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    Halting the sickle bar of a sickle cutting apparatus at a predetermined position
    2.
    发明授权
    Halting the sickle bar of a sickle cutting apparatus at a predetermined position 有权

    公开(公告)号：US10149431B2

    公开(公告)日：2018-12-11

    申请号：US14937180

    申请日：2015-11-10

    申请人： Macdon Industries Ltd.

    发明人： James Thomas Dunn ,  Bruce Robert Shearer

    IPC分类号： A01D34/13 ,  A01D34/40 ,  A01D34/14 ,  A01D34/30 ,  A01D101/00

    摘要： A sickle cutting system is mounted on a header for forward travel over ground having a standing crop thereon and includes a cutter bar with a plurality of knife guards and at least one sickle bar with a drive system for driving the sickle bar through repeated cycles of reciprocating movement from start-up of the system through to a shut-down. The drive system includes an arrangement to halt the sickle bar on shut-down at a predetermined position of the knife blades relative to the knife guards and preferably the position where the blades lie intermediate two knife guards. The system can be halted by either a physical stop member at the required position or by detecting the position of the sickle bar during operation and causing it to halt the required position. The detection can be carried out by counting pulses generated by markers on a rotary member of the drive system.

    Crop Harvesting Machine with Variable Header Float
    4.
    发明申请
    Crop Harvesting Machine with Variable Header Float 审中-公开

    公开(公告)号：US20200077585A1

    公开(公告)日：2020-03-12

    申请号：US15747859

    申请日：2017-06-19

    申请人： MacDon Industries Ltd.

    发明人： Jann Peter Garbald ,  James Thomas Dunn ,  Graham Michael Leverick ,  Russell George Lyons ,  Bruce Robert Shearer ,  Neil Gordon Barnett

    IPC分类号： A01D41/14 ,  A01B63/00 ,  A01B63/108 ,  A01D41/127

    摘要： In a crop harvesting machine there is provided a pair of hydraulic float cylinders or springs for a header such as a rotary mower relative to a self-propelled vehicle, where a float spring force is controlled to provide a predetermined lifting force is provided to the header. The spring force is varied in response to detection of ground speed to decrease the lifting force at higher ground speeds. A position sensor is used to generate an indication of movement and/or acceleration. The electronic control is arranged, in response to changes in the sensor signal, to temporarily change the control signal to vary the lifting force and thus change the dynamic response of the hydraulic float cylinder. In order to reduce static friction so that the system can react quickly, an arrangement is provided for causing relative reciprocating movement in an alternating wave pattern between the piston and cylinder.

    Dual Sickle Knife Drive
    6.
    发明申请
    Dual Sickle Knife Drive 审中-公开

    公开(公告)号：US20170127611A1

    公开(公告)日：2017-05-11

    申请号：US14936907

    申请日：2015-11-10

    申请人： Macdon Industries Ltd.

    发明人： James Thomas Dunn ,  Graham Michael Leverick ,  Lance Thomas Willer

    IPC分类号： A01D41/14 ,  A01D41/127 ,  A01D34/38 ,  A01D34/04 ,  A01D34/14

    CPC分类号： A01D41/141 ,  A01D34/04 ,  A01D34/14 ,  A01D34/30 ,  A01D34/38 ,  A01D41/1274 ,  A01D2101/00

    摘要： A sickle cutting system is mounted on a header for forward travel over ground having a standing crop thereon and includes a cutter bar with a plurality of knife guards and two opposed sickle bars driven in opposite phase with a drive system for driving the sickle bar through repeated cycles of reciprocating movement from start-up of the system through to a shut-down. The drive system includes a control device responsive to the sensor signals from both of the first and second drive systems for advancing or retarding one of the first and second drive systems so that a number of sensor signals obtained from the first drive system is continually maintained so as to be substantially equal to a number of sensor signals obtained from the second drive system to maintain the sickle bars in opposite phase.

    Crop Machine with an Electronically Controlled Hydraulic Cylinder Flotation System
    7.
    发明申请
    Crop Machine with an Electronically Controlled Hydraulic Cylinder Flotation System 审中-公开

    公开(公告)号：US20200221637A1

    公开(公告)日：2020-07-16

    申请号：US16788475

    申请日：2020-02-12

    申请人： MacDon Industries Ltd.

    发明人： James Thomas Dunn ,  Graham Michael Leverick ,  Russell George Lyons ,  Bruce Robert Shearer ,  Kyle Edward Boch

    IPC分类号： A01D41/14 ,  A01B63/00 ,  A01B63/108 ,  A01D41/127

    摘要： A header is supported by a pair of hydraulic float cylinders, where a float pressure to the cylinders is directly controlled by an electronic control supplying a variable control signal to a PPRR valve arrangement to maintain the float pressure at a predetermined value. At the set pressure a predetermined lifting force is provided to the header. A position sensor is used to generate an indication of movement and/or acceleration and/or velocity. The electronic control is arranged, in response to changes in the sensor signal, to temporarily change the control signal to vary the lifting force and thus change the dynamic response of the hydraulic float cylinder. A lift force greater than that required to lift the header can be provided by a lift cylinder and can be opposed in a controlled manner to apply a controlled downforce by the back of the same cylinder or by a separate component.

    Halting the Sickle Bar of a Sickle Cutting apparatus at a Predetermined Position
    9.
    发明申请
    Halting the Sickle Bar of a Sickle Cutting apparatus at a Predetermined Position 审中-公开

    公开(公告)号：US20170127609A1

    公开(公告)日：2017-05-11

    申请号：US14937180

    申请日：2015-11-10

    申请人： Macdon Industries Ltd.

    发明人： James Thomas Dunn ,  Bruce Robert Shearer

    IPC分类号： A01D34/40 ,  A01D34/14

    CPC分类号： A01D34/40 ,  A01D34/14 ,  A01D34/30 ,  A01D2101/00

    摘要： A sickle cutting system is mounted on a header for forward travel over ground having a standing crop thereon and includes a cutter bar with a plurality of knife guards and at least one sickle bar with a drive system for driving the sickle bar through repeated cycles of reciprocating movement from start-up of the system through to a shut-down. The drive system includes an arrangement to halt the sickle bar on shut-down at a predetermined position of the knife blades relative to the knife guards and preferably the position where the blades lie intermediate two knife guards. The system can be halted by either a physical stop member at the required position or by detecting the position of the sickle bar during operation and causing it to halt the required position. The detection can be carried out by counting pulses generated by markers on a rotary member of the drive system.

    DRAPER HEADER WITH AUTOMATIC REEL TO CUTTER BAR CLEARANCE
    10.
    发明公开
    DRAPER HEADER WITH AUTOMATIC REEL TO CUTTER BAR CLEARANCE 审中-公开

    公开(公告)号：US20230397537A1

    公开(公告)日：2023-12-14

    申请号：US18032310

    申请日：2021-10-18

    申请人： MACDON INDUSTRIES LTD.

    发明人： Garrett Malkowich ,  Bruce Robert Shearer ,  James Thomas Dunn

    IPC分类号： A01D57/04 ,  A01D34/28

    CPC分类号： A01D57/04 ,  A01D34/286

    摘要： A draper header for harvesting crops includes a header frame with a middle frame section pivotally coupled between a pair of side wing sections. A cutter bar assembly extends across a front portion of the header frame and is flexible with the side wing sections for cutting the crops to be harvested. A pair of crop pick-up reels are rotatably supported by center and outer reel support arms for engaging the crops to be harvested. A sensing system is operatively coupled to the header frame for detecting when at least one of the side wing sections pivots downwardly relative to the middle frame section. When the sensing system detects that at least one of the side wing sections pivots downwardly past a predetermined pivot angle, a down-stop cylinder is actuated to raise the crop pick-up reels, thereby preventing contact of the crop pick-up reels with the cutter bar assembly.