EP2476904A1 - Elektropumpeneinheit - Google Patents

Elektropumpeneinheit Download PDF

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Publication number
EP2476904A1
EP2476904A1 EP10815443A EP10815443A EP2476904A1 EP 2476904 A1 EP2476904 A1 EP 2476904A1 EP 10815443 A EP10815443 A EP 10815443A EP 10815443 A EP10815443 A EP 10815443A EP 2476904 A1 EP2476904 A1 EP 2476904A1
Authority
EP
European Patent Office
Prior art keywords
pump
rotor
motor
outer rotor
permanent magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10815443A
Other languages
English (en)
French (fr)
Other versions
EP2476904A4 (de
Inventor
Takatoshi Sakata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
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 JTEKT Corp filed Critical JTEKT Corp
Publication of EP2476904A1 publication Critical patent/EP2476904A1/de
Publication of EP2476904A4 publication Critical patent/EP2476904A4/de
Withdrawn legal-status Critical Current

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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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • 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
    • F04C2240/00—Components
    • F04C2240/40—Electric motor

Definitions

  • the invention relates to an electric pump unit that is used as a hydraulic pump that supplies hydraulic pressure to, for example, a transmission (speed change gear), or the like, of an automobile.
  • an electric pump unit is used as a hydraulic pump of an automobile in order to achieve energy saving by minutely controlling start and stop of the electric pump unit and to ensure hydraulic pressure supplied to a drive train, such as a transmission, even during a stop of an engine through an idle stop (idling stop).
  • An electric pump unit for an automobile is mounted in a limited space of a vehicle body, so the electric pump unit is required to be compactified, and also required to be light in weight and reduced in cost.
  • an electric pump unit in response to this request such that a pump, a pump driving electric motor and a controller of the motor are integrally assembled in a common unit housing (for example, see Patent Document 1).
  • Patent Document 1 Japanese Patent Application Publication No. 2008-215088
  • the pump and the motor are coupled via a motor shaft and are aligned in the axial direction, so the size in the axial direction is large, and there is a limit of compactification.
  • One object of the invention is to provide an electric pump unit that may be compactified and that may be reduced in weight and cost.
  • An electric pump unit is configured such that a pump chamber having a fluid suction port and a fluid discharge port is formed on an inner side of a motor stator that is fixedly provided on an inner periphery of a synthetic resin unit housing and only part of an inner peripheral side of which is exposed to an inside of the unit housing, a pump outer rotor is arranged on an inner side of the motor stator in the pump chamber so as to be able to rotate using an inner periphery of the motor stator as a guide, a pump inner rotor that is supported for rotation by the unit housing is arranged on an inner side of the pump outer rotor, and a motor rotor is formed such that a permanent magnet is held by a synthetic resin permanent magnet holding portion that is provided by integral molding on an outer periphery of the pump outer rotor.
  • FIG 1 is a longitudinal sectional view of an electric pump unit. Note that, in the following description, the left side in FIG 1 is defined as front side, and the right side is defined as rear side.
  • the electric pump unit is formed such that a pump and a pump driving electric motor are integrally assembled in a unit housing 1 made of synthetic resin.
  • the pump is an internal gear pump
  • the motor is a DC brushless motor having three-phase coils.
  • a controller (not shown) of the motor is provided separately from the electric pump unit.
  • the housing 1 is formed of a rear-side housing body 2 and a front-side lid 3.
  • the housing body 2 has a cylindrical shape such that the rear end of a cylindrical portion 2a is closed by a rear wall 2b and a front portion is open.
  • a short cylindrical portion 2c that has an outside diameter smaller than the bore diameter of the cylindrical portion 2a and that is concentric with the cylindrical portion 2a is integrally formed at the center of the front surface (inner surface) of the rear wall 2b.
  • the lid 3 has a disc shape, and a short cylindrical portion 3a that is concentric with the short cylindrical portion 2c of the housing body 2 and that has an outside diameter equal to the outside diameter of the short cylindrical portion 2c is integrally formed at the center of the rear surface (inner surface) of the lid 3.
  • the outer peripheral portion of the lid 3 is fixed to the front end surface of the cylindrical portion 2a of the housing body 2 via an 0 ring 4.
  • a connector is provided at an appropriate portion of the outer surface of the housing body 2.
  • a motor stator 5 is fixedly provided on the inner periphery of the cylindrical portion 2a of the housing body 2.
  • the stator 5 is formed such that a portion that includes the inner peripheral surface of a core 6 formed of laminated steel plate is covered with an insulator (insulator made of synthetic resin) 7, and coils 8 are wound around the portion of the insulator 7.
  • the coils 8 are connected to the connector (not shown).
  • the stator 5 is integrally molded on the inner periphery of the cylindrical portion 2a, the front portion of the insulator 7 and coils 8 is covered with an inward flange portion 2d that is formed integrally with the front end of the cylindrical portion 2a of the housing body 2, and the rear portion of the insulator 7 and coils 8 is covered with the rear wall 2b of the housing body 2.
  • the outer periphery of the portion of the insulator 7 on the front and rear sides of the core 6 is in close contact with the inner periphery of the cylindrical portion 2a
  • the inner periphery of the insulator 7 is in close contact with the outer periphery of the short cylindrical portion 3a of the lid 3 and the outer periphery of the short cylindrical portion 2c of the housing body 2
  • the inner periphery of the insulator 7 on the inner side of the core 6 is exposed to the inside of the housing 2.
  • a pump chamber 9 is formed on the inner side of the stator 5 between both short cylindrical portions 2c and 3a.
  • a pump outer rotor (outer gear) 10 is arranged on the inner side of the stator 5 inside the pump chamber 9 so as to be able to rotate using the inner periphery of the stator 5 as a guide, and a pump inner rotor (inner gear) 11 that is supported for rotation by the housing 2 and that is in mesh with the outer rotor 10 is arranged on the inner side of the outer rotor 10.
  • the outer rotor 10 is made of synthetic resin. Teeth 10a are formed on the inner periphery of the outer rotor 10, and a motor rotor 14 having permanent magnets 13 is provided on the outer periphery of the outer rotor 10.
  • the motor rotor 14 is formed such that the segmented permanent magnets 13 are held at multiple portions (eight portions in this example) that equally divide a synthetic resin permanent magnet holding portion 15, which is fixedly provided on the outer periphery of the outer rotor 10, in the circumferential direction.
  • the outer rotor 10 made of synthetic resin is integrally molded with the permanent magnet holding portion 15 in a state where a back yoke 16 made of an iron-based material is in-molded.
  • the permanent magnet holding portion 15 has an outward rib 15a that is integrally formed with the outer peripheral rear end of the outer rotor 10 and permanent magnet holding protrusions 15b that are integrally formed at multiple portions that equally divide the outer periphery of the outer rotor 10 in the circumferential direction and that extend from the front surface of the rib 15a to the front end of the outer rotor 10.
  • the outer peripheries of the protrusions 15b form a cylindrical surface as in the case of the rib 15a, and the diameters of both cylindrical surfaces are equal to each other.
  • Each protrusion 15b has a V-shaped cross-sectional shape, and the mutual space between the adjacent protrusions 15b gradually reduces radially outward.
  • each permanent magnet 13 in the circumferential direction also gradually reduces radially outward, and each permanent magnet 12 is inserted from the front side and held between the adjacent protrusions 15b.
  • the outer periphery of the rib 15a and the outer peripheries of the protrusions 15b are in slide contact with the inner periphery of the insulator 7 exposed to the inside of the housing 2, and the outer rotor 10 uses them as a guide to rotate.
  • the outer peripheral surface of the back yoke 16 in-molded in the outer rotor 10 is exposed from the outer rotor 10 between the adjacent protrusions 15b, that is, the portions at which the permanent magnets 13 are held.
  • the inner rotor 11 is made of synthetic resin or made of a sintered compact of an iron-based material. Both ends of a shaft 17 extending in the longitudinal direction are rotationally supported by the short cylindrical portion 3 a of the lid 3 and the short cylindrical portion 2c of the housing body 2, and the inner rotor 11 is fixed to the shaft 17. Teeth 11a are formed on the outer periphery of the inner rotor 11.
  • the lid 3 has an oil suction port 18 and an oil discharge port 19 that are in fluid communication with the pump chamber 9.
  • the electric motor is formed of the stator 5 and the rotor 14 of the outer rotor 10, and the pump is formed of the outer rotor 10 and the inner rotor 11.
  • the controller of the motor is arranged separately from the electric pump unit, and is connected to the motor via the connector (not shown) of the housing body 2.
  • the motor operates.
  • the outer rotor 10 integrated with the motor rotor 14 rotates, and the pump operates.
  • oil is introduced into the pump chamber 9 via the suction port 18, and is discharged via the discharge port 19.
  • the electric pump unit is configured such that the pump is arranged inside the motor stator 5 that constitutes the electric motor, so the size in the axial direction is small, and further compactification is possible.
  • the motor rotor 14 is integrated with the outer periphery of the pump outer rotor 10, so the number of components is small, and further reduction in weight and cost is possible.
  • the outer rotor 10 integrated with the motor rotor 14 is configured to rotate using the inner periphery of the motor stator 5 as a guide, so it is possible to properly keep the gap in the radial direction between the motor stator 5 and the permanent magnets 12 of the motor rotor 14.
  • the motor rotor 14 is formed such that the permanent magnets 13 are held by the synthetic resin permanent magnet holding member 15 that is formed by integral molding on the outer periphery of the outer rotor 10, so it is not necessary to fix the permanent magnets 13 to the outer rotor 10 by adhesive agent and, therefore, there is no possibility of peeling of the permanent magnets 13.
  • the outer periphery of the permanent magnet holding portion is guided by the inner periphery of the motor stator.
  • the back yoke made of an iron-based material is in-molded in the pump outer rotor that is integrally molded with the permanent magnet holding portion.
  • the overall configuration and configuration of portions of the electric pump unit are not limited to the ones of the above embodiment, and may be appropriately modified.
  • the invention may be applied to an electric pump unit other than the electric pump unit for an automobile.
  • the electric pump unit that introduces and discharges oil is described; however, the electric pump unit is not limited to this configuration.
  • the electric pump unit may introduce and discharge another fluid, such as water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP10815443.6A 2009-09-11 2010-09-10 Elektropumpeneinheit Withdrawn EP2476904A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009209992A JP2011058441A (ja) 2009-09-11 2009-09-11 電動ポンプユニット
PCT/JP2010/065611 WO2011030849A1 (ja) 2009-09-11 2010-09-10 電動ポンプユニット

Publications (2)

Publication Number Publication Date
EP2476904A1 true EP2476904A1 (de) 2012-07-18
EP2476904A4 EP2476904A4 (de) 2014-04-30

Family

ID=43732517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10815443.6A Withdrawn EP2476904A4 (de) 2009-09-11 2010-09-10 Elektropumpeneinheit

Country Status (5)

Country Link
US (1) US20120164009A1 (de)
EP (1) EP2476904A4 (de)
JP (1) JP2011058441A (de)
CN (1) CN102483059A (de)
WO (1) WO2011030849A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600130203A1 (it) * 2016-12-22 2018-06-22 Bosch Gmbh Robert Pompa elettrica a ingranaggi
CN109139462A (zh) * 2017-06-28 2019-01-04 阿特拉斯·科普柯空气动力股份有限公司 圆柱形对称容积式机器

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011077094A1 (de) * 2011-06-07 2012-12-13 Mahle International Gmbh Pendelschieberpumpe
FR2983248B1 (fr) * 2011-11-29 2015-04-03 Turbomeca Turbomachine comportant une pompe d'alimentation en carburant a activation electrique et procede d'alimentation en carburant d'une turbomachine
JP2014173443A (ja) * 2013-03-06 2014-09-22 Asmo Co Ltd 電動ポンプ
JP6081824B2 (ja) * 2013-03-06 2017-02-15 アスモ株式会社 電動ポンプ
EP3032722B1 (de) * 2014-12-11 2020-02-19 Johnson Electric International AG Rotor, motor, pumpe und reinigungsvorrichtung
ITUB20155909A1 (it) * 2015-11-25 2017-05-25 Bosch Gmbh Robert Pompa ad ingranaggi
IT201600125212A1 (it) * 2016-12-12 2018-06-12 Bosch Gmbh Robert Pompa elettrica a ingranaggi
IT201600129613A1 (it) * 2016-12-21 2018-06-21 Bosch Gmbh Robert Pompa elettrica a ingranaggi
BE1025570B1 (nl) * 2017-09-21 2019-04-17 Atlas Copco Airpower Naamloze Vennootschap Cilindrisch symmetrische volumetrische machine
CN111465762B (zh) * 2017-12-13 2022-06-07 罗伯特·博世有限公司 用于将燃料、优选柴油燃料供给到内燃机的泵送单元
DE102017223715A1 (de) 2017-12-22 2019-06-27 Magna Powertrain Bad Homburg GmbH Gerotorpumpe und Verfahren zur Herstellung einer solchen
US10927833B2 (en) * 2018-05-15 2021-02-23 Schaeffler Technologies AG & Co. KG Integrated eccentric motor and pump assembly
DE102019200560A1 (de) * 2018-09-14 2020-03-19 Magna Powertrain Bad Homburg GmbH Gerotorpumpe und Verfahren zur Herstellung eines Druckausgleichs in einer Gerotorpumpe
KR20210062410A (ko) * 2019-11-21 2021-05-31 엘지이노텍 주식회사 펌프
KR20210062411A (ko) * 2019-11-21 2021-05-31 엘지이노텍 주식회사 펌프
KR20210062788A (ko) * 2019-11-21 2021-06-01 엘지이노텍 주식회사 펌프
KR20210062787A (ko) * 2019-11-21 2021-06-01 엘지이노텍 주식회사 펌프
KR20230007094A (ko) * 2021-07-05 2023-01-12 엘지이노텍 주식회사 펌프
DE102022208141A1 (de) * 2022-08-04 2024-02-15 Vitesco Technologies GmbH Pumpe, insbesondere Getriebeölpumpe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29913367U1 (de) * 1999-07-30 1999-12-09 Pumpenfabrik Ernst Scherzinger Innen-Zahnradpumpe, deren Hohlrad das Innere eines Rotors eines Elektromotors ist
EP1566545A2 (de) * 2004-02-23 2005-08-24 Aisin Seiki Kabushiki Kaisha Elektrische Innenzahnradpumpe
EP1892415A1 (de) * 2005-05-31 2008-02-27 Hitachi, Ltd. Motor-integrierte interne getriebepumpe, herstellungsverfahren für die getriebepumpe und elektronische vorrichtung
JP2009156081A (ja) * 2007-12-25 2009-07-16 Aisin Seiki Co Ltd 電動ポンプ

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JP2819024B2 (ja) * 1988-07-14 1998-10-30 株式会社タツノ・メカトロニクス 超電導ロータリーポンプ
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JP2005318765A (ja) * 2004-04-30 2005-11-10 Mitsui High Tec Inc 回転子鉄心および回転子
EP1971013A4 (de) * 2005-12-21 2017-01-04 Honda Motor Co., Ltd. Elektromotor
JP2008215088A (ja) 2007-02-28 2008-09-18 Jtekt Corp 電動ポンプユニット及び電動オイルポンプ
JP2008245414A (ja) * 2007-03-27 2008-10-09 Matsushita Electric Works Ltd ブラシレスモータ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29913367U1 (de) * 1999-07-30 1999-12-09 Pumpenfabrik Ernst Scherzinger Innen-Zahnradpumpe, deren Hohlrad das Innere eines Rotors eines Elektromotors ist
EP1566545A2 (de) * 2004-02-23 2005-08-24 Aisin Seiki Kabushiki Kaisha Elektrische Innenzahnradpumpe
EP1892415A1 (de) * 2005-05-31 2008-02-27 Hitachi, Ltd. Motor-integrierte interne getriebepumpe, herstellungsverfahren für die getriebepumpe und elektronische vorrichtung
JP2009156081A (ja) * 2007-12-25 2009-07-16 Aisin Seiki Co Ltd 電動ポンプ

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Title
See also references of WO2011030849A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600130203A1 (it) * 2016-12-22 2018-06-22 Bosch Gmbh Robert Pompa elettrica a ingranaggi
WO2018114607A1 (en) * 2016-12-22 2018-06-28 Robert Bosch Gmbh Electric gear pump
CN109139462A (zh) * 2017-06-28 2019-01-04 阿特拉斯·科普柯空气动力股份有限公司 圆柱形对称容积式机器
CN109139462B (zh) * 2017-06-28 2020-03-13 阿特拉斯·科普柯空气动力股份有限公司 圆柱形对称容积式机器

Also Published As

Publication number Publication date
EP2476904A4 (de) 2014-04-30
CN102483059A (zh) 2012-05-30
WO2011030849A1 (ja) 2011-03-17
JP2011058441A (ja) 2011-03-24
US20120164009A1 (en) 2012-06-28

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