CN101111984A - 具有旋转电机的驱动设备 - Google Patents

具有旋转电机的驱动设备 Download PDF

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Publication number
CN101111984A
CN101111984A CNA2005800476426A CN200580047642A CN101111984A CN 101111984 A CN101111984 A CN 101111984A CN A2005800476426 A CNA2005800476426 A CN A2005800476426A CN 200580047642 A CN200580047642 A CN 200580047642A CN 101111984 A CN101111984 A CN 101111984A
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China
Prior art keywords
drive axle
rotating machine
electric rotating
housing
stator core
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CNA2005800476426A
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CN101111984B (zh
Inventor
水野阳太
岛田裕司
畑祐志
大川彰人
丹下钦词
吉井欣也
足立昌俊
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Toyota Motor Corp
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Toyota Motor Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
    • B60K6/26—Arrangement 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 motors or the generators
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    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
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    • B60K6/365—Arrangement 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 with the gears having orbital motion
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    • B60K6/00—Arrangement 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
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    • B60K6/22—Arrangement 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
    • B60K6/40—Arrangement 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 assembly or relative disposition of components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
    • B60K6/40—Arrangement 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 assembly or relative disposition of components
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    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F16H3/727—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path
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    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
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Abstract

一种驱动桥(1)，包括具有开口(24)的壳体(20)、容纳在所述壳体(20)的所述开口(24)中并具有定子芯(230)的第二旋转电机(200)、容纳在驱动桥壳体(20)中并连接至第二旋转电机(200)的后行星齿轮系(400)、密封所述开口(24)的驱动桥后封盖(30)、以及将所述第二旋转电机(200)固定至所述驱动桥壳体(20)的螺栓(215)。所述定子(230)具有界定其轴向长度的第一和第二推力端面(211、212)。所述第一推力端面(211)被压靠所述壳体的内表面(21)。

Description

具有旋转电机的驱动设备
技术领域
本发明涉及具有旋转电机的驱动设备，并更具体而言，涉及安装在车辆上的具有旋转电机的驱动设备。
背景技术
例如在日本专利早期公开号2004-254434(专利文献1)中已经揭示了安装在车辆上的具有旋转电机的驱动设备。日本专利早期公开号2003-191759(专利文献2)、59-209053(专利文献3)、2001-69717(专利文献4)以及2002-171717(专利文献5)揭示了一种旋转电机。
发明内容
在现有的具有旋转电机的驱动设备中，存在因构成驱动设备的齿轮啮合所引起并通过壳体传递的振动以及通过旋转电机的转子轴传递的振动引起谐振、并由此导致齿轮噪音的问题。
旨在解决上述问题而完成了本发明。本发明的目的在于提供一种可减小噪音产生的具有旋转电机的驱动设备。
根据本发明的具有旋转电机的驱动设备包括具有开口的壳体；容纳在所述壳体的所述开口中并具有定子芯的旋转电机；容纳在所述壳体中并连接至所述旋转电机的齿轮；密封所述开口的封盖；以及将所述旋转电机固定至所述壳体的紧固件。所述定子具有界定其轴向长度的第一和第二推力端面，并且所述第一推力端面被压靠所述壳体的内表面。
在如上构造的具有旋转电机的驱动设备中，因为定子的第一推力端面被压靠壳体的内表面，故壳体与定子彼此结合为一体以增大壳体的表观质量。由此可以防止壳体自身的振动并可减小噪音的产生。
优选地，所述定子具有所述定子芯，且所述定子芯与所述壳体的所述内表面接触。
优选地，所述定子的端部与所述壳体的所述内表面彼此接触。
优选地，所述定子与所述壳体的所述内表面在所述定子的沿竖直方向的下侧处彼此接触。
优选地，所述具有旋转电机的驱动设备还包括推压构件，其用于在径向上(在定子的半径方向上)推压所述定子芯以使得所述定子芯的外周表面与所述壳体的所述内表面接触。通过所述紧固件将所述推压构件固定至所述定子芯。
优选地，在所述壳体与所述封盖接触的一侧处，所述定子芯与所述壳体的所述内表面彼此接触。
优选地，所述定子具有线圈，并且所述线圈与所述封盖彼此接触。
附图说明
图1是根据本发明的第一实施例的驱动桥(transaxle)的剖视图。
图2是振动传递路径的框图。
图3是根据本发明的第二实施例的驱动桥的剖视图。
图4是图3中金属紧固件的放大正视图。
图5是沿图4中的线V-V所取的剖视图。
图6是根据本发明的第三实施例的驱动桥的剖视图。
图7是从图1中箭头VII所示的方向上观察的驱动桥的侧视图。
具体实施方式
以下，将参考附图对本发明的实施例进行描述。在以下实施例中，由相同的标号表示相同或相应的部分，且将不再重复对其的描述。
(第一实施例)
图1是根据本发明的第一实施例的驱动桥的剖视图。参考图1，根据本发明的第一实施例的驱动桥1包括驱动桥外壳10、连接至驱动桥外壳10的驱动桥壳体20、以及密封驱动桥壳体20的端部的驱动桥后封盖30。在由驱动桥外壳10、驱动桥壳体20及驱动桥后封盖30包围的空间内容纳有驱动桥阻尼器500、第一旋转电机100、第二旋转电机200、前行星齿轮系300、后行星齿轮系400以及动力传动系600。
第二旋转电机200作为用于驱动的电动机且第一旋转电机100作为发电的发电机容纳在驱动桥1中。
驱动桥阻尼器500是对来自连接至发动机的轴501的驱动力进行传递并由盘簧阻尼器构成的机构。此外，通过具有干式单片摩擦材料的转矩波动吸收机构，驱动桥阻尼器500用于吸收来自发动机的驱动力中的转矩波动。
第一旋转电机100设置于驱动桥阻尼器500的外周，并具有作为旋转元件的转子轴150、设置在转子轴150的外周处的转子140以及使转子140旋转的定子130。在本实施例中，第一旋转电机100起发电机的作用，但本发明并不限于此设置，第一旋转电机100也可起电动机的作用。此外，可进行切换使得第一旋转电机100依需要起电动机或发电机的作用。
转子轴150设置于主轴310的外周处，并可以与主轴310分离并独立地旋转。在驱动桥外壳10中通过轴承来支撑转子轴150。
转子140固定至转子轴150的外周。转子140具有其中电磁钢板彼此叠置且在推力方向上延伸的永磁体嵌入在钢板内的结构。第一旋转电机100是所谓的三相电机，并通过在转子140上施加电磁力来使转子140旋转。
在定子与转子140相对的状态下，定子130通过螺栓115固定至驱动桥外壳10。定子130包括由彼此叠置的电磁钢板构成的定子芯110以及缠绕定子芯110的线圈120。就缠绕线圈120的方法而言，可以使用分布缠绕法或集中缠绕法。作为环形定子芯110的一个端面的第一推力端面111与驱动桥外壳10接触，同时作为另一端面的第二推力端面112与驱动桥外壳10分隔。
在前行星齿轮系与第一旋转电机100相邻的状态下将前行星齿轮系300绕主轴310设置。前行星齿轮系300具有太阳轮301、与太阳轮301啮合的小齿轮302、与小齿轮302啮合的齿圈303、以及保持小齿轮302的行星轮架304。太阳轮301连接至转子轴150以与转子轴150一同旋转。行星轮架304与主轴310一同旋转。通过中间驱动轴承(counter drivebearing)321将齿圈303保持在驱动桥外壳10内。
另一根轴311被布置为与主轴310连接。第二旋转电机200绕轴311布置。在本实施例中，第二旋转电机200是电动机，但第二旋转电机200并不限于是电动机，也可以作为发电机来驱动。此外，可进行切换使得第二旋转电机200依需要作为电动机或发电机工作。
转子轴250通过转子轴轴承322保持在驱动桥壳体20中，并与转子240结合。转子240由彼此叠置的电磁钢板(永磁体嵌入在其间)构成。
在定子与转子240的外周相对的状态下将定子230布置在驱动桥壳体20内。定子230具有由彼此叠置的电磁钢板构成的定子芯210以及缠绕定子芯210的线圈220。定子芯210具有界定其轴向长度的第一和第二推力端面211和212。第一推力端面211是接近发动机的端面，而第二推力端面212是远离发动机的端面。
作为径向表面的外周表面213位于第一推力端面211与第二推力端面212之间，并呈圆筒状。第一推力端面211与驱动桥壳体20直接接触。相反，第二推力端面212并未与驱动桥壳体20的内表面21直接接触。设置有孔通过定子芯210，且螺栓215插入该孔内。螺栓215拧入驱动桥壳体20的壁表面以在轴向上推压定子芯210。由此，定子芯210的第一推力端面211被压靠至驱动桥壳体20。在周向上设置多个螺栓215。在定子芯210的下侧处，外周表面213与驱动桥壳体20的内表面21接触。所述接触可以是线接触或是面接触。此外，可以设置减振构件以与接触区域配合。在此情况下，减振构件被夹置在内表面21与外周表面213之间。
后行星齿轮系400与第二旋转电机200相邻布置。后行星齿轮系400具有连接至转子轴250的太阳轮401、与太阳轮401啮合的小齿轮402、与小齿轮402啮合的齿圈303、以及保持小齿轮402的行星轮架404。前行星齿轮系300与后行星齿轮系400共用齿圈303，且动力经由齿圈303在前行星齿轮系300与后行星齿轮系400之间传递。
动力传动系600具有与齿圈303的外周齿啮合的从动齿轮601、与从动齿轮601连接的小齿轮602、与小齿轮602啮合的齿圈603、由齿圈603保持以与齿圈603一同旋转的差动齿轮箱604、容纳在差动齿轮箱604中的小齿轮轴605、由小齿轮轴605可旋转地保持并能够回转的小齿轮606、与小齿轮606n啮合的侧齿轮607、以及连接至侧齿轮607的驱动轴608。驱动桥壳体20具有作为内部空间的开口24，且驱动桥后封盖30密封该开口。驱动桥后封盖30是封盖元件，并与轴311的端面相对布置。驱动桥后封盖30通过螺栓35连接至驱动桥壳体20作为驱动桥1的端面。驱动桥1的驱动桥外壳10一侧被连接至发动机而驱动桥后封盖30一侧被布置远离发动机。因此，当将驱动桥1视为一整体时，驱动桥外壳10是振动的固定端而驱动桥后封盖30一侧是振动的自由端。
换言之，作为根据本发明的具有旋转电机的驱动设备的驱动桥1包括具有开口24的驱动桥壳体20、容纳在驱动桥壳体20的开口24内的第二旋转电机200、作为齿轮(gear wheel)容纳在驱动桥壳体20中并连接至第二旋转电机200的太阳轮401、小齿轮402及齿圈303、密封开口24的驱动桥后封盖30以及作为紧固件将第二旋转电机200固定至驱动桥壳体20的螺栓215。定子230具有界定其轴向长度的第一和第二推力端面211和212。第一推力端面211被压靠驱动桥壳体20的内表面21。
定子230具有定子芯210，且定子芯210与驱动桥壳体20的内表面21接触。定子芯210的端部与驱动桥壳体20的内表面21接触。
图2是在驱动桥中振动传递路径的框图。参考图2，在驱动桥1中，在后行星齿轮系400中产生振动。振动由构成后行星齿轮系400的作为螺旋齿轮的太阳轮401、小齿轮402以及齿圈303产生。振动的一部分经由转子轴承322及驱动桥壳体20传递至驱动桥后封盖30。此外，在后行星齿轮系400中产生的振动通过中间驱动轴承321、驱动桥壳体20及定子230返回至驱动桥壳体20，且驱动桥壳体20产生驱动桥后封盖30的谐振。该谐振造成散发的噪声。根据本发明，在上述振动传递路径中，驱动桥壳体20与定子230彼此固定以增大其表观质量。由此减小了通过驱动桥壳体20及定子230的振动。此外，当定子230的下部与驱动桥壳体20发生接触时，因为定子230的下部为相反相位(inverse phase)，故进一步减小了噪声。如图1所示，因为在驱动桥后封盖30一侧于定子230的外周表面213上是内表面21与定子芯210彼此接触，故可以更有效地减小振动。
(第二实施例)
图3是根据本发明的第二实施例的驱动桥的剖视图。参考图3，在根据本发明的第二实施例的驱动桥1中，定子230通过紧固件261被固定至驱动桥壳体20。定子230以间隙配合悬架并通过螺栓215固定至驱动桥壳体20。利用夹在螺栓215的承载表面与定子芯210之间的紧固件261来定位定子230。紧固件261具有前端263，前端263为楔状并由弹簧钢制成。前端263配合在驱动桥壳体20与定子芯210之间以弹性变形。前端263也可塑性变形。在定子芯210与驱动桥壳体20之间设置了弹簧钢的楔部可插入的间隙。在本实施例中，紧固件216由弹簧钢制成，但本发明并不限于此，紧固件261例如也可由塑料制成。紧固件261具有硬化构件262。因为前端263配合在驱动桥壳体20与定子芯210之间，故前端263在径向上推压定子芯210。
图4是图3中紧固件的放大正视图。图5是沿图4中的线V-V所取的剖视图。参考图4及图5，紧固件261具有弯曲形状，且其末端被折弯成“V形”以形成前端263。紧固件261的上侧为U形，以接收螺栓215。在硬化构件262及紧固件261中，设置有螺栓215穿过其的通孔266、265。硬化构件262在塑性变形之后硬化并可接触前端263。
可以设置单个或多个紧固件261，优选地至少设置三个紧固件261。紧固件261的前端263进入驱动桥壳体20与定子芯210之间，且定子230被相对于转子轴250无偏心地对中。当进一步紧固螺栓215时，前端263的后端部与将塑性变形然后机械硬化的硬化构件262配合，由此楔形部(前端263)不会变形，且定子230被相对于转子轴250无偏心地对中并固定。
在第二实施例中，设置紧固件261作为推压构件，其通过在径向方向上推压定子芯210而使外周表面213与驱动桥壳体20的内表面21接触。紧固件261通过螺栓215固定至定子芯210。
利用根据第二实施例的如上构造的驱动设备，通过将定子芯210压靠驱动桥壳体20从而消除了侧隙(backlash)并进一步减小了振动的产生。
(第三实施例)
图6是根据本发明的第三实施例的驱动桥的剖视图。参考图6，根据本发明的第三实施例的驱动桥1与根据第一实施例的驱动桥1的差异在于线圈220与驱动桥后封盖30接触。换言之，驱动桥后封盖30与线圈220彼此接触结合为一体以增大驱动桥后封盖30的表观质量，由此防止驱动桥后封盖30的谐振并减小散发噪音的产生。为了使驱动桥后封盖30与线圈220之间的接触更可靠，可在两者之间设置粘合剂等。此外，可在驱动桥后封盖30与线圈220之间设置减振材料。
根据第三实施例的如上构造的驱动桥，可以获得类似于根据第一实施例的驱动桥可获得的技术效果。
(第四实施例)
图7是在由图1中的箭头VII所示的方向上观察的驱动桥的侧视图。在第四实施例中，使定子芯210的不同部分与驱动桥壳体20接触以确定哪个部件应当进行接触以最有效地减小噪音的产生。图7中的箭头G示出了竖直方向中向下的方向，且定子芯210在以下其中一个区域处与驱动桥壳体20耦合，所述区域包括上部的第一区域721、左上部的第二区域722、左下部的第三区域723、下部的第四区域以及右部的第五区域725。结果，发现当驱动桥壳体20在位于下部的第四区域724处与定子芯210接触时可最有效地减小噪音的发生，这是因为定子芯210的下部的横向振动相对于后封盖的平面外振动(out-of-plane vibration)为相反相位，且当在该部分处进行接触时上述横向振动可用于抵消后封盖的横向振动。
已经描述了本发明的实施例，但可以各种不同方式对这里所示的实施例进行修改。尽管在上述实施列中定子230与驱动桥壳体20直接接触，但可在其间设置诸如橡胶的振动控制构件。此外，可向定子230注入至少一定量的结合材料(例如漆)以增大定子芯210与线圈220之间的结合强度以提高定子230的衰减性能。可通过除漆以外的其他材料来增大结合刚度以增大定子芯210与线圈220之间的结合强度。
应当理解这里揭示的实施例在各个方面均为说明而非限制。本发明的范围由权利要求的条款而非以上说明界定，且本发明的范围意在涵盖落入与权利要求的条款相等同的范围和含义内的任何改变。
工业应用性
本发明例如可应用于安装在车辆上的、具有旋转电机的驱动设备。

Claims (7)

1.一种具有旋转电机的驱动设备，包括：
具有开口(24)的壳体(20)；
容纳在所述壳体(20)的所述开口(24)中并具有定子芯(230)的旋转电机(200)；
容纳在所述壳体(20)中并连接至所述旋转电机(200)的齿轮(301、302、303)；
密封所述开口(24)的封盖(30)；以及
将所述旋转电机(200)固定至所述壳体(20)的紧固件(215)，其由
所述定子(230)具有界定其轴向长度的第一和第二推力端面(211，212)，并且
所述第一推力端面(211)被压靠所述壳体(20)的内表面(21)。
2.根据权利要求1所述的具有旋转电机的驱动设备，其中，所述定子(230)具有所述定子芯(210)，且所述定子芯(210)与所述壳体(20)的所述内表面(21)接触。
3.根据权利要求2所述的具有旋转电机的驱动设备，其中，所述定子芯(230)的端部与所述壳体(20)的所述内表面(21)彼此接触。
4.根据权利要求3所述的具有旋转电机的驱动设备，其中，所述定子(200)与所述壳体(20)的所述内表面(21)在所述定子(200)的沿竖直方向的下侧处彼此接触。
5.根据权利要求2所述的具有旋转电机的驱动设备，还包括推压构件(261)，其通过在径向上推压所述定子芯(230)使得所述定子芯(230)的外周表面(213)与所述壳体(20)的所述内表面(21)接触，其中通过所述紧固件(215)将所述推压构件(261)固定至所述定子芯(230)。
6.根据权利要求1所述的具有旋转电机的驱动设备，其中，所述定子芯(230)与所述壳体(20)的所述内表面(21)在所述壳体(20)与所述封盖(30)接触的一侧处彼此接触。
7.根据权利要求1所述的具有旋转电机的驱动设备，其中，所述定子(200)具有线圈(220)，并且所述线圈(220)与所述封盖(30)彼此接触。
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