction port 63.
  • the opening area of the discharge port 64 may be slightly smaller than the opening area of the suction port 63.
  • the discharge port 64 is disposed at a position having a predetermined distance from the end on one side in the axial direction of the side surface 61 to the other side in the axial direction.
  • a sealing member 66 is provided in an annular shape so that a supply oil passage for supplying oil to the suction port 63 is in close contact with the side surface 61.
  • the suction port is provided on the end surface and the discharge port is provided on the side surface is shown, but the present invention is not limited to this.
  • the discharge port may be provided on the end surface, and the suction port may be provided on the side surface.
  • the relative positions of the suction port and the discharge port and the area of the opening are the same as in the above-described embodiment.
  • the pump rotor 47 is attached to the shaft 11. More specifically, the pump rotor 47 is attached to the front side ( ⁇ Z side) of the shaft 11.
  • the pump rotor 47 includes an inner rotor 47a attached to the shaft 11 and an outer rotor 47b surrounding the radially outer side of the inner rotor 47a.
  • the inner rotor 47a is annular.
  • the inner rotor 47a is a gear having teeth on the radially outer surface.
  • the inner rotor 47a is fixed to the shaft 11. More specifically, the front side ( ⁇ Z side) end of the shaft 11 is press-fitted inside the inner rotor 47a.
  • the inner rotor 47a rotates around the axis ( ⁇ direction) together with the shaft 11.
  • the outer rotor 47b has an annular shape surrounding the radially outer side of the inner rotor 47a.
  • the outer rotor 47b is a gear having teeth on the radially inner side surface.
  • the inner rotor 47a and the outer rotor 47b mesh with each other, and the outer rotor 47b rotates as the inner rotor 47a rotates. That is, the pump rotor 47 is rotated by the rotation of the shaft 11. In other words, the motor unit 10 and the pump unit 40 have the same rotation axis. Thereby, it can suppress that the electric oil pump 1 enlarges to an axial direction.
  • a suction port 63 a is disposed on the rear side (+ Z side) of the negative pressure region of the pump rotor 47. Further, a discharge port 64 a is disposed on the rear side (+ Z side) of the pressurizing region of the pump rotor 47.
  • the oil sucked into the accommodating portion 53 from the suction port 63 provided in the pump cover 57 is accommodated in a volume portion between the inner rotor 47a and the outer rotor 47b and sent to the pressurizing region. Thereafter, the oil is discharged from the discharge port 64 through the discharge port 64a.
  • the pump cover 57 of the electric oil pump 1 is provided with a suction port 63 on one of the end surface 58 and the side surface 61, and the end surface 58 and the side surface 61.
  • One of the other is provided with a discharge port 64.
  • the suction port 63 and the discharge port 64 are located away from each other, the positions of the suction port 63 and the discharge port 64 are compared with the case where the suction port 63 and the discharge port 64 are disposed in close proximity. There is no need to shift the direction. For this reason, since the oil passage can be directly connected to each of the suction port 63 and the discharge port 64, an increase in the size of the electric oil pump 1 in the axial direction can be suppressed.
  • the suction port 63 is disposed at a peripheral portion on one side in the radial direction of the end surface 58, and the discharge port 64 is disposed at a position facing the suction port 63 with respect to the central axis J.
  • the relative positions of the suction port 63 and the discharge port 64 can be arranged at positions separated from each other.
  • operativity at the time of connecting an oil path to each of the suction inlet 63 and the discharge outlet 64 can be made easy.
  • the suction port 63 has a circular shape when viewed in the axial direction, and the discharge port 64 has a long hole shape extending in the circumferential direction of the side surface 61. Since the shapes of the suction port 63 and the discharge port 64 are different, it is possible to prevent an erroneous operation of erroneously connecting the corresponding oil passages.
  • the opening area of the discharge port 64 is the same as or slightly smaller than the opening area of the suction port 63. For this reason, when the oil sucked from the suction port 63 flows through the discharge port 64, it is possible to suppress a decrease in pressure loss and prevent a decrease in the flow rate of the oil flowing out from the discharge port 64.
  • a seal member 66 is provided in an annular shape between the end on one side in the axial direction of the side surface 61 and the discharge port 64 so that the supply oil passage for supplying oil to the suction port 63 is in close contact with the side surface. .
  • the oil passage for supplying oil to the suction port 63 can be connected to the pump cover 57 in a state of being in close contact with the side surface 61. For this reason, intrusion of air can be prevented, and a decrease in the flow rate of oil sucked into the suction port 63 can be prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

This electric oil pump 1 has a motor unit 10, a pump unit 40, and an inverter unit 70 fixed to the motor unit 10. The motor unit 10 has a rotor, a stator, and a motor housing 13 that accommodates the rotor and the stator. The pump unit 40 has a pump rotor, a suction port 63 for suctioning oil, a discharge port 64 for discharging oil, and a pump housing 51 which accommodates the pump rotor. The pump housing 51 has a pump body 52 that accommodates the pump rotor and a pump cover 57 attached to the pump body. The pump cover 57 has an end surface 58 provided on one side in the axial direction and a cylindrical side surface 61 connected to a peripheral section of the end surface 58 and extending to the other side in the axial direction. The suction port 63 is provided in any one among the end surface 58 and the side surface 61, and the discharge port 64 is provided in the other.

Description

電動オイルポンプElectric oil pump
　本発明は、電動オイルポンプに関する。 The present invention relates to an electric oil pump.
　例えば、特許文献１には、モータ部とポンプ部と回路基板を有したインバータ部とが一体化された電動オイルポンプが開示される。ポンプ部は、ポンプロータを収容するポンプボディと、ポンプボディの軸方向一方側に取り付けられるポンプカバーと、を有する。 For example, Patent Document 1 discloses an electric oil pump in which a motor unit, a pump unit, and an inverter unit having a circuit board are integrated. The pump unit includes a pump body that houses the pump rotor, and a pump cover that is attached to one axial side of the pump body.
　ポンプカバーは、オイルを吸入する吸入口と、オイルを吐出する吐出口とを有する。吸入口及び吐出口は、ポンプカバーの軸方向一方側の端面に設けられる。吸入口は、端面から突出する吸入ポートの軸方向一方側の端部に開口する。吐出口は、端面から突出する吐出ポートの軸方向一方側の端部に開口する。吸入ポート及び吐出ポートは、端面に対して径方向に隣接して配置される。吐出ポートの軸方向の突出長さは、吸入ポートの軸方向の突出長さよりも長い。このため、吸入ポート及び吐出ポートの夫々に油路を容易に接触することができる。 The pump cover has a suction port for sucking oil and a discharge port for discharging oil. The suction port and the discharge port are provided on the end surface on one axial side of the pump cover. The suction port opens at an end portion on one axial side of the suction port protruding from the end surface. The discharge port opens at an end portion on one side in the axial direction of the discharge port protruding from the end surface. The suction port and the discharge port are disposed adjacent to the end surface in the radial direction. The protruding length of the discharge port in the axial direction is longer than the protruding length of the suction port in the axial direction. For this reason, the oil passage can be easily brought into contact with each of the suction port and the discharge port.
特開２０１５－１７２３５０号公報JP 2015-172350 A
　しかしながら、特許文献１に記載の電動オイルポンプは、吐出ポートの軸方向の突出長さが吸入ポートの軸方向の突出長さよりも長いので、電動オイルポンプの軸方向の大型化を招く。 However, since the electric oil pump described in Patent Document 1 has a longer protruding length in the axial direction of the discharge port than the protruding length in the axial direction of the suction port, the electric oil pump is increased in size in the axial direction.
　本発明の目的は、電動オイルポンプの軸方向の大型化を抑制可能な電動オイルポンプを提供することである。 An object of the present invention is to provide an electric oil pump capable of suppressing an increase in axial size of the electric oil pump.
　本願の例示的な第１発明は、軸方向に延びる中心軸を中心とするシャフトを有するモータ部と、前記モータ部の軸方向一方側に位置し、前記モータ部によって前記シャフトを介して駆動されオイルを吐出するポンプ部と、前記モータ部の軸方向他方側に位置して前記モータ部に固定されるインバータ部と、を有し、前記モータ部は、前記シャフトの軸方向他方側に固定されるロータと、前記ロータの径方向外側に位置するステータと、前記ロータ及び前記ステータを収容するモータハウジングと、を有し、前記ポンプ部は、前記モータ部から軸方向一方側に突出する前記シャフトに取り付けられるポンプロータと、前記オイルを吸入する吸入口と、前記オイルを吐出する吐出口とが設けられ、前記ポンプロータを収容するポンプハウジングと、を有し、前記ポンプハウジングは、前記ポンプロータを収容する収容部を有するポンプボディと、前記ポンプボディの軸方向一方側に取り付けられるポンプカバーと、を有し、前記ポンプカバーは、軸方向一方側に設けられた端面と、前記端面の周縁部に繋がって軸方向他方側へ延びる筒状の側面と、を有し、前記端面及び前記側面のいずれか一方に前記吸入口が設けられ、前記端面及び前側面のいずれか他方に前記吐出口が設けられる電動オイルポンプである。 An exemplary first invention of the present application is a motor unit having a shaft centered on a central axis extending in the axial direction, and is positioned on one axial side of the motor unit and driven by the motor unit via the shaft. A pump unit that discharges oil, and an inverter unit that is positioned on the other side in the axial direction of the motor unit and is fixed to the motor unit, and the motor unit is fixed to the other side in the axial direction of the shaft. The rotor, a stator positioned radially outward of the rotor, and a motor housing that houses the rotor and the stator, and the pump portion projects from the motor portion to one axial side. A pump housing that is provided with a pump rotor, an intake port that sucks in the oil, and a discharge port that discharges the oil, and houses the pump rotor The pump housing includes a pump body having a housing portion that houses the pump rotor, and a pump cover that is attached to one axial side of the pump body. An end face provided on one side and a cylindrical side face connected to the peripheral edge of the end face and extending to the other side in the axial direction, and the suction port is provided on one of the end face and the side face, In the electric oil pump, the discharge port is provided on the other of the end surface and the front side surface.
　本願の例示的な第１発明によれば、電動オイルポンプの軸方向の大型化を抑制可能な電動オイルポンプを提供することができる。 According to the first exemplary invention of the present application, it is possible to provide an electric oil pump capable of suppressing an increase in axial size of the electric oil pump.
第１実施形態に係る電動オイルポンプの斜視図である。It is a perspective view of the electric oil pump concerning a 1st embodiment. 電動オイルポンプの内部構造を示した断面図である。It is sectional drawing which showed the internal structure of the electric oil pump. 固定部材の拡大断面図である。It is an expanded sectional view of a fixing member. 固定部材の拡大側面図である。It is an enlarged side view of a fixing member. 電動オイルポンプの底面図である。It is a bottom view of an electric oil pump.
　以下、図面を参照しながら、本発明の実施形態に係る電動オイルポンプについて説明する。また、以下の図面においては、各構成をわかり易くするために、実際の構造と各構造における縮尺及び数等を異ならせる場合がある。 Hereinafter, an electric oil pump according to an embodiment of the present invention will be described with reference to the drawings. Moreover, in the following drawings, in order to make each structure easy to understand, the actual structure may be different from the scale and number in each structure.
　また、図面においては、適宜３次元直交座標系としてＸＹＺ座標系を示す。ＸＹＺ座標系において、Ｚ軸方向は、図２に示す中心軸Ｊの軸方向と平行な方向とする。Ｘ軸方向は、図１に示す電動オイルポンプの短手方向と平行な方向、すなわち、図１の紙面と直交する方向とする。Ｙ軸方向は、Ｘ軸方向とＺ軸方向との両方と直交する方向とする。Ｘ軸方向、Ｙ軸方向、Ｚ軸方向の何れにおいても、図中に示される矢印の向く側を＋側、反対側を－側とする。 In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in FIG. The X-axis direction is a direction parallel to the short direction of the electric oil pump shown in FIG. 1, that is, a direction orthogonal to the paper surface of FIG. The Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction. In any of the X-axis direction, the Y-axis direction, and the Z-axis direction, the side facing the arrow shown in the figure is the + side and the opposite side is the-side.
　また、以下の説明においては、Ｚ軸方向の正の側（＋Ｚ側）を「リア側」と記述し、Ｚ軸方向の負の側（－Ｚ側）を「フロント側」と記す。なお、リア側及びフロント側とは、単に説明のために用いられる名称であって、実際の位置関係や方向を限定しない。また、特に断りのない限り、中心軸Ｊに平行な方向（Ｚ軸方向）を単に「軸方向」と記述し、中心軸Ｊを中心とする径方向を単に「径方向」と記述し、中心軸Ｊを中心とする周方向、すなわち、中心軸Ｊの軸周り（θ方向）を単に「周方向」と記述する。 In the following description, the positive side (+ Z side) in the Z-axis direction is described as “rear side”, and the negative side (−Z side) in the Z-axis direction is described as “front side”. The rear side and the front side are simply names used for explanation, and do not limit the actual positional relationship and direction. Unless otherwise specified, the direction parallel to the central axis J (Z-axis direction) is simply described as “axial direction”, the radial direction centered on the central axis J is simply described as “radial direction”, and the center The circumferential direction around the axis J, that is, the circumference of the central axis J (θ direction) is simply referred to as “circumferential direction”.
　なお、本明細書において、軸方向に延びる、とは、厳密に軸方向（Ｚ軸方向）に延びる場合に加えて、軸方向に対して、４５°未満の範囲で傾いた方向に延びる場合も含む。また、本明細書において、径方向に延びる、とは、厳密に径方向、すなわち、軸方向（Ｚ軸方向）に対して垂直な方向に延びる場合に加えて、径方向に対して、４５°未満の範囲で傾いた方向に延びる場合も含む。 In this specification, “extending in the axial direction” means not only extending in the axial direction (Z-axis direction) but also extending in a direction inclined by less than 45 ° with respect to the axial direction. Including. Further, in this specification, the term “extend in the radial direction” means 45 ° with respect to the radial direction in addition to the case where it extends strictly in the radial direction, that is, the direction perpendicular to the axial direction (Z-axis direction). Including the case of extending in a tilted direction within a range of less than.
 [第１実施形態]
＜全体構成＞
　図１は、第１実施形態に係る電動オイルポンプの斜視図である。図２は、電動オイルポンプの内部構造を示した断面図である。本実施形態の電動オイルポンプ１は、図１及び図２に示すように、モータ部１０と、ポンプ部４０と、インバータ部７０と、を有する。モータ部１０とポンプ部４０は、軸方向に沿って配置される。モータ部１０は、軸方向に延びる中心軸Ｊに沿って配置されたシャフト１１を有する。ポンプ部４０は、モータ部１０の軸方向一方側（フロント側）に位置し、モータ部１０によってシャフト１１を介して駆動されオイルを吐出する。インバータ部７０は、モータ部１０の軸方向他方側（リア側）に位置してモータ部１０に固定される。以下、構成部材毎に詳細に説明する。 [First embodiment]
<Overall configuration>
FIG. 1 is a perspective view of the electric oil pump according to the first embodiment. FIG. 2 is a cross-sectional view showing the internal structure of the electric oil pump. The electric oil pump 1 of this embodiment has the motor part 10, the pump part 40, and the inverter part 70, as shown in FIG.1 and FIG.2. The motor unit 10 and the pump unit 40 are arranged along the axial direction. The motor unit 10 includes a shaft 11 disposed along a central axis J extending in the axial direction. The pump unit 40 is located on one side (front side) in the axial direction of the motor unit 10 and is driven by the motor unit 10 via the shaft 11 to discharge oil. The inverter unit 70 is located on the other axial side (rear side) of the motor unit 10 and is fixed to the motor unit 10. Hereinafter, each constituent member will be described in detail.
＜インバータ部７０＞
　インバータ部７０は、回路基板７５を収容する回路基板収容部７３ａを有したインバータハウジング７３を有する。インバータハウジング７３は、モータ部１０側に底部７３ｂを有した有底筒状である。インバータハウジング７３は、モータハウジング１３の軸方向他方側（リア側）から径方向外側へ向かって延びる。本実施形態では、インバータハウジング７３は、樹脂材料製であり、軸方向視において長方形状である。インバータ部７０は、インバータハウジング７３の軸方向他方側（リア側）に開口する開口部７３ｃを覆うカバー部９０を、更に有する。 <Inverter unit 70>
The inverter unit 70 includes an inverter housing 73 having a circuit board housing part 73 a for housing the circuit board 75. The inverter housing 73 has a bottomed cylindrical shape having a bottom portion 73b on the motor unit 10 side. The inverter housing 73 extends radially outward from the other axial side (rear side) of the motor housing 13. In the present embodiment, the inverter housing 73 is made of a resin material and has a rectangular shape when viewed in the axial direction. The inverter unit 70 further includes a cover unit 90 that covers an opening 73 c that opens to the other axial side (rear side) of the inverter housing 73.
　インバータハウジング７３は、図１に示すように、軸方向視において径方向外側へ延びる方向に対して直交する方向の側面７３ｄにインバータハウジング７３の内側へ窪む凹部７３ｅを有する。本実施形態では、凹部７３ｅは、インバータハウジング７３のＸ軸方向両端部であって、筒部１４の径方向外側の位置及び筒部１４のＹ軸方向の負の側（－Ｙ側）に位置するフランジ部７７に近接した位置に設けられる。つまり、凹部７３ｅは、インバータハウジング７３のＸ軸方向両側の側面７３ｄに２ヶ所ずつ、合計４か所設けられる。インバータハウジング７３のＸ軸方向一方側に設けられる凹部７３ｅと、インバータハウジング７３のＸ軸方向他方側に設けられる凹部７３ｅは、中心軸Ｊと交差してＹ軸方向に延びる仮想線Ａ（図５参照）に対して対向して配置される。フランジ部７７については後述する。 As shown in FIG. 1, the inverter housing 73 has a recess 73 e that is recessed to the inside of the inverter housing 73 on a side surface 73 d in a direction orthogonal to a direction extending radially outward when viewed in the axial direction. In the present embodiment, the recesses 73e are both ends of the inverter housing 73 in the X-axis direction, and are positioned on the radially outer side of the cylindrical part 14 and on the negative side (−Y side) of the cylindrical part 14 in the Y-axis direction. It is provided at a position close to the flange portion 77. That is, a total of four recesses 73e are provided, two at each of the side surfaces 73d on both sides in the X-axis direction of the inverter housing 73. A recess 73e provided on one side in the X-axis direction of the inverter housing 73 and a recess 73e provided on the other side in the X-axis direction of the inverter housing 73 intersect with the central axis J and extend in the Y-axis direction (see FIG. 5). For reference). The flange portion 77 will be described later.
　インバータハウジング７３のＸ軸方向両側の側面７３ｄには、中心軸Ｊに対して放射状に延びる複数のフランジ部７７が設けられる。本実施形態では、４つのフランジ部７７が周方向に間隔を有して設けられる。フランジ部７７には、ボルトを通すための固定孔部７７ａが設けられる。固定孔部７７ａは、電動オイルポンプ１を固定対象物（図示せず）に固定するためのボルトを通すための孔である。 A plurality of flange portions 77 extending radially with respect to the central axis J are provided on the side surfaces 73d on both sides in the X-axis direction of the inverter housing 73. In the present embodiment, four flange portions 77 are provided at intervals in the circumferential direction. The flange portion 77 is provided with a fixing hole portion 77a for passing a bolt. The fixing hole 77a is a hole through which a bolt for fixing the electric oil pump 1 to a fixing object (not shown) is passed.
　図３は、固定部材の拡大断面図である。図４は、固定部材の拡大側面図である。凹部７３ｅは、図３及び図４に示すように、インバータハウジング７３の側面７３ｄのうち端面７３ｆから軸方向他方側（リア側）へ所定距離を有した位置から窪んだ面部７３ｅ１を有する。なお、端面７３ｆは、インバータハウジング７３のモータ部１０側に対向する面である。 FIG. 3 is an enlarged sectional view of the fixing member. FIG. 4 is an enlarged side view of the fixing member. As shown in FIGS. 3 and 4, the recessed portion 73 e has a surface portion 73 e 1 that is recessed from a position having a predetermined distance from the end surface 73 f to the other axial side (rear side) of the side surface 73 d of the inverter housing 73. Note that the end surface 73 f is a surface facing the motor unit 10 side of the inverter housing 73.
　凹部７３ｅは、側面７３ｄにおいて面部７３ｅ１から軸方向他方側（リア側）へ延びるとともに、インバータハウジング７３の延びる方向の両側に軸方向に延びる一対の側面部７３ｅ２を有する。一対の側面部７３ｅ２間の間隔Ｌは、加締め部３１の幅Ｗよりも大きい。加締め部３１については後述する。 The recess 73e has a pair of side surface portions 73e2 extending in the axial direction on both sides in the extending direction of the inverter housing 73 while extending from the surface portion 73e1 to the other side (rear side) in the side surface 73d. The distance L between the pair of side surface portions 73e2 is larger than the width W of the crimped portion 31. The caulking portion 31 will be described later.
＜モータ部１０＞
　モータ部１０は、図２に示すように、モータハウジング１３と、ロータ２０と、シャフト１１と、ステータ２２と、を有する。 <Motor unit 10>
As shown in FIG. 2, the motor unit 10 includes a motor housing 13, a rotor 20, a shaft 11, and a stator 22.
　モータ部１０は、例えば、インナーロータ型のモータであり、ロータ２０がシャフト１１の軸方向他方側（リア側）に固定され、ステータ２２がロータ２０の径方向外側に位置する。 The motor unit 10 is, for example, an inner rotor type motor, in which the rotor 20 is fixed to the other axial side (rear side) of the shaft 11, and the stator 22 is positioned on the radially outer side of the rotor 20.
（モータハウジング１３）
　モータハウジング１３は、ロータ２０及びステータ２２を収容する。また、モータハウジング１３は、筒部１４とベースプレート２５とを有する。筒部１４は、ステータ２２の径方向外側に位置してステータ２２を囲む。ベースプレート２５は、筒部１４のインバータ部７０側の端部に繋がりインバータハウジング７３の軸方向一方側（フロント側）に配置されて中心軸Ｊに対して径方向に広がる。 (Motor housing 13)
The motor housing 13 accommodates the rotor 20 and the stator 22. Further, the motor housing 13 includes a cylindrical portion 14 and a base plate 25. The cylindrical portion 14 is located outside the stator 22 in the radial direction and surrounds the stator 22. The base plate 25 is connected to the end portion of the cylindrical portion 14 on the inverter portion 70 side, is disposed on one side (front side) in the axial direction of the inverter housing 73, and spreads in the radial direction with respect to the central axis J.
　（筒部１４）
　筒部１４は、軸方向に延びて内部に貫通孔１４ａを有する。貫通孔１４ａ内にモータ部１０のシャフト１１とロータ２０とステータ２２が配置される。筒部１４の内側面１４ｂには、ステータ２２の外側面、すなわち、後述するコアバック部２２ａの外側面が嵌め合わされる。これにより、筒部１４にステータ２２が収容される。筒部１４は金属材料製である。 (Cylinder part 14)
The cylindrical portion 14 extends in the axial direction and has a through hole 14a therein. The shaft 11, the rotor 20, and the stator 22 of the motor unit 10 are disposed in the through hole 14a. The outer surface of the stator 22, that is, the outer surface of a core back portion 22a described later is fitted to the inner surface 14b of the cylindrical portion 14. As a result, the stator 22 is accommodated in the cylindrical portion 14. The cylinder part 14 is made of a metal material.
　（ベースプレート２５）
　ベースプレート２５は、筒部１４のインバータ部７０側の端部に繋がる。ベースプレート２５は、図１及び図２に示すように、板状であり、インバータハウジング７３の軸方向一方側の端面７３ｆに沿う方向に延びて端面７３ｆを覆う。本実施形態では、ベースプレート２５は、筒部１４から径方向外側に突出して、軸方向視においてＹ軸方向に長方形状である。ベースプレート２５の筒部１４からＹ軸方向の負の側（－Ｙ側）は、プラス側よりも大きく突出する。モータハウジング１３の筒部１４及びベースプレート２５は、絞り加工による一体物である。 (Base plate 25)
The base plate 25 is connected to the end of the cylindrical portion 14 on the inverter portion 70 side. As shown in FIGS. 1 and 2, the base plate 25 is plate-shaped and extends in a direction along the end surface 73 f on one axial side of the inverter housing 73 to cover the end surface 73 f. In the present embodiment, the base plate 25 protrudes radially outward from the cylindrical portion 14 and has a rectangular shape in the Y-axis direction when viewed in the axial direction. The negative side (−Y side) of the base plate 25 in the Y axis direction protrudes larger than the plus side. The cylindrical portion 14 and the base plate 25 of the motor housing 13 are an integrated object by drawing.
　図５は、電動オイルポンプの底面図である。ベースプレート２５のうち筒部１４の径方向外側には、図１及び図５に示すように、放射状に突出する複数のフランジ部２５ａが設けられる。本実施形態では、４つのフランジ部２５ａが周方向に間隔を有して設けられる。フランジ部２５ａには、ボルトを通すための固定孔部２５ｂが設けられる。固定孔部２５ｂは、電動オイルポンプ１を固定対象物に固定するためのボルトを通すための孔である。ベースプレート２５の固定孔部２５ｂと、インバータハウジング７３の固定孔部７７ａは連通する。 FIG. 5 is a bottom view of the electric oil pump. As shown in FIGS. 1 and 5, a plurality of flange portions 25 a projecting radially are provided outside the base plate 25 in the radial direction of the cylindrical portion 14. In the present embodiment, four flange portions 25a are provided at intervals in the circumferential direction. The flange portion 25a is provided with a fixing hole portion 25b for allowing the bolt to pass therethrough. The fixing hole portion 25b is a hole through which a bolt for fixing the electric oil pump 1 to a fixed object is passed. The fixing hole portion 25b of the base plate 25 and the fixing hole portion 77a of the inverter housing 73 communicate with each other.
　また、図示しないが、インバータハウジング７３の開口部を覆うカバー部９０には、インバータハウジング７３の固定孔部７７ａに連通する孔部が設けられる。このため、インバータハウジング７３及びカバー部９０は、ベースプレート２５に通されたボルトを介して共締めされて一体的に結合される。 Although not shown, the cover 90 that covers the opening of the inverter housing 73 is provided with a hole that communicates with the fixing hole 77 a of the inverter housing 73. For this reason, the inverter housing 73 and the cover part 90 are fastened together via a bolt passed through the base plate 25 and are integrally coupled.
　（固定部材３０）
　ベースプレート２５は、図１及び図５に示すように、ベースプレート２５に一体的に設けられてインバータハウジング７３を少なくとも軸方向に固定する固定部材３０を有する。固定部材３０は、軸方向視においてベースプレート２５の径方向外側へ延びる方向に対して交差する方向のベースプレート２５の両側の端部に位置する。 (Fixing member 30)
As shown in FIGS. 1 and 5, the base plate 25 includes a fixing member 30 that is provided integrally with the base plate 25 and fixes the inverter housing 73 at least in the axial direction. The fixing member 30 is located at both ends of the base plate 25 in a direction intersecting with a direction extending outward in the radial direction of the base plate 25 when viewed in the axial direction.
　本実施形態では、固定部材３０は、ベースプレート２５のＸ軸方向両端部であって、筒部１４の径方向外側の位置及び筒部１４のＹ軸方向マイナス側に位置するフランジ部２５ａに近接した位置に設けられる。つまり、固定部材３０は、ベースプレート２５のＸ軸方向両端部に２ヶ所ずつ、合計４か所設けられる。ベースプレート２５のＸ軸方向一方側に設けられる固定部材３０と、ベースプレート２５のＸ軸方向他方側に設けられる固定部材３０は、中心軸Ｊと交差してＹ軸方向に延びる仮想線Ａに対して対向して配置される。 In the present embodiment, the fixing member 30 is close to the flange portion 25a located at both ends of the base plate 25 in the X-axis direction, on the radially outer side of the cylindrical portion 14 and on the negative side of the cylindrical portion 14 in the Y-axis direction. Provided in position. That is, a total of four fixing members 30 are provided at two positions on both ends of the base plate 25 in the X-axis direction. The fixing member 30 provided on one side of the base plate 25 in the X-axis direction and the fixing member 30 provided on the other side of the base plate 25 in the X-axis direction intersect the virtual axis A that intersects the central axis J and extends in the Y-axis direction. Opposed to each other.
　固定部材３０は、図３及び図４に示すように、ベースプレート２５の両側の端部の夫々から突出する加締め部３１を有する。加締め部３１は、ベースプレート２５に対して軸方向他方側（リア側）へ折れ曲がり、且つ凹部７３ｅ内に折れ曲がっている事により、インバータハウジング７３をベースプレート２５に固定する。加締め部３１は、凹部７３ｅ内に折れ曲がった状態で面部７３ｅ１に接触している。このため、加締め部３１によって、インバータハウジング７３をベースプレート２５に対して少なくとも軸方向に固定することができる。 The fixing member 30 has a caulking portion 31 protruding from each of the end portions on both sides of the base plate 25, as shown in FIGS. The caulking portion 31 is bent to the other side (rear side) in the axial direction with respect to the base plate 25 and is bent into the recess 73e, thereby fixing the inverter housing 73 to the base plate 25. The caulking portion 31 is in contact with the surface portion 73e1 while being bent in the recess 73e. For this reason, the inverter housing 73 can be fixed to the base plate 25 at least in the axial direction by the caulking portion 31.
　なお、加締め部３１は、図３に示すように、凹部７３ｅ内に折れ曲がった状態で面部７３ｅ１に接触し、且つ加締め部３１の先端部が破線で示すように軸方向一方側（フロント側）へ更に折れ曲がった状態になってもよい。この場合には、ベースプレート２５に対してインバータハウジング７３がＸ軸方向に移動するガタをより抑制することができる。 As shown in FIG. 3, the caulking portion 31 is in contact with the surface portion 73e1 while being bent in the recess 73e, and the front end portion of the caulking portion 31 is indicated on the one side in the axial direction (front side). ) May be bent further. In this case, the backlash that the inverter housing 73 moves in the X-axis direction with respect to the base plate 25 can be further suppressed.
　また、加締め部３１は、図５に示すように、ベースプレート２５のＸ軸方向の両側端部に設けられているので、加締め部３１でインバータハウジング７３を固定すると、インバータハウジング７３をベースプレート２５にガタつきなく強固に固定することができる。 Further, as shown in FIG. 5, the caulking portion 31 is provided at both end portions in the X-axis direction of the base plate 25. Therefore, when the inverter housing 73 is fixed by the caulking portion 31, the inverter housing 73 is attached to the base plate 25. It can be firmly fixed without rattling.
　加締め部３１は、図４に示すように、凹部７３ｅの面部７３ｅ１に接触した状態において、加締め部３１の幅方向両側の端部の夫々が凹部７３ｅの一対の側面部７３ｅ２に対向する位置に配置される。このため、加締め部３１を凹部７３ｅ内に折り曲げる際に、加締め部３１が凹部７３ｅの側面部７３ｅ２に接触することを抑制することができる。また、ベースプレート２５に対してインバータハウジング７３の位置がＹ軸方向にずれた場合、加締め部３１の幅方向両側の端部が凹部７３ｅの側面部７３ｅ２に接触して、インバータハウジング７３のＹ軸方向のずれを抑えることができる。 As shown in FIG. 4, the caulking portion 31 is in a position in which the end portions on both sides in the width direction of the caulking portion 31 face the pair of side surface portions 73 e 2 of the concave portion 73 e in a state where the caulking portion 31 is in contact with the surface portion 73 e 1 of the concave portion 73 e. Placed in. For this reason, when the crimping part 31 is bent in the recessed part 73e, it can suppress that the crimping part 31 contacts the side part 73e2 of the recessed part 73e. Further, when the position of the inverter housing 73 is shifted in the Y-axis direction with respect to the base plate 25, the end portions on both sides in the width direction of the caulking portion 31 come into contact with the side surface portion 73e2 of the recess 73e, and the Y-axis of the inverter housing 73 Directional deviation can be suppressed.
（ロータ２０）
　ロータ２０は、図２に示すように、ロータコア２０ａと、ロータマグネット２０ｂと、を有する。ロータコア２０ａは、シャフト１１を軸周り（θ方向）に囲んで、シャフト１１に固定される。ロータマグネット２０ｂは、ロータコア２０ａの軸周り（θ方向）に沿った外側面に固定される。ロータコア２０ａ及びロータマグネット２０ｂは、シャフト１１と共に回転する。なお、ロータ２０は、ロータ２０の内部に永久磁石が埋め込まれた埋込磁石型でもよい。埋込磁石型のロータ２０は、永久磁石をロータ２０の表面に設けた表面磁石型と比較して、遠心力によって磁石が剥がれることを軽減することができ、また、リラクタンストルクを積極的に利用することができる。 (Rotor 20)
As shown in FIG. 2, the rotor 20 has a rotor core 20a and a rotor magnet 20b. The rotor core 20a is fixed to the shaft 11 so as to surround the shaft 11 around the axis (θ direction). The rotor magnet 20b is fixed to the outer surface along the axis (θ direction) of the rotor core 20a. The rotor core 20a and the rotor magnet 20b rotate together with the shaft 11. The rotor 20 may be an embedded magnet type in which a permanent magnet is embedded in the rotor 20. Compared with the surface magnet type in which the permanent magnet type rotor 20 is provided on the surface of the rotor 20, the embedded magnet type rotor 20 can reduce the peeling of the magnet due to centrifugal force, and actively uses the reluctance torque. can do.
（ステータ２２）
　ステータ２２は、ロータ２０を軸周り（θ方向）に囲み、ロータ２０を中心軸Ｊ周りに回転させる。ステータ２２は、コアバック部２２ａと、ティース部２２ｃと、コイル２２ｂと、インシュレータ（ボビン）２２ｄと、を有する。 (Stator 22)
The stator 22 surrounds the rotor 20 around the axis (θ direction), and rotates the rotor 20 around the central axis J. The stator 22 includes a core back portion 22a, a teeth portion 22c, a coil 22b, and an insulator (bobbin) 22d.
　コアバック部２２ａの形状は、シャフト１１と同心の円筒状である。ティース部２２ｃは、コアバック部２２ａの内側面からシャフト１１に向かって延びる。ティース部２２ｃは、複数設けられ、コアバック部２２ａの内側面の周方向に均等な間隔で配置される。コイル２２ｂは、インシュレータ（ボビン）２２ｄの周囲に設けられる。インシュレータ（ボビン）２２ｄは、各ティース部２２ｃに装着される。 The shape of the core back portion 22a is a cylindrical shape concentric with the shaft 11. The teeth part 22c extends toward the shaft 11 from the inner surface of the core back part 22a. A plurality of teeth portions 22c are provided, and are arranged at equal intervals in the circumferential direction of the inner surface of the core back portion 22a. The coil 22b is provided around the insulator (bobbin) 22d. An insulator (bobbin) 22d is attached to each tooth portion 22c.
（シャフト１１）
　シャフト１１は、図２に示すように、中心軸Ｊに沿って延びてモータ部１０を貫通する。シャフト１１のフロント側（－Ｚ側）は、モータ部１０から突出してベアリング１７で支持されてポンプ部４０内に延びる。シャフト１１のリア側（＋Ｚ側）は、ロータ２０から突出してベアリング１６で支持される。このため、ロータ２０は、両端支持の状態となる。 (Shaft 11)
As shown in FIG. 2, the shaft 11 extends along the central axis J and penetrates the motor unit 10. The front side (−Z side) of the shaft 11 protrudes from the motor unit 10, is supported by the bearing 17, and extends into the pump unit 40. The rear side (+ Z side) of the shaft 11 protrudes from the rotor 20 and is supported by the bearing 16. For this reason, the rotor 20 is in a state where both ends are supported.
＜ポンプ部４０＞
　ポンプ部４０は、図２に示すように、モータ部１０の軸方向一方側、詳細にはフロント側（－Ｚ側）に位置する。ポンプ部４０は、モータ部１０によってシャフト１１を介して駆動される。ポンプ部４０は、ポンプロータ４７と、ポンプハウジング５１と、を有する。ポンプハウジング５１は、ポンプボディ５２と、ポンプカバー５７と、を有する。以下、各部品について詳細に説明する。 <Pump unit 40>
As shown in FIG. 2, the pump unit 40 is located on one axial side of the motor unit 10, specifically, on the front side (−Z side). The pump unit 40 is driven through the shaft 11 by the motor unit 10. The pump unit 40 includes a pump rotor 47 and a pump housing 51. The pump housing 51 includes a pump body 52 and a pump cover 57. Hereinafter, each component will be described in detail.
（ポンプボディ５２）
　ポンプボディ５２は、モータ部１０のフロント側（－Ｚ側）においてモータハウジング１３のフロント側（－Ｚ側）に固定される。ポンプボディ５２は、リア側（＋Ｚ側）の面からフロント側（－Ｚ側）に窪む凹部５４を有する。凹部５４内にはベアリング１７及びシール部材１８が収容される。ポンプボディ５２は、ポンプロータ４７の周面に対向する側面５３ａ及びポンプ部４０のリア側（＋Ｚ側）に位置する底面５３ｂを有する収容部５３を有する。収容部５３は、フロント側（－Ｚ側）に開口してリア側（＋Ｚ側）に窪む。収容部５３の軸方向から視た形状は、円形状である。 (Pump body 52)
The pump body 52 is fixed to the front side (−Z side) of the motor housing 13 on the front side (−Z side) of the motor unit 10. The pump body 52 has a recess 54 that is recessed from the rear side (+ Z side) surface to the front side (−Z side). The bearing 17 and the seal member 18 are accommodated in the recess 54. The pump body 52 has a housing portion 53 having a side surface 53 a that faces the peripheral surface of the pump rotor 47 and a bottom surface 53 b that is located on the rear side (+ Z side) of the pump portion 40. The accommodating portion 53 opens to the front side (−Z side) and is recessed to the rear side (+ Z side). The shape of the accommodating portion 53 viewed from the axial direction is a circular shape.
　ポンプカバー５７は、図２に示すように、ポンプボディ５２に対してフロント側（－Ｚ側）から覆うことで、ポンプボディ５２との間に収容部５３を設ける。 As shown in FIG. 2, the pump cover 57 covers the pump body 52 from the front side (−Z side), thereby providing an accommodating portion 53 between the pump body 52 and the pump cover 52.
　ポンプボディ５２は、中心軸Ｊに沿って貫通する貫通孔５５を有する。貫通孔５５は軸方向両端が開口してシャフト１１が通され、リア側（＋Ｚ側）の開口が凹部５４に開口し、フロント側（－Ｚ側）の開口が収容部５３に開口する。貫通孔５５は、シャフト１１を回転可能に支持するすべり軸受４５として機能する。 The pump body 52 has a through hole 55 penetrating along the central axis J. Through-holes 55 are open at both ends in the axial direction to allow the shaft 11 to pass therethrough, a rear side (+ Z side) opening is opened in the recess 54, and a front side (−Z side) opening is opened in the accommodating portion 53. The through hole 55 functions as a slide bearing 45 that supports the shaft 11 rotatably.
　ポンプボディ５２の外側の側面には、図１に示すように、径方向外側へ突出するとともに軸方向に延びるポンプ側フランジ部５２ａが設けられる。ポンプ側フランジ部５２ａは、周方向に間隔を有して複数設けられる。ポンプ側フランジ部５２ａは、軸方向に貫通する貫通孔（図示せず）が設けられる。この貫通孔に通されたボルト５６を介して、ポンプボディ５２がモータハウジング１３に着脱可能に固定される。 As shown in FIG. 1, a pump-side flange portion 52 a that protrudes radially outward and extends in the axial direction is provided on the outer side surface of the pump body 52. A plurality of the pump-side flange portions 52a are provided at intervals in the circumferential direction. The pump side flange portion 52a is provided with a through hole (not shown) penetrating in the axial direction. The pump body 52 is detachably fixed to the motor housing 13 through a bolt 56 passed through the through hole.
（ポンプカバー５７）
　ポンプカバー５７は、図１及び図２に示すように、軸方向一方側（フロント側）に設けられた端面５８と、端面５８の周縁部に繋がって軸方向他方側へ延びる筒状の側面６１と、を有する。端面５８及び側面６１のいずれか一方に吸入口６３が設けられ、端面５８及び側面６１のいずれか他方に吐出口６４が設けられる。本実施形態では、端面５８は、軸方向視において円形状である。吸入口６３は、端面５８に設けられる。吐出口６４は、側面６１に設けられる。吸入口６３は、端面の径方向一方側の周縁部に配置され、吐出口６４は、中心軸Ｊに対して吸入口６３と対向する位置に配置される。 (Pump cover 57)
As shown in FIGS. 1 and 2, the pump cover 57 includes an end surface 58 provided on one side (front side) in the axial direction, and a cylindrical side surface 61 that is connected to the peripheral portion of the end surface 58 and extends to the other side in the axial direction. And having. A suction port 63 is provided on one of the end surface 58 and the side surface 61, and a discharge port 64 is provided on the other of the end surface 58 and the side surface 61. In the present embodiment, the end surface 58 has a circular shape when viewed in the axial direction. The suction port 63 is provided on the end surface 58. The discharge port 64 is provided on the side surface 61. The suction port 63 is disposed at a peripheral portion on one side in the radial direction of the end surface, and the discharge port 64 is disposed at a position facing the suction port 63 with respect to the central axis J.
　吸入口６３は、軸方向視において円形状である。吐出口６４は、側面６１の周方向に延びる長孔状である。吐出口６４の開口面積は、吸入口６３の開口面積と同一である。なお、吐出口６４の開口面積は、吸入口６３の開口面積よりも僅かに小さくてもよい。吐出口６４は、側面６１の軸方向一方側の端部から軸方向他方側へ所定距離を有した位置に配置される。側面６１のうち軸方向一方側の端部と吐出口６４との間には、オイルを吸入口６３に供給する供給油路を側面６１に密着させるシール部材６６が環状に設けられる。 The suction port 63 has a circular shape when viewed in the axial direction. The discharge port 64 has a long hole shape extending in the circumferential direction of the side surface 61. The opening area of the discharge port 64 is the same as the opening area of the suction port 63. The opening area of the discharge port 64 may be slightly smaller than the opening area of the suction port 63. The discharge port 64 is disposed at a position having a predetermined distance from the end on one side in the axial direction of the side surface 61 to the other side in the axial direction. Between the end portion on the one side in the axial direction of the side surface 61 and the discharge port 64, a sealing member 66 is provided in an annular shape so that a supply oil passage for supplying oil to the suction port 63 is in close contact with the side surface 61.
　なお、前述した実施形態では、端面に吸入口を設け、側面に吐出口を設けた場合を示したが、これに限るものではない。たとえば、端面に吐出口を設け、側面に吸入口を設けてもよい。この場合、吸入口及び吐出口の相対位置、開口部の面積は、前述した実施形態と同様である。 In the above-described embodiment, the case where the suction port is provided on the end surface and the discharge port is provided on the side surface is shown, but the present invention is not limited to this. For example, the discharge port may be provided on the end surface, and the suction port may be provided on the side surface. In this case, the relative positions of the suction port and the discharge port and the area of the opening are the same as in the above-described embodiment.
（ポンプロータ４７）
　ポンプロータ４７は、シャフト１１に取り付けられる。より詳細には、ポンプロータ４７は、シャフト１１のフロント側（－Ｚ側）に取り付けられる。ポンプロータ４７は、シャフト１１に取り付けられるインナーロータ４７ａと、インナーロータ４７ａの径方向外側を囲むアウターロータ４７ｂと、を有する。インナーロータ４７ａは、円環状である。インナーロータ４７ａは、径方向外側面に歯を有する歯車である。 (Pump rotor 47)
The pump rotor 47 is attached to the shaft 11. More specifically, the pump rotor 47 is attached to the front side (−Z side) of the shaft 11. The pump rotor 47 includes an inner rotor 47a attached to the shaft 11 and an outer rotor 47b surrounding the radially outer side of the inner rotor 47a. The inner rotor 47a is annular. The inner rotor 47a is a gear having teeth on the radially outer surface.
　インナーロータ４７ａは、シャフト１１に固定される。より詳細には、インナーロータ４７ａの内側にシャフト１１のフロント側（－Ｚ側）の端部が圧入される。インナーロータ４７ａは、シャフト１１と共に軸周り（θ方向）に回転する。アウターロータ４７ｂは、インナーロータ４７ａの径方向外側を囲む円環状である。アウターロータ４７ｂは、径方向内側面に歯を有する歯車である。 The inner rotor 47a is fixed to the shaft 11. More specifically, the front side (−Z side) end of the shaft 11 is press-fitted inside the inner rotor 47a. The inner rotor 47a rotates around the axis (θ direction) together with the shaft 11. The outer rotor 47b has an annular shape surrounding the radially outer side of the inner rotor 47a. The outer rotor 47b is a gear having teeth on the radially inner side surface.
　インナーロータ４７ａとアウターロータ４７ｂとは互いに噛み合い、インナーロータ４７ａが回転することでアウターロータ４７ｂが回転する。すなわち、シャフト１１の回転によりポンプロータ４７は回転する。言い換えると、モータ部１０とポンプ部４０とは同一の回転軸を有する。これにより、電動オイルポンプ１が軸方向に大型化することを抑制できる。 The inner rotor 47a and the outer rotor 47b mesh with each other, and the outer rotor 47b rotates as the inner rotor 47a rotates. That is, the pump rotor 47 is rotated by the rotation of the shaft 11. In other words, the motor unit 10 and the pump unit 40 have the same rotation axis. Thereby, it can suppress that the electric oil pump 1 enlarges to an axial direction.
　また、インナーロータ４７ａとアウターロータ４７ｂとが回転することで、インナーロータ４７ａとアウターロータ４７ｂの噛み合わせ部分の間の容積が変化する。容積が減少する領域が加圧領域となり、容積が増加する領域が負圧領域となる。ポンプロータ４７の負圧領域のリア側（＋Ｚ側）には、吸入ポート６３ａが配置される。また、ポンプロータ４７の加圧領域のリア側（＋Ｚ側）には、吐出ポート６４ａが配置される。ここで、ポンプカバー５７に設けられた吸入口６３から収容部５３内に吸入されるオイルは、インナーロータ４７ａとアウターロータ４７ｂの間の容積部分に収容され、加圧領域に送られる。その後、オイルは、吐出ポート６４ａを通って吐出口６４から吐出される。 Also, as the inner rotor 47a and the outer rotor 47b rotate, the volume between the meshing portions of the inner rotor 47a and the outer rotor 47b changes. A region where the volume decreases is a pressurizing region, and a region where the volume increases is a negative pressure region. A suction port 63 a is disposed on the rear side (+ Z side) of the negative pressure region of the pump rotor 47. Further, a discharge port 64 a is disposed on the rear side (+ Z side) of the pressurizing region of the pump rotor 47. Here, the oil sucked into the accommodating portion 53 from the suction port 63 provided in the pump cover 57 is accommodated in a volume portion between the inner rotor 47a and the outer rotor 47b and sent to the pressurizing region. Thereafter, the oil is discharged from the discharge port 64 through the discharge port 64a.
＜電動オイルポンプ１の作用・効果＞
　次に、電動オイルポンプ１の作用・効果について説明する。図２に示すように、電動オイルポンプ１のモータ部１０が駆動すると、モータ部１０のシャフト１１が回転して、ポンプロータ４７のインナーロータ４７ａの回転にともなってアウターロータ４７ｂも回転する。ポンプロータ４７が回転すると、ポンプ部４０の吸入口６３から吸引されたオイルは、ポンプ部４０の収容部５３内を移動して、吐出ポート６４ａを通って吐出口６４から吐出される。 <Operation and effect of electric oil pump 1>
Next, the operation and effect of the electric oil pump 1 will be described. As shown in FIG. 2, when the motor unit 10 of the electric oil pump 1 is driven, the shaft 11 of the motor unit 10 rotates, and the outer rotor 47 b rotates as the inner rotor 47 a of the pump rotor 47 rotates. When the pump rotor 47 rotates, the oil sucked from the suction port 63 of the pump unit 40 moves in the housing unit 53 of the pump unit 40 and is discharged from the discharge port 64 through the discharge port 64a.
（１）ここで、本実施形態に係る電動オイルポンプ１のポンプカバー５７は、図１に示すように、端面５８及び側面６１のいずれか一方に吸入口６３が設けられ、端面５８及び側面６１のいずれか他方に吐出口６４が設けられる。このため、吸入口６３及び吐出口６４は離れた位置にあるので、吸入口６３及び吐出口６４が近接した位置に配置される場合と比較して、吸入口６３及び吐出口６４の位置を軸方向にずらす必要がない。このため、吸入口６３及び吐出口６４の夫々に油路を直接に接続することができるので、電動オイルポンプ１の軸方向の大きさの増大を抑制することができる。 (1) Here, as shown in FIG. 1, the pump cover 57 of the electric oil pump 1 according to the present embodiment is provided with a suction port 63 on one of the end surface 58 and the side surface 61, and the end surface 58 and the side surface 61. One of the other is provided with a discharge port 64. For this reason, since the suction port 63 and the discharge port 64 are located away from each other, the positions of the suction port 63 and the discharge port 64 are compared with the case where the suction port 63 and the discharge port 64 are disposed in close proximity. There is no need to shift the direction. For this reason, since the oil passage can be directly connected to each of the suction port 63 and the discharge port 64, an increase in the size of the electric oil pump 1 in the axial direction can be suppressed.
（２）また、吸入口６３は、端面５８の径方向一方側の周縁部に配置され、吐出口６４は、中心軸Ｊに対して吸入口６３と対向する位置に配置される。このため、吸入口６３及び吐出口６４の相対位置を離れた位置に配置することができる。このため、吸入口６３及び吐出口６４の夫々に油路を接続する際の作業性を容易にすることができる。 (2) Further, the suction port 63 is disposed at a peripheral portion on one side in the radial direction of the end surface 58, and the discharge port 64 is disposed at a position facing the suction port 63 with respect to the central axis J. For this reason, the relative positions of the suction port 63 and the discharge port 64 can be arranged at positions separated from each other. For this reason, the workability | operativity at the time of connecting an oil path to each of the suction inlet 63 and the discharge outlet 64 can be made easy.
（３）また、吸入口６３は、軸方向視において円形状であり、吐出口６４は、側面６１の周方向に延びる長孔状である。吸入口６３と吐出口６４の形状が相違するので、それぞれに対応する油路を誤って接続する誤操作を防止することができる。 (3) The suction port 63 has a circular shape when viewed in the axial direction, and the discharge port 64 has a long hole shape extending in the circumferential direction of the side surface 61. Since the shapes of the suction port 63 and the discharge port 64 are different, it is possible to prevent an erroneous operation of erroneously connecting the corresponding oil passages.
（４）また、吐出口６４の開口面積は、吸入口６３の開口面積と同一又は僅かに小さい。このため、吸入口６３から吸入されたオイルが吐出口６４を流れる際に、圧力損失の低下を抑制して、吐出口６４から流出するオイルの流量低下を防止することができる。 (4) The opening area of the discharge port 64 is the same as or slightly smaller than the opening area of the suction port 63. For this reason, when the oil sucked from the suction port 63 flows through the discharge port 64, it is possible to suppress a decrease in pressure loss and prevent a decrease in the flow rate of the oil flowing out from the discharge port 64.
（５）また、側面６１のうち軸方向一方側の端部と吐出口６４との間には、オイルを吸入口６３に供給する供給油路を側面に密着させるシール部材６６が環状に設けられる。このため、吸入口６３にオイルを供給するための油路を側面６１に密着させた状態でポンプカバー５７に接続することができる。このため、空気の侵入を防止することができ、吸入口６３に吸入されるオイルの流量低下を防止することができる。 (5) In addition, a seal member 66 is provided in an annular shape between the end on one side in the axial direction of the side surface 61 and the discharge port 64 so that the supply oil passage for supplying oil to the suction port 63 is in close contact with the side surface. . For this reason, the oil passage for supplying oil to the suction port 63 can be connected to the pump cover 57 in a state of being in close contact with the side surface 61. For this reason, intrusion of air can be prevented, and a decrease in the flow rate of oil sucked into the suction port 63 can be prevented.
　以上、本発明の好ましい実施形態について説明したが、本発明は、これらの実施形態に限定されず、その要旨の範囲内で種々の変形および変更が可能である。これらの実施形態及びその変形は、発明の範囲及び要旨に含まれると同時に、特許請求の範囲に記載された発名とその均等の範囲に含まれる。 As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary. These embodiments and modifications thereof are included in the scope and gist of the invention, and at the same time, are included in the names of claims and their equivalents.
　本出願は、２０１８年４月２４日に出願された日本特許出願である特願２０１８－８３４１５号に基づく優先権を主張し、当該日本特許出願のすべての記載内容を援用する。 This application claims priority based on Japanese Patent Application No. 2018-83415, which is a Japanese patent application filed on April 24, 2018, and uses the entire contents of the Japanese patent application.
　　１　電動オイルポンプ
　１０　モータ部
　１１　シャフト
　１３　モータハウジング
　２０　ロータ
　２２　ステータ
　４０　ポンプ部
　４７　ポンプロータ
　５１　ポンプハウジング
　５２　ポンピボディ
　５３　収容部
　５７　ポンプカバー
　５８　端面
　６１　側面
　６３　吸入口
　６４　吐出口
　６６　シール部材
　７３　インバータハウジング
　　Ｊ　中心軸

  DESCRIPTION OF SYMBOLS 1 Electric oil pump 10 Motor part 11 Shaft 13 Motor housing 20 Rotor 22 Stator 40 Pump part 47 Pump rotor 51 Pump housing 52 Pump body 53 Housing part 57 Pump cover 58 End surface 61 Side surface 63 Inlet port 64 Outlet port 66 Seal member 73 Inverter housing J Central axis

Claims (5)

  1. 　軸方向に延びる中心軸を中心とするシャフトを有するモータ部と、
    　前記モータ部の軸方向一方側に位置し、前記モータ部によって前記シャフトを介して駆動されオイルを吐出するポンプ部と、
    　前記モータ部の軸方向他方側に位置して前記モータ部に固定されるインバータ部と、
    を有し、
    　前記モータ部は、
    　　前記シャフトの軸方向他方側に固定されるロータと、
    　　前記ロータの径方向外側に位置するステータと、
    　　前記ロータ及び前記ステータを収容するモータハウジングと、
    を有し、
    　前記ポンプ部は、
    　　前記モータ部から軸方向一方側に突出する前記シャフトに取り付けられるポンプロータと、
    　　前記オイルを吸入する吸入口と、前記オイルを吐出する吐出口とが設けられ、前記ポンプロータを収容するポンプハウジングと、
    を有し、
    　前記ポンプハウジングは、
    　　前記ポンプロータを収容する収容部を有するポンプボディと、
    　　前記ポンプボディの軸方向一方側に取り付けられるポンプカバーと、を有し、
    　前記ポンプカバーは、
    　　軸方向一方側に設けられた端面と、
    　　前記端面の周縁部に繋がって軸方向他方側へ延びる筒状の側面と、を有し、
    　前記端面及び前記側面のいずれか一方に前記吸入口が設けられ、前記端面及び前記側面のいずれか他方に前記吐出口が設けられる
    電動オイルポンプ。     A motor unit having a shaft centered on a central axis extending in the axial direction;
    A pump unit located on one axial side of the motor unit and driven by the motor unit via the shaft to discharge oil;
    An inverter unit positioned on the other axial side of the motor unit and fixed to the motor unit;
    Have
    The motor part is
    A rotor fixed to the other axial side of the shaft;
    A stator located radially outside the rotor;
    A motor housing that houses the rotor and the stator;
    Have
    The pump part is
    A pump rotor attached to the shaft projecting axially from the motor part;
    A pump housing provided with a suction port for sucking the oil and a discharge port for discharging the oil, and housing the pump rotor;
    Have
    The pump housing is
    A pump body having an accommodating portion for accommodating the pump rotor;
    A pump cover attached to one axial side of the pump body,
    The pump cover is
    An end face provided on one side in the axial direction;
    A cylindrical side surface connected to the peripheral edge of the end surface and extending to the other side in the axial direction,
    An electric oil pump in which the suction port is provided in one of the end surface and the side surface, and the discharge port is provided in the other of the end surface and the side surface.
  2. 　前記端面は、軸方向視において円形状であり、
    　前記吸入口は、前記端面に設けられ、
    　前記吐出口は、前記側面に設けられ、
    　前記吸入口は、前記端面の径方向一方側の周縁部に配置され、
    　前記吐出口は、前記中心軸に対して前記吸入口と対向する位置に配置される
    請求項１に記載の電動オイルポンプ。     The end surface is circular when viewed in the axial direction,
    The inlet is provided in the end face;
    The discharge port is provided on the side surface,
    The suction port is disposed at a peripheral edge portion on one side in the radial direction of the end surface,
    The electric oil pump according to claim 1, wherein the discharge port is disposed at a position facing the suction port with respect to the central axis.
  3. 　前記吸入口は、軸方向視において円形状であり、
    　前記吐出口は、前記側面の周方向に延びる長孔状である
    請求項２に記載の電動オイルポンプ。     The suction port is circular when viewed in the axial direction;
    The electric oil pump according to claim 2, wherein the discharge port has a long hole shape extending in a circumferential direction of the side surface.
  4. 　前記吐出口の開口面積は、前記吸入口の開口面積と同一又は僅かに小さい
    請求項３に記載の電動オイルポンプ。     The electric oil pump according to claim 3, wherein an opening area of the discharge port is the same as or slightly smaller than an opening area of the suction port.
  5. 　前記吐出口は、前記側面の軸方向一方側の端部から軸方向他方側へ所定距離を有した位置に配置され、
    　前記側面のうち軸方向一方側の前記端部と前記吐出口との間には、前記オイルを前記吸入口に供給する供給油路を前記側面に密着させるシール部材が環状に設けられる
    請求項４に記載の電動オイルポンプ。

          The discharge port is disposed at a position having a predetermined distance from an end portion on one side in the axial direction of the side surface to the other side in the axial direction.
    5. A seal member that annularly provides a supply oil passage for supplying the oil to the suction port to the side surface is provided between the end portion on one axial side of the side surface and the discharge port. The electric oil pump described in 1.

PCT/JP2019/013338 2018-04-24 2019-03-27 Electric oil pump WO2019208078A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013241837A (en) * 2012-05-17 2013-12-05 Aisin Seiki Co Ltd Electric pump
JP2015172350A (en) * 2014-03-12 2015-10-01 日立オートモティブシステムズ株式会社 electric oil pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013241837A (en) * 2012-05-17 2013-12-05 Aisin Seiki Co Ltd Electric pump
JP2015172350A (en) * 2014-03-12 2015-10-01 日立オートモティブシステムズ株式会社 electric oil pump

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