CN104302918A - Multistage oil pump - Google Patents

Multistage oil pump Download PDF

Info

Publication number
CN104302918A
CN104302918A CN201380025650.5A CN201380025650A CN104302918A CN 104302918 A CN104302918 A CN 104302918A CN 201380025650 A CN201380025650 A CN 201380025650A CN 104302918 A CN104302918 A CN 104302918A
Authority
CN
China
Prior art keywords
rotor
oil pump
isolating plate
rotor case
case
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.)
Pending
Application number
CN201380025650.5A
Other languages
Chinese (zh)
Inventor
小田宏行
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.)
MIKUMI CORP
Mikuni Corp
Original Assignee
MIKUMI 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
Priority to JP2012-113479 priority Critical
Priority to JP2012113479A priority patent/JP6027768B2/en
Application filed by MIKUMI CORP filed Critical MIKUMI CORP
Priority to PCT/JP2013/063649 priority patent/WO2013172409A1/en
Publication of CN104302918A publication Critical patent/CN104302918A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F04C11/003Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle having complementary function
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10Outer members for co-operation with rotary pistons; Casings
    • F01C21/104Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0065Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/102Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/103Rotary-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 one member having simultaneously a rotational movement about its own axis and an orbital movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/30Casings or housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00Metals
    • F05C2201/02Light metals
    • F05C2201/021Aluminium

Abstract

A conventional multistage oil pump is formed entirely of iron-based materials, so there is a problem in that the weight of the pump is large. In this multistage oil pump (1), rotors (6, 7) are connected in series. A rotor case (4) is formed by connecting a first rotor case and a second rotor case (42) in the axial direction, with the interior thereof being partitioned by means of a spacer (5). The first rotor case (41) and the second rotor case (42) are joined to the spacer (5) with dowel pins (8). The rotors (6, 7) are formed of an iron-based material, and the spacer (5) is formed with an aluminum-based material.

Description

Control system of multistage oil pump
Technical field
The present invention relates to a kind of control system of multistage oil pump especially for automobile etc.
Background technique
In the past, the control system of multistage oil pump (such as patent documentation 1) providing multiple rotor inline to connect.As Fig. 1 records, trochoid pump (trochoid pump) (rotor) 4,5 is directly accommodated in the frame main body 1 of bottom tube-like.
Patent documentation 1: Japanese Patent Laid-Open 2006-161614 publication
Summary of the invention
The problem that invention will solve
But above-mentioned structure, owing to being all ferrous material, therefore has the problem that weight is large.
The object of the present invention is to provide a kind of control system of multistage oil pump that can solve described problem.
The method of dealing with problems
In order to solve the problem, control system of multistage oil pump of the present invention is the control system of multistage oil pump that a kind of multiple rotor inline connects, and it is characterized in that: described multiple rotor connects at axle direction, and is housed in the inner rotor case separated by isolating plate; This rotor case is divided in the axial direction; The material of described isolating plate is the material less than rotor proportion.
And the present invention is characterized by: described rotor is ferrous material, described isolating plate is aluminium based material.
And the present invention is characterized by: described rotor case accompanies isolating plate between rotor case unit, this isolating plate and each described rotor case unit are engaged by locating stud and form.
Invention effect
According to the present invention, because described isolating plate is the material less than rotor proportion, therefore lightweight can be realized.
Accompanying drawing explanation
Fig. 1 is the perspective view of the control system of multistage oil pump of one embodiment of the present invention.
Fig. 2 is the front elevation of the control system of multistage oil pump of Fig. 1.
Fig. 3 is the perspective exploded view of the control system of multistage oil pump of Fig. 1 viewed from cover cap side.
Fig. 4 is the perspective exploded view of the control system of multistage oil pump of Fig. 1 viewed from frame side.
Fig. 5 is the perspective exploded view of the control system of multistage oil pump of Fig. 1 viewed from cover cap side.
Fig. 6 is the perspective exploded view of the control system of multistage oil pump of Fig. 1 viewed from frame side.
Fig. 7 is the A-A arrowhead sectional drawing of Fig. 2.
Fig. 8 is the figure of the flowing of the oil represented in control system of multistage oil pump.
Embodiment
Referring to accompanying drawing, preferred forms of the present invention is described.
Control system of multistage oil pump 1 as shown in figs. 1 to 6, possesses: frame 2, the cover cap 3 covering frame 2, the rotor case 4 be accommodated in frame 2, be housed in rotor case 4 and be interconnected to the 1st, the 2nd rotor 6,7 of row.
Frame 2 in there being bottom tube-like, and possesses pump discharge 21 and embedding hole 22.Cover cap 3 is formed with embedding hole 31.Rotor case 4 is divided into the 1st rotor case 41 and the 2nd rotor case 42 in the axial direction, and the 1st rotor case 41 and the 2nd rotor case 42 are isolated plate 5 isolates.
In 1st rotor case 41 and the 2nd rotor case 42, contain the 1st rotor 6 and the 2nd rotor 7 respectively.The 1st rotor accepting hole 411 making the circle of axis deviation relative to the 1st rotor case 41 is formed in 1st rotor case 41, and embedding hole 412.The 2nd rotor accepting hole 421 making the circle of axis deviation relative to the 2nd rotor case 42 is formed in 2nd rotor case 42, and embedding hole 422.1st rotor case 41 and the 2nd rotor case 42 make axle center offset by the 1st rotor accepting hole 411 and the 2nd rotor accepting hole 421, and are configured in frame 2.
Isolating plate 5 with the plectane of the 1st rotor case 41 and the 2nd rotor case 42 same outer diameter on be provided with the inserting hole 51 of live axle 11, the 1st rotor discharge opening 52, the 2nd rotor suction port 53, the 1st rotor suction port 54 and forming.1st rotor discharge opening 52 and the 2nd rotor suction port 53 are respectively formed at the one side of isolating plate 5 and the another side of isolating plate 5, and are interconnected.Locating stud 8 is extruded with respectively from the one side of isolating plate 5 and another side.Locating stud 8 is made up of SUJ (high carbon bearing steel).
Isolating plate 5 by than the 1st, aluminium based material that the 2nd rotor 6,7 proportion is little makes.And as aluminium based material, specifically can use ADC12, ADC10, ADC14 (die casting is used), AC2A, AC4B (sand-cast is used), A2014, A2017 etc.
Between the 1st rotor case 41 and cover cap 3, from the 1st rotor case 41 side, be configured with side plate 9 and sealing material 12 successively.The formation of side plate 9 be with the plectane of the 1st rotor case 41 same outer diameter on the inserting hole 91 of live axle 11, cleanout 92 and embedding hole 94 are set.Sealing material 12 is used for sealing between cover cap 3 and side plate 9.
The locating stud 8 given prominence to from the one side of isolating plate 5 is embedded in the embedding hole 422 of the 2nd rotor case 42 and the embedding hole 22 of frame 2, and as shown in Figure 7, the 2nd rotor case 42 and frame 2 is engaged in isolating plate 5.The locating stud 8 given prominence to from the another side of isolating plate 5 is embedded in the embedding hole 31 of the embedding hole 412 of the 1st rotor case 41, the embedding hole 94 of side plate 9 and cover cap 3, and the 1st rotor case 41, side plate 9 and cover cap 3 are engaged in isolating plate 5.
1st rotor 6 for the 1st internal rotor 62 being configured at the inner side of the 1st external rotor 61 and forming, and is made up of the material of iron system.As the material of iron system, iron/copper-carbon system (JPMA specification), SMF4030 etc. specifically can be used.1st external rotor 61 for arranging oily pack hole 611 and form on the plectane with the external diameter roughly the same with the internal diameter of the 1st rotor accepting hole 411, and is rotatably configured in the 1st rotor accepting hole 411.Oil pack hole 611 is configured to make axle center consistent with the 1st external rotor 61.
Be configured with between 1st external rotor 61 and the 1st internal rotor 62: 4 oily containing rooms of being isolated by the outer circumferential face of the inner peripheral surface of oily pack hole 611, the 1st internal rotor 62, isolating plate 5 and side plate 9.
1st internal rotor 62 is fixed on live axle 11, makes the axle center of live axle 11 consistent with the axle center of the 1st rotor case 41, and is configured in the 1st external rotor 61.
2nd rotor 7 is for being configured at the inner side of the 2nd external rotor 71 by the 2nd internal rotor 72 and forming.2nd external rotor 71 has the shape identical with the 1st external rotor 61, and is rotatably configured in the 2nd rotor accepting hole 421.2nd internal rotor 72 has the shape identical with the 1st internal rotor 62, and makes the axle center of live axle 11 consistent with the axle center of the 2nd rotor case 42, and is configured in the 2nd external rotor 71.
Be configured with between 2nd external rotor 71 and the 2nd internal rotor 72: 4 oily containing rooms of being isolated by the inner peripheral surface of oily pack hole 611, the outer circumferential face of the 2nd internal rotor 72, frame 2.
Then, the assembling method of control system of multistage oil pump 1 is described.
First, live axle 11 be inserted through isolating plate 5 and use finger setting, and internal rotor being assembled on live axle 11, external rotor 61,71 is fitted on internal rotor 62,72.Then, isolating plate 5 is installed locating stud 8, and at the one side of isolating plate 5 and another side assemble rotor shell 41,42, on the 2nd rotor case 42, assemble side plate 9 further.After completing interim assembling as mentioned above, in collecting to frame 2, cover cap 3 is installed in frame 2.
Then, the operation of control system of multistage oil pump 1 is described.
The oily containing room of the 1st rotor 6 as shown in Figure 8, is provide oil by the 1st rotor suction port 54.When live axle 11 rotates, the 1st external rotor 61 is rotated in the sense of rotation of live axle 11 by the 1st internal rotor 62, and oily containing room also moves around live axle 11.Oil containing room along with away from live axle 11 enlarging volume, and sucks its corresponding oil mass from the 1st rotor suction port 54.And oily containing room reduces volume along with close to live axle 11, and to spue its corresponding oil mass from cleanout 92 and the 1st rotor discharge opening 52.
The oily containing room of the 2nd external rotor 71 provides oil by the 2nd rotor suction port 53.When live axle 11 rotates, the 2nd external rotor 71 is rotated in the sense of rotation of live axle 11 by the 2nd internal rotor 72, and oily containing room also moves around live axle 11.Oil containing room along with away from live axle 11 enlarging volume, and sucks its corresponding oil mass from the 2nd rotor suction port 53.And oily containing room reduces volume along with close to live axle 11, and to spue its corresponding oil mass from discharge opening 21.
The oil that the oily containing room of the 1st rotor 6 is spued by the 1st rotor discharge opening 52, is inhaled into the oily containing room of the 2nd rotor 7 by the 2nd rotor suction port 53.Because the 1st rotor accepting hole 411 offsets relative to the 2nd rotor accepting hole 421, so the volume of oily containing room along with increase the 1st rotor 6, reduce the volume of the oily containing room of the 2nd rotor 7.Therefore, from the oil that the 1st rotor discharge opening 52 spues, by the oily containing room of the 2nd rotor 7 of enlarging volume, intactly sucked by the 2nd suction port 53.
According to the present embodiment, because isolating plate 5 is the material less than rotor 6,7 proportion, therefore lightweight can be realized.
And according to the present embodiment, because rotor 6,7 is ferrous material, and isolating plate 5 is aluminium based material, therefore can suppress to produce between rotor 6,7 and isolating plate 5 to sinter.
Although in the above-described embodiment, be illustrated the situation that isolating plate 5 is made up of ferrous material, isolating plate 5 also can be made up of magnesium based material.And, the method utilizing locating stud 8 to engage between isolating plate 5 with rotor case 41,42 can choose at random, such as, following structure can be formed: be set to by the external diameter of isolating plate 5 be less than rotor case 41,42, the section being provided with the peripheral part that can be embedded in isolating plate 5 in the inner peripheral portion of rotor case 41,42 is poor, from the outside of rotor case 41,42 at the pin of both embedding part fixed locating studs 8 etc., thus limit between rotor case 41,42 and isolating plate 5 and rotate.
And, although in the above-described embodiment, provide oil condition to be illustrated isolating plate 5 side of the side from rotor case 4 to the oily containing room in the 1st external rotor 61, also can form the structure from the supply of cover cap 3 side.Further, the structure being supplied to oily containing room from cover cap 3 by frame 2 can also be formed.
Description of reference numerals
1 control system of multistage oil pump
11 live axles
12 sealing materials
2 frames
21 pump discharge openings
22 embedding holes
3 cover caps
31 embedding holes
4 rotor cases
41 the 1st rotor cases
411 the 1st rotor accepting holes
412 embedding holes
42 the 2nd rotor cases
421 the 2nd rotor accepting holes
422 embedding holes
5 isolating plates
51 inserting holes
52 the 1st rotor discharge openings
53 the 2nd rotor suction ports
54 the 1st rotor suction ports
6 the 1st rotors
61 the 1st external rotors
611 oily filling holes
62 the 1st internal rotors
7 the 2nd rotors
71 the 2nd external rotors
Mouth filled by 711 oil
72 the 2nd internal rotors
8 locating studs (Dowel Pin)
9 side plates
91 inserting holes
92 cleanouts
94 embedding holes.

Claims (3)

1. a control system of multistage oil pump, it is formed by connecting by multiple rotor inline, it is characterized in that:
Described multiple rotor in axial connection, and is housed in the inner rotor case separated by isolating plate;
This rotor case is divided in the axial direction;
The material of described isolating plate is the material less than rotor proportion.
2. control system of multistage oil pump as claimed in claim 1, is characterized in that:
Described rotor is iron system, and described isolating plate is aluminium system.
3. control system of multistage oil pump as claimed in claim 1 or 2, is characterized in that:
Described rotor case accompanies isolating plate between rotor case unit, and this isolating plate is engaged by locating stud with each described rotor case unit and forms.
CN201380025650.5A 2012-05-17 2013-05-16 Multistage oil pump Pending CN104302918A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2012-113479 2012-05-17
JP2012113479A JP6027768B2 (en) 2012-05-17 2012-05-17 Multistage oil pump
PCT/JP2013/063649 WO2013172409A1 (en) 2012-05-17 2013-05-16 Multistage oil pump

Publications (1)

Publication Number Publication Date
CN104302918A true CN104302918A (en) 2015-01-21

Family

ID=49583812

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201380025650.5A Pending CN104302918A (en) 2012-05-17 2013-05-16 Multistage oil pump

Country Status (5)

Country Link
US (1) US20150118087A1 (en)
EP (1) EP2868927A4 (en)
JP (1) JP6027768B2 (en)
CN (1) CN104302918A (en)
WO (1) WO2013172409A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB596064A (en) * 1945-07-17 1947-12-24 Stothert & Pitt Ltd Improvements in or relating to rotary pumps
US3694113A (en) * 1971-01-12 1972-09-26 Curtiss Wright Corp Multi-unit rotary mechanism
JPS6252219A (en) * 1985-08-31 1987-03-06 Shimadzu Corp Operating shaft
JPH06323261A (en) * 1993-05-18 1994-11-22 Honda Motor Co Ltd Oil pump
JPH07167066A (en) * 1993-12-10 1995-07-04 Jidosha Kiki Co Ltd Double cartridge type oil pump
JPH1122656A (en) * 1997-07-04 1999-01-26 Matsushita Electric Ind Co Ltd Solution pump for absorption heat pump and manufacture thereof
JP2006170149A (en) * 2004-12-17 2006-06-29 Hitachi Ltd Tandem type oil pump
CN101446286A (en) * 2008-10-13 2009-06-03 王晓忻 Modular internal gear pump or modular motor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123526A (en) * 1998-09-18 2000-09-26 Industrial Technology Research Institute Multistage pump and method for assembling the pump
US7037085B1 (en) * 2003-03-03 2006-05-02 Stark Patricia A Dual gear single outlet material pump and method of constructing such a pump
JP2006161614A (en) 2004-12-03 2006-06-22 Hitachi Ltd Tandem type trochoid pump
KR100909196B1 (en) * 2005-01-12 2009-07-23 미쓰비시 마테리알 피엠지 가부시키가이샤 Inner rotor of internal gear pump

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB596064A (en) * 1945-07-17 1947-12-24 Stothert & Pitt Ltd Improvements in or relating to rotary pumps
US3694113A (en) * 1971-01-12 1972-09-26 Curtiss Wright Corp Multi-unit rotary mechanism
JPS6252219A (en) * 1985-08-31 1987-03-06 Shimadzu Corp Operating shaft
JPH06323261A (en) * 1993-05-18 1994-11-22 Honda Motor Co Ltd Oil pump
JPH07167066A (en) * 1993-12-10 1995-07-04 Jidosha Kiki Co Ltd Double cartridge type oil pump
JPH1122656A (en) * 1997-07-04 1999-01-26 Matsushita Electric Ind Co Ltd Solution pump for absorption heat pump and manufacture thereof
JP2006170149A (en) * 2004-12-17 2006-06-29 Hitachi Ltd Tandem type oil pump
CN101446286A (en) * 2008-10-13 2009-06-03 王晓忻 Modular internal gear pump or modular motor

Also Published As

Publication number Publication date
EP2868927A1 (en) 2015-05-06
US20150118087A1 (en) 2015-04-30
EP2868927A4 (en) 2016-03-09
JP2013238209A (en) 2013-11-28
WO2013172409A1 (en) 2013-11-21
JP6027768B2 (en) 2016-11-16

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Application publication date: 20150121