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    Stacked planetary gear assembly with improved lubrication
    61.
    发明授权
    Stacked planetary gear assembly with improved lubrication 有权

    公开(公告)号：US09803742B1

    公开(公告)日：2017-10-31

    申请号：US15212926

    申请日：2016-07-18

    Applicant: GM Global Technology Operations LLC

    Inventor： Kothamasi Sumithra Raju ,  Sudipto Ray ,  Leonid Basin ,  Hai Xu ,  Avinash Singh

    IPC: F16H47/04 ,  F16H57/04 ,  F16H1/46 ,  F16H57/08

    CPC classification number: F16H57/043 ,  F16H1/46 ,  F16H57/0484 ,  F16H57/0486 ,  F16H57/082 ,  F16H2003/442

    Abstract: A radially stacked planetary gear assembly provides improved lubrication fluid flow to the planet gear bearings of an outer planetary gear set which is especially important when the housing or outer planetary gear carrier is stationary. The assembly includes radially aligned or stacked inner and outer planetary gear sets each having a sun gear, a ring gear and a carrier having planet gears in constant mesh with the sun and ring gears wherein the ring gear of the inner gear set is also the sun gear of the outer gear set and the outer carrier is the assembly housing. The sun gear is disposed on a transmission shaft having lubrication passages which aligns with pluralities of radial openings in a hub housing. A circular plate or guide adjacent one side of the housing includes channels which align with the openings and functions as a lubrication director, channeling lubrication from the transmission shaft and the pluralities of radial openings in the housing hub to the outer bearings, shafts and planet gears.

    Powertrain for automatic transmission
    67.
    发明授权
    Powertrain for automatic transmission 有权

    公开(公告)号：US09702440B2

    公开(公告)日：2017-07-11

    申请号：US14773566

    申请日：2013-03-14

    Applicant: Cheol Jin Kim

    Inventor： Cheol Jin Kim

    IPC: F16H3/66 ,  F16H3/44

    CPC classification number: F16H3/666 ,  F16H3/66 ,  F16H2003/442 ,  F16H2200/006 ,  F16H2200/0086 ,  F16H2200/201 ,  F16H2200/2046 ,  F16H2200/2097

    Abstract: The present invention relates to a powertrain for an automatic transmission. The powertrain for an automatic transmission consisting of an input shaft, an output shaft and first to third planetary gear sets comprises: first to seventh actuating elements constituting the first to third planetary gear sets; and shifting elements including first to fourth clutches and first and second brakes, wherein at least two of the shifting elements are actuated so that the first to seventh actuating elements are driven or restrained, thereby implementing eight forward speed and two reverse speed ratios.

    AUTOMATIC TRANSMISSION
    69.
    发明申请
    AUTOMATIC TRANSMISSION 有权

    公开(公告)号：US20170146113A1

    公开(公告)日：2017-05-25

    申请号：US15316808

    申请日：2015-05-28

    Applicant: MAZDA MOTOR CORPORATION

    Inventor： Tatsuhiko IWASAKI ,  Shinya KAMADA

    IPC: F16H57/04 ,  F16H57/08 ,  F16H3/66

    CPC classification number: F16H57/0479 ,  F16H3/66 ,  F16H57/043 ,  F16H57/0484 ,  F16H57/082 ,  F16H2003/442 ,  F16H2200/201

    Abstract: An automatic transmission (1) includes first, second, and third planetary gear sets (10, 20, 30) and a lubricant feed passage (L2). The first and second planetary gear sets (10, 20) form a two-stage planetary gear set (40). The third planetary gear set (30) is adjacent to the two-stage planetary gear set on one axial side of the automatic transmission. The lubricant feed passage (L2) feeds a lubricant to a bearing (25) of the second planetary gear set located on an outer periphery of the two-stage planetary gear set (40). The lubricant feed passage feeds the lubricant from a first inlet (37e) to the bearing via a first oil passage (37f) and oil passages (26a, 26b, 26c) in a pinion shaft. The first inlet (37e) is formed on a side of a carrier body (37) opposite to the two-stage planetary gear set and on an inner periphery of the automatic transmission.

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