CN101678749B - 混合动力驱动装置 - Google Patents

混合动力驱动装置 Download PDF

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Publication number
CN101678749B
CN101678749B CN2008800157316A CN200880015731A CN101678749B CN 101678749 B CN101678749 B CN 101678749B CN 2008800157316 A CN2008800157316 A CN 2008800157316A CN 200880015731 A CN200880015731 A CN 200880015731A CN 101678749 B CN101678749 B CN 101678749B
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hybrid drive
hole
motor
engagement element
partition wall
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CN101678749A (zh
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铃木晴久
足立昌俊
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Toyota Motor Corp
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Toyota Motor Corp
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    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
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    • B60K6/36Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
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    • B60K6/44Series-parallel type
    • B60K6/445Differential gearing distribution type
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    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54Transmission for changing ratio
    • B60K6/547Transmission for changing ratio the transmission being a stepped gearing
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    • B60L15/00Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
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    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

Abstract

一种混合动力驱动装置,其特征在于,外壳空间(G1,G2)由分隔壁(24)分隔成第一外壳部(22)和第二外壳部(23);驱动电动马达(8)设置在第一外壳部(22)中;摩擦接合元件(B1)设置在第二外壳部(23)中;以及形成有与外壳空间(G1,G2)连通的通孔(59)。

Description

混合动力驱动装置
技术领域
本发明涉及一种混合动力驱动装置,并且尤其涉及一种安装在混合动力车辆上以提高定子绕组线的冷却性能的混合动力驱动装置。
背景技术
通常,在安装于混合动力车辆上的常规混合动力驱动装置中,在混合动力驱动装置的外壳内设置有多个摩擦接合元件,例如通过供应到液压伺服机构的接合压力致动的离合器和制动器,并且来自内燃发动机和来自电动马达的驱动力的传输路径根据离合器和制动器的差动运动经行星齿轮单元改变,以将驱动力在改变其旋转速度和扭矩的同时传输到位于下游的驱动轮。
一般而言,混合动力车辆的电动马达包括定子和转子,所述定子具有卷绕在固定到外壳的铁心外周的电线,所述转子设置在定子的内周部以自由旋转。由于大电流流经电线,定子的温度增加并且马达的扭矩减少,所以需要冷却定子和转子。
例如,日本专利申请公报No.8-318741(JP-A-08-318741)公开了一种混合动力车辆,其中转子形成有油缸,并且在油缸中设置有供油和排油的液压致动器。从油泵排出以冷却转子的油被液压致动器引导到油缸内,并且油然后被液压致动器供应到转子以冷却转子和定子。
在上述的多个摩擦接合元件中,设置在行星齿轮单元中的制动器包括附连到外壳内周部的多个隔板,以及设于齿圈外周部并且插在隔板之间的多个摩擦片。在此制动器中,当隔板被液压油缸挤压时,隔板和摩擦片彼此接合。此接合使得齿圈相对于外壳静止,这改变了驱动力的传输路径。
为了防止摩擦片和隔板咬死,日本专利申请公报No.2007-1444(JP-A-2007-1444)公开了一种驱动装置,其中对摩擦片和隔板供油以进行冷却。
在JP-A-2007-1444中描述的对制动器供油以进行冷却的驱动装置中,油从油泵供应到沿轴向形成在行星齿轮单元的旋转轴中的供应孔。然后油经形成在旋转轴中并且径向穿过供应孔的径向孔供应到形成在行星齿轮单元的恒星齿轮和小齿轮中的径向孔,并且然后利用行星齿轮单元的旋转引起的离心力供应到位于齿圈外周部上的摩擦片和隔板。
然而,在该混合动力驱动装置中,电动马达和包括摩擦接合元件的行星齿轮利用插在其间的分隔壁彼此分离地收容在混合动力驱动装置的外壳中,以支撑用于转子的轴承并在制动器中形成油缸腔室。因此,需要两个系统的供油通路从油泵向电动马达和摩擦接合元件两者供油,这使得必须使用容量加大的油泵。
特别是,由于变热的绕组线位于转子沿径向的外侧,所以必须利用高压油泵从设置在转子中的液压致动器向绕组线供油。因此,通过内燃发动机驱动高容量油泵的需要可能降低车辆的燃料效率。
发明内容
本发明提供了一种混合动力驱动装置,其更有效地冷却电动马达而无需增加油泵的容量,因此避免了车辆的燃料经济性恶化。
本发明的一个方面提供了一种混合动力驱动装置,包括:外壳主体,所述外壳主体具有i)至少一个分隔壁,ii)第一外壳部,以及iii)第二外壳部,在所述外壳主体中分别形成有由所述分隔壁分隔的第一空间和第二空间;电动马达,所述电动马达包括i)固定到所述第一外壳部并具有绕组线的定子,ii)以可转动方式设置在所述定子中的转子轴,以及iii)固定到所述转子轴的转子;旋转轴,所述旋转轴与所述转子轴同轴并且能够与所述转子轴一起旋转;摩擦接合元件,所述摩擦接合元件包括i)花键联接到所述第二外壳部的内周部的第一摩擦部件,ii)由所述旋转轴支撑的毂,以及iii)花键联接到所述毂并且与所述第一摩擦部件摩擦接合或非摩擦接合的第二摩擦部件;以及润滑剂供应装置,所述润滑剂供应装置用于将润滑剂供应到所述摩擦接合元件,所述摩擦接合元件设置在所述分隔壁附近,所述混合动力驱动装置的特征在于,在所述分隔壁中形成有连通所述第一空间和所述第二空间的通孔,并且所述通孔面对所述摩擦接合元件。
在依照上述方面的混合动力驱动装置中,所述通孔可以形成在所述外壳主体的内周部处的所述分隔壁中。
根据此构造,连通第一空间和第二空间的通孔形成在分隔壁中,并且通孔形成在第二外壳部的定位在摩擦接合元件附近的内周部。因此,当润滑剂供应到摩擦接合元件时,润滑剂从第二外壳部经通孔供应到第一外壳部。
在依照上述方面的混合动力驱动装置中,所述定子可以固定到所述第一外壳部的内周部。
在依照上述方面的混合动力驱动装置中,在所述润滑剂被供应到所述摩擦接合元件后,所述润滑剂可以被顺次供应到所述第二空间、所述通孔和所述第一空间以冷却所述绕组线。
在依照上述方面的混合动力驱动装置中,所述润滑剂供应装置可以供应一部分润滑剂到所述摩擦接合元件,并且供应其它润滑剂以冷却所述转子。
根据此构造,由于定子固定到内周部,所以变热的绕组线可被经通孔供应的润滑剂冷却。
因此,供应到摩擦接合元件的润滑剂可供应到定位在转子的径向外侧的绕组线。因此,可简化供应润滑剂以冷却电动马达的系统使得仅转子被冷却。从而,可防止为有效地冷却电动马达而增加油泵容量,并防止车辆的燃料经济性恶化。
在依照上述方面的混合动力驱动装置中,所述摩擦接合元件可以通过用作为变速器的一部分来控制输入到所述毂的动力,所述变速器将输入到所述转子轴的动力在变速后传输到所述旋转轴。
根据此构造,供应到变速器中设置的制动机构的润滑剂可供应到定位在转子的径向外侧的绕组线。因此,可简化供应润滑剂以冷却电动马达的系统使得仅转子被冷却。从而,不必增加油泵的容量来有效地冷却邻近变速器的电动马达,从而避免车辆的燃料经济性恶化。
在依照上述方面的混合动力驱动装置中,所述摩擦接合元件可以通过用作为动力分配装置的一部分来控制输入到所述毂的动力,所述动力分配装置将输入到所述旋转轴的动力分配到所述转子轴和输出轴。
根据此构造,供应到动力分配装置的制动机构的润滑剂可供应到定位在转子的径向外侧的绕组线。因此,可简化供应润滑剂以冷却电动马达的系统使得仅转子被冷却。从而,不必增加油泵的容量以有效地冷却邻近动力分配装置的电动马达,从而避免车辆的燃料经济性恶化。
在依照上述方面的混合动力驱动装置中,所述摩擦接合元件可为制动机构。
在依照上述方面的混合动力驱动装置中,在所述第二外壳部的内周部中可形成有花键槽;在所述第一摩擦部件的外周部上可形成有花键,所述花键可与所述花键槽配合;以及所述通孔可以形成在所述分隔壁中以便与所述花键槽连通。
根据此构造,通孔形成在分隔壁中以便与形成在第二外壳部的内周部中的花键槽连通。因此,可保证充足的空间以形成通孔。
在依照上述方面的混合动力驱动装置中,沿所述第一外壳部的圆周方向可设置有多个所述通孔。
在依照上述方面的混合动力驱动装置中,可设置有与花键槽数目相同的通孔。
依照上述方面的混合动力驱动装置还可包括:具有第一端和第二端的管部件,其中,所述第一端附连到所述通孔的位于所述第一外壳部侧的开口端,并且所述第二端从所述第一端朝向所述绕组线延伸。
根据此构造,润滑剂从设置在通孔的开口端处的管部件供应到绕组线。因此,在管部件的第二端朝绕组线的期望位置定向的情况下,绕组线的期望位置可以容易地更有效地冷却。
附图说明
从以下参照附图对优选实施方式的描述,本发明的前述和/或进一步的目的、特征和优点将变得更加显而易见,附图中相似的标号用来代表相似的元件并且其中:
图1是示出依照本发明第一实施方式的混合动力驱动装置的构造的示意图;
图2是示出依照本发明第一实施方式的混合动力驱动装置的驱动电动马达和自动换挡装置的一部分的剖面图;
图3是沿图2的线X-X截取的剖面图;
图4示出了依照本发明第一实施方式的混合动力驱动装置中润滑剂的流动;以及
图5是依照本发明第二实施方式的混合动力驱动装置的动力分配机构和控制电动马达的剖面图。
具体实施方式
下文将参照附图描述本发明的实施方式。
图1是示出依照本发明第一实施方式的混合动力驱动装置的构造的示意图。图2是示出依照本发明第一实施方式的混合动力驱动装置的驱动电动马达和自动换挡装置的一部分的剖面图。图3是沿图2的线X-X截取的剖面图。图4示出了依照本发明第一实施方式的混合动力驱动装置中润滑剂的流动。在此实施方式中,依照本发明的混合动力驱动装置应用于前置发动机、后驱动(FR)的车辆。
如图1所示,车辆1设置有混合动力驱动装置2。左、右前轮3和左、右后轮4悬挂于车辆1的车体(未示出)。内燃发动机5借助橡胶支座安装在车体的前部,使得曲轴沿前后方向延伸。
混合动力驱动装置2包括控制电动马达6、动力分配行星齿轮7和驱动电动马达8,这些部件从内燃发动机5侧按所述次序布置在曲轴上。变速器9布置在驱动电动马达8后面。
混合动力驱动装置2收容在外壳10中,该外壳10由组装在一起的可分开的外壳部组成。外壳10固定到内燃发动机5。外壳10具有收容控制电动马达6的控制电动马达收容部、收容驱动电动马达8的驱动电动马达收容部、以及分别收容动力分配行星齿轮7和变速器9的收容部。驱动马达收容部和收容变速器9的收容部将在稍后描述。
控制电动马达收容部、驱动电动马达收容部、收容动力分配行星齿轮7的收容部和收容变速器9的收容部由分隔壁分隔。转子轴13、14分别附连到控制电动马达6的转子11和驱动电动马达8的转子12,并且经由分隔壁支撑以自由旋转。
控制电动马达6的定子15和驱动电动马达8的定子16分别固定到外壳10的内周部。定子15、16分别由产生磁场的铁心15a、16a和绕组线15b、16b组成。
亦即,控制电动马达6和驱动电动马达8分别是包括定子15、16的无刷直流(DC)马达。转子11、12分别设置在定子15、16的内周部具有预定的气隙并且支撑为与转子轴13、14一起自由旋转。
混合动力驱动装置2的输入轴17经由减振器装置18联接到内燃发动机5的输出轴5a,该输出轴5a为曲轴的向后突出的部分。控制电动马达6与位于曲轴上的输入轴17同轴地布置。
动力分配行星齿轮7为与输入轴17同轴布置的简单行星齿轮,并且包括联接到输入轴17并且支撑多个小齿轮(行星小齿轮)P1的齿轮架(第一旋转元件)CR1、联接到转子11的恒星齿轮(第二旋转元件)S1、以及输出驱动力的齿圈(第三旋转元件)R1。齿圈R1联接到与输入轴17同轴布置并且向后延伸的输出轴19上。
驱动电动马达8的转子12固定到配合在输出轴19上的套轴20并且相对于输出轴19自由旋转。套轴20用作变速器9的输入轴。变速器9的输出联接到输出轴19,并且驱动电动马达8经由变速器9联接到输出轴19。
如图2所示,变速器9为所谓的拉维娜式行星齿轮单元PU,其由具有共用齿轮架CR2的单个双行星齿轮(S2,R2,SR2)和行星齿轮组成,共用齿轮架CR2包括与双行星齿轮和第二恒星齿轮S3共用的长小齿轮P2。长小齿轮P2具有台阶式结构,具有不同的齿数。
亦即,双行星齿轮由第一恒星齿轮S2、齿圈R2和支撑短小齿轮P3和长小齿轮P2的共用齿轮架CR2组成。短小齿轮P3与第一恒星齿轮S2和齿圈R2啮合,并且长小齿轮P2的小直径齿轮P2b与短小齿轮P3啮合。长小齿轮P2的大直径齿轮P2a与第二恒星齿轮S3啮合。
恒星齿轮S2与套轴20一体形成,套轴20花键联接到驱动电动马达8的转子12的转子轴14。第二恒星齿轮S3经由轴衬等由套轴20支撑以自由旋转。
共用齿轮架CR2通过其后板一体固定到输出轴19。输出轴19的前端中形成有空腔19a。从动力分配行星齿轮7的齿圈R1(参看图1)延伸的联接输出轴19b花键配合在空腔19a中。
驱动电动马达8收容在用作外壳主体的马达外壳22中的外壳空间G1中。变速器9收容在由马达外壳22的后部22a和延伸壳体23组成的外壳空间G2中。
亦即,混合动力驱动装置2的外壳10(参看图1)包括马达外壳22,其中形成有空间G1以收容驱动电动马达8,并且马达外壳22的后部22a和延伸壳体23两者中形成有空间G2以收容变速器9。外壳空间G1、G2由设置在马达外壳22中的分隔壁24隔开。在此实施方式中,马达外壳22用作“第一外壳部”,并且马达外壳22的后部22a和延伸壳体23用作“第二外壳部”。
转子12的转子轴14的后端经由滚珠轴承25由马达外壳22的分隔壁24支撑以允许自由旋转。滚珠轴承25经由联接输出轴19b支撑转子轴14、套轴20和轴衬。分隔壁(未示出)设置在转子轴14的前端。转子轴14的前端经由滚珠轴承由分隔壁支撑以自由旋转。
输出轴19经由彼此隔开预定距离的两个滚珠轴承26、27由延伸壳体23的凸块23a支撑以自由旋转。
制动机构B1设置在毂28的外周面与形成在马达外壳22后部的内周部中的花键槽29之间。毂28从第二恒星齿轮S3的前端径向向外延伸并且经过共用齿轮架CR2的前端。
如图3所示,花键槽29沿圆周方向以规则间隔形成在马达外壳22的内周部中。花键30a形成在环形隔板30的外周部上,并且配合在花键槽29中。
花键槽29沿联接输出轴19b的轴向延伸。隔板30沿联接输出轴19b的轴向经由摩擦片31叠置。
摩擦片31沿联接输出轴19b的轴向以预定间隔设置在毂28的外周部上,并且插入隔板30之间。因此,隔板30和摩擦片31彼此可摩擦接合或非摩擦接合。在此实施方式中,第一制动机构(其可视为本发明的“摩擦接合元件”)B1由用作“第一摩擦部件”的隔板30和用作“第二摩擦部件”的摩擦片31组成。
卡环32设置在最右边的隔板30的右侧。卡环32沿轴向定位最右边的隔板30。在图3中,未示出诸如长小齿轮P2之类的构件。
在图1和图2中,第二制动机构B2插入齿圈R2的外周面与形成在延伸壳体23的内周部中的花键槽29之间。第二制动机构B2包括环形隔板35和摩擦片36。配合在花键槽29中的花键形成在隔板35的外周部上。摩擦片36附连到齿圈R2的外周部,并且插入隔板35之间。
因此,行星齿轮单元PU布置在第一制动机构B1和第二制动机构B2的径向内侧,使得第一制动机构B1以与第二恒星齿轮S3和大直径齿轮P2a重叠的方式布置在第二恒星齿轮S3和长小齿轮P2的大直径齿轮P2a的径向外侧。
驱动第一制动机构B1的第一液压致动器39布置在分隔壁24的面对第一制动机构B1的侧表面。第一液压致动器39包括形成在分隔壁24的侧表面中的环形凹槽39b,以及以流体密封方式配合在凹槽39中的活塞39a。
复位弹簧40以压缩状态设置在固定到分隔壁24的定位器39c与活塞39a之间。复位弹簧40推动活塞39a离开最左边的隔板30。
第一液压致动器39通过利用液压压力用活塞39a挤压隔板30来接合第一制动机构B1。此时,由于第二制动机构B2是脱开的,所以第二恒星齿轮S3是静止的。
在此状态下,第一恒星齿轮S2的旋转传输到短小齿轮P3,并且长小齿轮P2与静止的第二恒星齿轮S3啮合,使得共用齿轮架CR2以规定的预定速度转动从而以小的减速比将旋转传输到齿圈R2。结果,已稍微减慢的齿圈R2的旋转传输到输出轴19。
用于第二制动机构B2的液压致动器41(第二液压致动器)布置在延伸壳体23的后部中,亦即,布置在凸块23a与收容变速器9的马达外壳22之间。第二液压致动器41包括以流体密封方式配合在形成于壳体中的凹槽42内的双头活塞。
该双头活塞包括布置在作为油缸底的凹槽42的底部的第一活塞43、一端接触凹槽42的底部的反作用板44、布置在作为油缸底的反作用板44处并且其内周接触第一活塞43的第二活塞45、以及设置在固定到凸块23a的定位器47与第二活塞45之间的处于压缩状态的复位弹簧46。复位弹簧46推动第二活塞45离开最右边的隔板35。
第二液压致动器41通过利用液压压力用第二活塞45挤压隔板35来接合第二制动机构B2。此时,由于第一制动机构B1是脱开的,所以共用齿轮架CR2是静止的,而第二恒星齿轮S3可自由旋转。相应地,第一恒星齿轮S2的旋转以显著下降的速度经由小齿轮P2、P3传输到齿圈R2,并且齿圈R2的旋转传输到输出轴19。
亦即,在此实施方式中,混合动力驱动装置2包括设置在变速器9中的第一制动机构B1,变速器9将输入到转子轴14的动力传输到作为“旋转轴”的输出轴19,同时改变其旋转速度。
如图1所示,输出轴19经由挠性联轴节61联接到传动轴62。传动轴62联接到差动齿轮63。差动齿轮63将驱动力经由左、右驱动轴64传输到左、右后轮4。
控制电动马达6专门用作发电机。通过控制控制电动马达6的发电量,使用可变地改变传动速度的动力分配行星齿轮7将来自内燃发动机5的输出传输到输出轴19。
驱动电动马达8主要用作对车辆1补充驱动力的驱动马达。驱动电动马达8在例如车辆制动期间也可用作将车辆1的惯性力转换成电能的发电机。
内燃发动机5的输出经由减振器装置18和输入轴17传输到动力分配行星齿轮7。动力分配行星齿轮7将输出分配到控制电动马达6和输出轴19。通过控制控制电动马达6,从输出轴19输出的旋转速度被可变地调节。
来自驱动电动马达8的转子12的输出经由套轴20传输到变速器9,然后在变速器9以上述两个步骤中的任一步骤改变其旋转速度后传输到输出轴19。
然后,经由动力分配行星齿轮7分配到输出轴19的来自内燃发动机5的动力被补充以来自驱动电动马达8的其旋转速度经由变速器9改变的动力。输出轴19的动力经由挠性联轴节61、传动轴62和差动齿轮63传输到左、右驱动轴64以驱动左、右后轮4。
如图2所示,第一供应孔51形成为沿着联接输出轴19b的轴向延伸。第一供应孔51形成在联接输出轴19b的中心轴线上。第二供应孔52形成在延伸壳体23中。从油泵(未示出)排出的润滑剂供应到第二供应孔52。第二供应孔52与从第一供应孔51径向向外穿过的第一径向孔53连通。
多个径向孔54(第二径向孔)从第一供应孔51形成。与第二径向孔54连通的第三径向孔55、第四径向孔56和第五径向孔57分别形成在转子轴14、套轴20和第二恒星齿轮S3中。开口58形成在毂28中。开口58连通长小齿轮P2与毂28之间的空间和分隔壁24与毂28之间的空间。
因此,供应到第一供应孔51的润滑剂通过第二径向孔54和第三径向孔55供应到转子12,并且顺次通过第二径向孔54、第四径向孔56、第五径向孔57和开口58供应到第一制动机构B1。
在此实施方式中,具有第一供应孔51和第二径向孔54的联接输出轴19、具有第四径向孔56的套轴20、具有第五径向孔57的第二恒星齿轮S3以及具有开口58的毂28中的每一个都可视为本发明的“润滑剂供应装置”。
第一制动机构B1设置在分隔壁24附近,因为它由第一液压致动器39致动。另外,第一制动机构B1设置在马达外壳22的内周部,因为隔板30固定到马达外壳22的内周部。
在此实施方式中,通孔59形成在分隔壁24中以连通外壳空间G1和外壳空间G2,并且通孔59形成在定位于第一制动机构B1附近的马达外壳22的内周部,使得供应到第一制动机构B1的润滑剂经通孔59供应到定子16的绕组线16b。如图3所示,多个通孔59形成在分隔壁24中以便与花键槽29连通,并且所述多个通孔59沿马达外壳22的圆周方向设置。本发明中的描述“通孔形成在分隔壁中面对摩擦接合元件”是指此实施方式中的通孔59形成在第一制动机构B1附近。
在如上构造的实施方式中,从油泵排出的润滑剂从第二供应孔52经由第一径向孔53供应到第一供应孔51,并且通过联接输出轴19a、转子轴14和第二恒星齿轮S3的旋转引起的离心力经第二径向孔54径向向外排出。
内燃发动机5驱动的机械泵和电动马达驱动的电泵两者是结合使用的。当内燃发动机5未运行时润滑剂由电泵供应。
一部分润滑剂经转子轴14的第三径向孔55供应到转子12以冷却转子12。其它润滑剂经套轴20的第四径向孔56和第二恒星齿轮S3的第五径向孔57径向向外排出,此后从毂28与长小齿轮P2之间的空间经开口58排出到分隔壁24与毂28之间的空间,并且此后供应到第一制动机构B1以冷却第一制动机构B1(参看图4中的箭头M)。
在冷却第一制动机构B1后,润滑剂甩到马达外壳22的内周部上,此后沿马达外壳22的内周部移动,并且经通孔59排出到外壳空间G1中(参看图4中的箭头M)。排出到外壳空间G1中的润滑剂冷却绕组线16b,成滴状落下,并且循环到油盘(未示出)中。
如上所述,在依照此实施方式的混合动力驱动装置中,连通外壳空间G1、G2的通孔59形成在分隔壁24中,并且通孔59形成在定位于第一制动机构B1附近的马达外壳22的内周部处。因此,当润滑剂供应到第一制动机构B1时,润滑剂可从外壳空间G2经通孔59供应到外壳空间G1(参看图4中的箭头M)。
由于定子16固定到马达外壳22的内周部,所以变热的绕组线16b可被经通孔59供应的润滑剂冷却。
因此,供应到变速器9的第一制动机构B1的润滑剂供应到定位在转子12的径向外侧的绕组线16b。因此,可简化供应润滑剂以冷却驱动电动马达8的系统使得仅转子12被冷却。从而,可防止为有效地冷却驱动电动马达8而增加油泵容量,并防止车辆1的燃料经济性恶化。
在此实施方式中,形成在马达外壳22的内周部中的花键槽29与形成在隔板30的外周部上的花键30a配合,并且通孔59形成为穿过分隔壁24以便与花键槽29连通。因此,可保证充足的空间以形成通孔59。
在此实施方式中,分隔壁24仅具有形成在其中的通孔59。然而,管部件可附连到通孔59。具体而言,管部件的近端可附连到通孔59的位于外壳空间G1侧的开口端,并且管部件的远端可从近端延伸到绕组线16b附近。
这样,润滑剂可从设置在通孔59的开口端处的管部件供应到绕组线16b。因此,在管部件的远端朝绕组线16b的期望位置定向的情况下,绕组线16b的期望位置可被更有效地冷却。依照此实施方式的管的近端和远端可分别视为本发明的“第一端”和“第二端”。
依照此实施方式的外壳空间G1、G2可分别视为本发明的“第一空间”和“第二空间”。
尽管在第一实施方式中外壳空间G2收容变速器9,但本发明不局限于此,并且外壳空间G2可替代性地收容动力分配装置,如以下第二实施方式中所示。
图5是依照本发明第二实施方式的混合动力驱动装置的动力分配机构和控制电动马达的剖面图。在此实施方式中,收容动力分配机构的外壳空间和收容控制电动马达的外壳空间经由通孔彼此连通。
如图5所示,外壳主体71包括形成在其中的收容控制电动马达72的第一外壳空间G3,以及收容作为“动力分配装置”的动力分配机构73的第二外壳空间G4。第一外壳空间G3由作为“第一外壳部”的第一马达外壳74的内周部限定。第二外壳空间G4由第一马达外壳74和结合到第一马达外壳74的作为“第二外壳部”的第二马达外壳75的内周部限定。
分隔壁76设置在第一马达外壳74中以将第一外壳空间G3与第二外壳空间G4隔开。经由减振器装置(未示出)连接到内燃发动机的输入轴77设置在第一马达外壳74中以自由旋转。控制电动马达72的转子78的转子轴79花键配合在输入轴77的外周部上。
定子80的铁心80a固定到第一马达外壳74的内周部。产生磁场的绕组线80b设置在铁心80a的外周部。亦即,转子78以预定气隙设置在定子80的内周部中。转子78的转子轴79由第一马达外壳74经由滚珠轴承81、82以可转动方式支撑以与转子轴79一起旋转。
动力分配机构73为单个小齿轮型动力分配机构,并且可通过离合器C和制动机构B3在差动运动与非差动运动之间切换。
动力分配机构73包括旋转元件,例如恒星齿轮S1、小齿轮P1、支撑小齿轮P1以便在其自身轴线上旋转以及回转的齿轮架CA1、以及经由小齿轮P1与恒星齿轮S1啮合的齿圈R1。
齿轮架CA1经由输入轴77联接到内燃发动机。恒星齿轮S1经由恒星齿轮轴83联接到控制电动马达72的转子78的转子轴79。齿圈R1联接到配合在输入轴77上的中间轴84以自由地相对旋转。
制动机构B3设置在恒星齿轮S1与第一马达外壳74之间。离合器C设置在毂88和恒星齿轮S1与齿轮架CA1之间。
当离合器C和制动机构B3脱开时,形成差动运动,其中恒星齿轮S1、齿轮架CA1和齿圈R1可相对于彼此旋转。因此,内燃发动机的输出分配到控制电动马达72和中间轴84,并且内燃发动机的分配到控制电动马达72的输出致使控制电动马达72发电。
亦即,在此实施方式中,混合动力驱动装置包括设置在动力分配机构73中的制动机构B3,动力分配机构73将输入到作为“旋转轴”的输入轴77的动力分配到作为“输出轴”的中间轴84和转子轴79。
花键槽85沿圆周方向以规则间隔形成在第一马达外壳74的内周部中。花键86a形成在环形隔板86的外周部上,并且配合在花键槽85中。
花键槽85沿输入轴77的轴向延伸。隔板86沿输入轴77的轴向经由摩擦片87叠置。
摩擦片87沿输入轴77的轴向以预定间隔设置在毂88的外周部上,并且插入隔板86之间。在此实施方式中,制动机构(其对应于本发明的“摩擦接合元件”)B3由用作“第一摩擦部件”的隔板86和用作“第二摩擦部件”的摩擦片87组成。
止挡部件89设置在最右边的隔板86的右侧。止挡部件89沿轴向定位最右边的隔板86。
驱动制动机构B3的第三液压致动器90布置在第一马达外壳74的内周部。第三液压致动器90包括具有环形凹槽90b的油缸部件91,以及以流体密封方式配合在油缸部件91的凹槽90b中的活塞90a。
复位弹簧92以压缩状态设置在固定到油缸部件91的定位器93与活塞90a之间。复位弹簧92推动活塞90a离开最左边的隔板86。
第三液压致动器90通过利用液压压力用活塞90a挤压隔板86来接合制动机构B3。此时,内燃发动机的输出如上所述分配到控制电动马达72和中间轴84。
第三供应孔94和第四供应孔95沿轴向分别形成在中间轴84和输入轴77中。从油泵排出的润滑剂供应到第三供应孔94和第四供应孔95。
第四供应孔95与从其径向向外穿过的第五径向孔96和第六径向孔97连通。第五径向孔96与形成在转子轴79中的第七径向孔98连通。第六径向孔97与形成在恒星齿轮轴83中的第八径向孔99连通。第八径向孔99与穿过恒星齿轮S1、小齿轮P1和齿圈R1的第九径向孔100连通。
开口101形成在毂88中。开口101将从第九径向孔100排出的润滑剂引导到制动机构B3。在此实施方式中,“润滑剂供应装置”由具有第三供应孔94、第五径向孔96和第六径向孔97的中间轴84、具有第四供应孔95的输入轴77、具有第七径向孔98的转子轴79、具有第八径向孔99的恒星齿轮轴83、具有第九径向孔100的恒星齿轮S1、小齿轮P1、齿圈R1、以及具有开口101的毂88组成。
通孔102形成在分隔壁76中。通孔102连通第一外壳空间G3和第二外壳空间G4。通孔102形成在定位于制动机构B3附近的第一马达外壳74的内周部处。通孔102将供应到制动机构B3的润滑剂从第一外壳空间G3引导到第二外壳空间G4中,以冷却定子80的绕组线80b。
如第一实施方式中那样,通孔102形成在分隔壁76中以便与花键槽85连通。可设置与花键槽85相同数目的通孔102。
在以上实施方式中,从油泵排出的润滑剂经第三供应孔94和第四供应孔95供应到第五径向孔96。润滑剂通过输入轴77和转子轴79的旋转引起的离心力经第七径向孔98径向向外排出,并且供应到转子78以冷却转子78。
从第六径向孔97排出的润滑剂通过输入轴77、恒星齿轮S1、小齿轮P1和齿圈R1的旋转引起的离心力经第八径向孔99和第九径向孔100从齿圈R1径向向外排出,并且此后经开口101供应到制动机构B3以冷却制动机构B3。
在冷却制动机构B3后,润滑剂甩到马达外壳74的内周部上,并且经通孔102排出到第一外壳空间G3中。排出到第一外壳空间G3中的润滑剂冷却绕组线80b,并且然后被收集在油盘(未示出)中。
如上所述,在依照此实施方式的混合动力驱动装置中,连通第一外壳空间G3、第二外壳空间G4的通孔102形成在分隔壁76中,并且通孔102形成在定位于制动机构B3附近的第一马达外壳74的内周部处。因此,当润滑剂供应到制动机构B3时,润滑剂可从第二外壳空间G4经通孔102供应到第一外壳空间G3。
由于定子80固定到第一马达外壳74的内周部,所以变热的绕组线80b被经通孔102供应的润滑剂冷却。
因此,供应到动力分配机构73的制动机构B3的润滑剂可供应到定位在转子78的径向外侧的绕组线80b。因此,可简化供应润滑剂以冷却控制电动马达72的系统使得仅转子78被冷却。从而,不必增加油泵的容量以有效地冷却控制电动马达72,这避免了车辆的燃料经济性恶化。
在此实施方式中,花键槽85形成在第一马达外壳74的内周部中以与形成在隔板86的外周部上的花键86a配合,并且通孔102形成为穿过分隔壁76以与花键槽85连通。因此,提供了充足的空间以形成通孔102。
依照此实施方式的第一外壳空间G3、第二外壳空间G3可分别视为本发明的“第一空间”和“第二空间”。
在此实施方式中,只有通孔102形成在分隔壁76中。然而,管部件可附连到通孔102。具体而言,管部件的近端可附连到通孔102的位于第一外壳空间G3侧的开口端,并且管部件的远端可从近端延伸到绕组线80b附近。
这样,润滑剂从设置在通孔102的开口端处的管部件供应到绕组线80b。因此,在管部件的远端朝绕组线80b的期望位置定向的情况下,绕组线80b的期望位置可容易地更有效地冷却。依照此实施方式的管部件的近端和远端可分别视为本发明的“第一端”和“第二端”。
尽管在以上实施方式中两个外壳空间由一个分隔壁分隔并且形成通孔以连通外壳空间,但是控制电动马达、动力分配装置、驱动电动马达和变速器可收容在由多个分隔壁分隔的四个外壳空间中,并且可在每个分隔壁中形成通孔以连通相邻的外壳空间。
如以上所述,依照本发明的混合动力驱动装置具有更有效地冷却电动马达而无需增加油泵容量的效果,因此避免了车辆的燃料经济性恶化。依照本发明的混合动力驱动装置可用作安装在混合动力车辆上的混合动力驱动装置等以提高定子绕组线的冷却性能。
虽然已参照本发明的示例实施方式描述了本发明,但是应当理解,本发明不局限于这些示例实施方式或结构。相反,本发明旨在涵盖各种改型和等同装置。另外,虽然以各种示例性的组合和构造示出了示例实施方式的各种元件,但是包括更多、更少或仅单个元件的其他组合和构造也在本发明的精神和范围内。

Claims (12)

1.一种混合动力驱动装置,包括:
外壳主体(10,71),所述外壳主体具有i)至少一个分隔壁(24,76),ii)第一外壳部(22,74),以及iii)第二外壳部(22a,23,75),在所述外壳主体中分别形成有由所述分隔壁(24,76)分隔的第一空间(G1,G3)和第二空间(G2,G4);
电动马达(8,72),所述电动马达包括i)固定到所述第一外壳部(22,74)并具有绕组线(16b,80b)的定子(16,80),ii)以可转动方式设置在所述定子(16,80)中的转子轴(14,79),以及iii)固定到所述转子轴(14,79)的转子(12,78);
旋转轴(19,77),所述旋转轴与所述转子轴(14,79)同轴并且能够与所述转子轴(14,79)一起旋转;
摩擦接合元件(B1,B3),所述摩擦接合元件包括i)花键联接到所述第二外壳部(22a,23,75)的内周部的第一摩擦部件(30,86),ii)由所述旋转轴(19,77)支撑的毂(28,88),以及iii)花键联接到所述毂(28,88)并且与所述第一摩擦部件(30,86)摩擦接合或非摩擦接合的第二摩擦部件(31,87);以及
润滑剂供应装置,所述润滑剂供应装置用于将润滑剂供应到所述摩擦接合元件(B1,B3),所述摩擦接合元件(B1,B3)设置在所述分隔壁(24,76)附近,
所述混合动力驱动装置的特征在于,在所述分隔壁(24,76)中形成有连通所述第一空间(G1,G3)和所述第二空间(G2,G4)的通孔(59,102),并且所述通孔面对所述摩擦接合元件(B1,B3),
其中,所述润滑剂被供应到所述摩擦接合元件(B1,B3),并且随后所述润滑剂被顺次供应到所述第二空间(G2,G4)、所述通孔(59,102)和所述第一空间(G1,G3)以冷却所述绕组线(16b,80b)。
2.如权利要求1所述的混合动力驱动装置,其中,所述通孔(59,102)形成在所述外壳主体(10,71)的内周部处的所述分隔壁(24,76)中。
3.如权利要求1或2所述的混合动力驱动装置,其中,所述定子(16,80)固定到所述第一外壳部(22,74)的内周部。
4.如权利要求1或2所述的混合动力驱动装置,其中,所述润滑剂供应装置供应润滑剂中的一部分到所述摩擦接合元件(B1,B3),并且供应润滑剂中的其他部分以冷却所述转子(12,78)。
5.如权利要求1或2所述的混合动力驱动装置,其中,所述摩擦接合元件(B1)通过用作为变速器(9)的一部分来控制输入到所述毂(28)的动力,所述变速器(9)将输入到所述转子轴(14)的动力在变速后传输到所述旋转轴(19)。
6.如权利要求1或2所述的混合动力驱动装置,其中,所述摩擦接合元件(B3)通过用作为动力分配装置(73)的一部分来控制输入到所述毂(88)的动力,所述动力分配装置(73)将输入到所述旋转轴(77)的动力分配到所述转子轴(79)和输出轴(84)。
7.如权利要求1或2所述的混合动力驱动装置,其中,所述摩擦接合元件(B1,B3)为制动机构。
8.如权利要求1或2所述的混合动力驱动装置,其中:
在所述第二外壳部(22a,23,75)的内周部中形成有花键槽(29,85);
在所述第一摩擦部件(30,86)的外周部上形成有花键,所述花键与所述花键槽(29,85)配合;以及
所述通孔(59,102)形成在所述分隔壁(24,76)中以便与所述花键槽(29,85)连通。
9.如权利要求8所述的混合动力驱动装置,其中,沿所述第一外壳部(22,74)的圆周方向在所述分隔壁(24,76)中设置有多个所述通孔(59,102)。
10.如权利要求8所述的混合动力驱动装置,其中,设置有与花键槽(29,85)数目相同的通孔(59,102)。
11.如权利要求9所述的混合动力驱动装置,其中,设置有与花键槽(29,85)数目相同的通孔(59,102)。
12.如权利要求1或2所述的混合动力驱动装置,其特征在于,所述混合动力驱动装置还包括具有第一端和第二端的管部件,
其中,所述第一端附连到所述通孔(59,102)的位于所述第一外壳部(22,74)侧的开口端,并且所述第二端从所述第一端朝向所述绕组线(16b,80b)延伸。
CN2008800157316A 2007-05-11 2008-05-09 混合动力驱动装置 Expired - Fee Related CN101678749B (zh)

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