EP1055823A1 - Flügelzellen vakuumpumpe für automobile - Google Patents

Flügelzellen vakuumpumpe für automobile Download PDF

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Publication number
EP1055823A1
EP1055823A1 EP98959196A EP98959196A EP1055823A1 EP 1055823 A1 EP1055823 A1 EP 1055823A1 EP 98959196 A EP98959196 A EP 98959196A EP 98959196 A EP98959196 A EP 98959196A EP 1055823 A1 EP1055823 A1 EP 1055823A1
Authority
EP
European Patent Office
Prior art keywords
shaft
vane
rotor
vacuum pump
type vacuum
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.)
Granted
Application number
EP98959196A
Other languages
English (en)
French (fr)
Other versions
EP1055823A4 (de
EP1055823B1 (de
Inventor
Shigeru Onoue
Tsuyoshi Yano
Tomoki Takahashi
Takashi Kinoshita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1055823A1 publication Critical patent/EP1055823A1/de
Publication of EP1055823A4 publication Critical patent/EP1055823A4/de
Application granted granted Critical
Publication of EP1055823B1 publication Critical patent/EP1055823B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0078—Fixing rotors on shafts, e.g. by clamping together hub and shaft

Definitions

  • This invention relates to improvements in a vehicular vane-type vacuum pump.
  • Fig. 9 is a sectional side view showing one example of a conventional vehicular vane-type vacuum pump
  • Fig. 10 is a sectional view showing a spline coupling between a rotor and a shaft of the conventional vehicular vane-type vacuum pump shown in Fig. 9.
  • the conventional vehicular vane-type vacuum pump defines a hermetic space by a cylindrical housing 4 having a suction port 1 and a discharge port 2 and bracket 5 connected together by bolts 3.
  • the bracket 5 rotatably supports a shaft 7 by a bearing 8, and the shaft 7 has provided thereon a rotor 9 eccentrically housed within the housing 4 and rotatable within the housing 4.
  • the rotor 9 is provided with vanes 11 disposed in radial vane slots 10 as shown in Fig. 10 and rotate together with the rotor 9 while sliding at their outer edges along the inner circumferential surface of the housing 4, whereby the fluid is suctioned from the suction port 1 and is discharged under pressure from the discharge pod 2 by the rotation of the rotor 9.
  • the shaft 7 is provided with a coupling 13 so that a rotational force may be inputted from the vehicle side.
  • the shaft 7 is also provided with splines 14 which mesh with splines 15 in the rotor 9 so that a torque may be transmitted therebetween.
  • the shaft 7 and the rotor 9 are fitted together by the splines 14 and 15 to constitute a spline coupling, which is high in machining cost and results in a high product price.
  • the spline coupling portion by the splines 14 and 15 are lubricated by oil, an abnormal wearing may occur depending upon the oil property.
  • the spline coupling is a loose connection, pausing a difficulty in obtaining a required precision.
  • a strong material such as an iron-based sintered product for the rotor 9 and steel material for the shaft 7, must be used in the conventional design, impossible to make the product light weight.
  • the rotor 9 and the housing 4 are conventionally made of materials having different coefficients of thermal expansion, requiring that a large clearance be provided between the rotor and the housing for absorbing the difference in thermal expansion.
  • This invention has been made in order to solve the above discussed problems and has as its object the provision of a vehicular vane-type vacuum pump in which the weight can be reduced, no abnormal wearing between the shafts occurs and the manufacturing cost can be reduced.
  • the present invention resides in a vehicular vane-type vacuum pump comprising a cylindrical housing having a suction port and a discharge port, a rotor eccentrically housed within the housing, a shaft for rotationally driving the rotor and a vane rotatable in a sliding contact with an inner circumferential surface of the housing, whereby a fluid is pumped from the suction port to the discharge port and characterized in that the shaft is provided at its outer circumference with a projection or a groove and the shaft and the rotor are integrally secured together.
  • the shaft may be insert-formed into an integral forged structure during forging of the rotor, and the rotor may be formed by aluminum die-casting, integrally formed by plastic molding or by sintered aluminum powder.
  • the projection or the groove on the outer circumference of the shaft may be integrally formed during cold forging of the shaft or the projection or the groove of the shaft may be integrally formed at the time of manufacturing of the shaft by sintering.
  • the projection of the shaft may be formed by weld-attaching an iron-based metal plate product on an outer circumference of the shaft or the housing and the shaft may be made of the same kind of material.
  • Fig. 1 is a sectional side view showing an embodiment of the vehicular vane-type vacuum pump of the present invention
  • Fig. 2 is a sectional view taken along line A - A of Fig. 1 and showing a coupling between a rotor and a shaft.
  • the vehicular vane-type vacuum pump of the present invention which has an overall structure similar to the vehicular vane-type vacuum pump shown in Figs. 9 and 10, defines a hermetic space by a cylindrical housing 4 having a suction port 1 and a discharge port 2 and bracket 5 connected together by bolts 3.
  • the bracket 5 rotatably supports a shaft 21 by a bearing 8, and the shaft 21 has provided thereon a rotor 24 eccentrically housed within the housing 4 and rotatable within the housing 4.
  • the rotor 24 is provided with vanes 11 disposed in radial vane slots 10 and rotated together with the rotor 24 while sliding at their outer edges along the inner circumferential surface of the housing 4, whereby the fluid is suctioned from the suction port 1 and is discharged under pressure from the discharge port 2 by the rotation of the rotor 24.
  • the shaft 21 is provided with a coupling 13 so that a rotational force may be inputted from the vehicle side.
  • the shaft 21 is provided at a shaft portion of the shaft main body 22 corresponding to the entire axial length of the housing 4 with two fin-shaped projections 23 extending in the axial direction and projecting in the radial direction at radially opposite positions.
  • the rotor 24 has formed therein two axial grooves 25 corresponding to and engaging with two fin-shaped projections 23 so that a torque may be transmitted through these fin-shaped projections 23 and the axial grooves 25.
  • the fin-shaped projections 23 one or more projections may be used and the axial length may be freely set as long as a sufficient torque transmission and ease of manufacture may be ensured.
  • the fin-shaped projections 23 shown in Figs. 1 and 2 may be formed integrally with the shaft main body 22 at the time of cold forging of the shaft 21, may be formed at the time of manufacturing by sintering when the shaft 21 is made of a sintered material, or may be formed by attaching by welding an iron-based metal plate product to the circular rod-shaped shaft main body 22.
  • the metal plate product used may have a flat end portion and a bent portion at the other end bent to extend along the circumferential surface of the shaft main body 22.
  • the rotor 24 is formed and integrally attached with respect to such the shaft 21 by integral casting or integral molding. With such the structure, the clearance in the conventional spline coupling is eliminated to provide no play between the shaft main body 22 of the shaft 21 and the rotor 24.
  • the shaft may also be integrally casted by insert molding during casting of the rotor.
  • the rotor may be integrally formed by aluminum die-casting or plastic molding, or may be formed by sintering after aluminum powder molding.
  • the fin-shaped projections 23 disposed on the shaft main body 22 with a required and sufficient torque transmitting area, allowing a large torque transmission. Therefore, an aluminum alloy or plastic material of a small strength which have not been used as a rotor material can be used as a rotor material, allowing the product to be light-weighted. Also, when the housing 4 and the rotor 24 are made of the same kind of material, no difference of thermal expansion generates therebetween.
  • the manufacturing cost can be reduced, and since there is no play due to the clearance in the spline coupling, the abnormal wear does not occur.
  • Fig. 3 illustrates a second embodiment of another shaft 26 that can be used in the vehicular vane-type vacuum pump of the present invention
  • Fig. 4 illustrates a section taken along line B - B of Fig. 3.
  • This shaft 26 is different from the shaft 21 shown in Figs. 1 and 2 in that it has three fin-shaped projections 23, but in other respects the structure is the same.
  • This shaft 26 may be formed by the cold forging or sintering forming by integrally forming the shaft main body 22 and the fin-shaped projections 23.
  • Fig. 5 is a side view illustrating a third embodiment of a shaft of the vehicular vane-type vacuum pump of the present invention
  • Fig. 6 is a sectional view taken along line C - C of Fig. 5.
  • This shaft 28 comprises a circular rod-shaped shaft main body 29 and two fin-shaped projections 30 radially outwardly extending from the shaft main body 29.
  • the fin-shaped projections 30 is made of two bent metal plates 31, with a semi-circular cylindrical portion 32 of the metal plate 31 attached by welds 27 to the shaft main body 29, and two fin portions 33 extend radially opposite direction of the shaft main body 29 from both ends of the semi-circular cylindrical portion 32 are overlapped to each other.
  • the number of fin-shaped projections 30 is arbitrary.
  • Fig. 7 is a side view illustrating a fourth embodiment of the shaft of the vehicular vane-type vacuum pump of the present invention
  • Fig. 8 is a sectional view taken along line D - D of Fig. 7.
  • This shaft 34 has formed in the surface of the shaft main body 35 axially extending grooves 36 for defining projections 37 therebetween.
  • This shaft 34 may be formed by machining, cold forging or sintering forming.
  • the vehicular vane-type vacuum pump of the present invention comprises a cylindrical housing having a suction port and a discharge port, a rotor eccentrically housed within the housing, a shaft for rotationally driving the rotor and a vane rotatable in sliding contact with an inner circumferential surface of the housing, whereby a fluid is pumped from the suction port to the discharge port, and the shaft is provided at its outer circumference with a projection or a groove and the shaft and the rotor are integrally secured together, so that a vehicular vane-type vacuum pump is provided in which the weight can be reduced, no abnormal wearing in the spline coupling occurs and in which the manufacturing cost is low.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP98959196A 1998-12-14 1998-12-14 Flügelzellen vakuumpumpe für automobile Expired - Lifetime EP1055823B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1998/005642 WO2000036303A1 (fr) 1998-12-14 1998-12-14 Pompe a vide a ailettes pour automobiles

Publications (3)

Publication Number Publication Date
EP1055823A1 true EP1055823A1 (de) 2000-11-29
EP1055823A4 EP1055823A4 (de) 2004-05-12
EP1055823B1 EP1055823B1 (de) 2008-02-20

Family

ID=14209603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959196A Expired - Lifetime EP1055823B1 (de) 1998-12-14 1998-12-14 Flügelzellen vakuumpumpe für automobile

Country Status (5)

Country Link
EP (1) EP1055823B1 (de)
KR (1) KR100385683B1 (de)
DE (1) DE69839159T2 (de)
TW (1) TW414837B (de)
WO (1) WO2000036303A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802984A1 (fr) * 1999-12-23 2001-06-29 Luk Automobiltech Gmbh & Co Kg Pompe a vide
FR2833048A1 (fr) 2001-11-30 2003-06-06 Rene Snyders Machine volumetrique rotative fonctionnant sans frottement dans le volume de travail et supportant des pressions et des temperatures elevees
EP1193396A3 (de) * 2000-10-02 2003-07-30 Mitsubishi Denki Kabushiki Kaisha Flügelzellenvakuumpumpe für Automobile
DE102004034925B3 (de) * 2004-07-09 2006-02-16 Joma-Hydromechanic Gmbh Einflügelvakuumpumpe
DE102004064029B4 (de) * 2004-07-09 2008-04-10 Joma-Hydromechanic Gmbh Einflügelvakuumpumpe
GB2473824A (en) * 2009-09-23 2011-03-30 Edwards Ltd Pump shaft and rotor materials selected for ease of disassembly
CN105317683A (zh) * 2014-06-02 2016-02-10 爱塞威汽车有限责任公司 具有轴向密封部的叶片
CN105626533A (zh) * 2015-12-25 2016-06-01 常州市金坛翰广科技有限公司 新型旋片式真空泵
EP3636944A1 (de) * 2018-10-09 2020-04-15 Continental Automotive GmbH Rotor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3550148A1 (de) * 2018-04-06 2019-10-09 Entecnia Consulting, S.L.U. Rotationspumpe
KR102522994B1 (ko) 2021-10-28 2023-04-19 엘지전자 주식회사 로터리 압축기

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135229A (en) * 1979-04-11 1980-10-21 Yunikura:Kk Fixing method of rotor to drive shaft
JPH08326673A (ja) * 1995-06-05 1996-12-10 Aisan Ind Co Ltd ベーンポンプ
JPH0951958A (ja) * 1995-08-14 1997-02-25 Nippon Kikai Kogyo Kk 消防ポンプ呼水用の真空ポンプ

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO0036303A1 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802984A1 (fr) * 1999-12-23 2001-06-29 Luk Automobiltech Gmbh & Co Kg Pompe a vide
WO2001048381A3 (de) * 1999-12-23 2002-03-21 Luk Automobiltech Gmbh & Co Kg Vakuumpumpe
GB2375374A (en) * 1999-12-23 2002-11-13 Luk Automobiltech Gmbh & Co Kg Vacuum pump
EP1193396A3 (de) * 2000-10-02 2003-07-30 Mitsubishi Denki Kabushiki Kaisha Flügelzellenvakuumpumpe für Automobile
FR2833048A1 (fr) 2001-11-30 2003-06-06 Rene Snyders Machine volumetrique rotative fonctionnant sans frottement dans le volume de travail et supportant des pressions et des temperatures elevees
DE102004064029B4 (de) * 2004-07-09 2008-04-10 Joma-Hydromechanic Gmbh Einflügelvakuumpumpe
DE102004034925B3 (de) * 2004-07-09 2006-02-16 Joma-Hydromechanic Gmbh Einflügelvakuumpumpe
GB2473824A (en) * 2009-09-23 2011-03-30 Edwards Ltd Pump shaft and rotor materials selected for ease of disassembly
GB2473824B (en) * 2009-09-23 2015-12-23 Edwards Ltd Preventing pump parts joining by corrosion
US9695824B2 (en) 2009-09-23 2017-07-04 Emmanuel Uzoma Okoroafor Pump with corrosion resistant shaft and rotor surfaces
CN105317683A (zh) * 2014-06-02 2016-02-10 爱塞威汽车有限责任公司 具有轴向密封部的叶片
CN105626533A (zh) * 2015-12-25 2016-06-01 常州市金坛翰广科技有限公司 新型旋片式真空泵
EP3636944A1 (de) * 2018-10-09 2020-04-15 Continental Automotive GmbH Rotor

Also Published As

Publication number Publication date
EP1055823A4 (de) 2004-05-12
EP1055823B1 (de) 2008-02-20
DE69839159D1 (de) 2008-04-03
WO2000036303A1 (fr) 2000-06-22
TW414837B (en) 2000-12-11
KR100385683B1 (ko) 2003-05-27
DE69839159T2 (de) 2009-02-26
KR20010040678A (ko) 2001-05-15

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