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    HARVESTER HEAD REEL SEGMENTS SYNCHRONIZATION
    1.
    发明公开
    HARVESTER HEAD REEL SEGMENTS SYNCHRONIZATION 审中-公开

    公开(公告)号：EP3420798A1

    公开(公告)日：2019-01-02

    申请号：EP18179534.5

    申请日：2018-06-25

    申请人： Deere & Company

    发明人： Hunt, Timothy ,  Marvin, Paul D ,  Rajendran, Madan

    IPC分类号： A01D41/14 ,  A01D57/02 ,  A01D57/04 ,  A01D57/05

    摘要： A harvester head may include a position adjustable reel having a first segment and a second segment, a hydraulic supply comprising a pump and a reservoir, a first plurality of hydraulic cylinders coupled to the first segment to reposition the first segment, a second plurality of hydraulic cylinders coupled to the second segment to reposition the second segment, a first bidirectional valve operably coupled between the hydraulic supply and the first plurality of hydraulic cylinders, a second bidirectional valve operably coupled between the hydraulic supply and the second plurality of hydraulic cylinders, at least one sensor to sense relative positioning of the first segment and the second segment and a controller. The controller may output control signals to the first bidirectional valve and the second bidirectional valve based upon signals from the at least one sensor to synchronize positioning of the first segment and the second segment.

    HARVESTER HEAD REEL REPHASING
    4.
    发明公开
    HARVESTER HEAD REEL REPHASING 审中-公开

    公开(公告)号：EP3420801A1

    公开(公告)日：2019-01-02

    申请号：EP18179536.0

    申请日：2018-06-25

    申请人： Deere & Company

    发明人： Hunt, Timothy ,  Marvin, Paul D AA ,  Rajendran, Madan

    IPC分类号： A01D57/04

    摘要： A rephasing system may include a first hydraulic cylinder, a second hydraulic cylinder, a first rephasing valve, a second rephasing valve and a controller. The first hydraulic cylinder and the second hydraulic cylinder first and second pistons, respectively. A first hydraulic fluid line connects a hydraulic supply to a first side of the first piston while a second hydraulic fluid line connects a second side of the first piston to a first side of the second piston. The first rephasing valve fluidly couples the first side of the first piston to the first side of the second piston while the second hydraulic fluid line fluidly couples the second side of the second piston to the hydraulic supply. The controller selectively opens and closes the first and second rephasing valves to re-phase the first and second pistons.