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公开(公告)号：US20200000032A1
公开(公告)日：2020-01-02
申请号：US16113521
申请日：2018-08-27
摘要： In a crop harvesting header with a center section and two wings where each wing is pivotal relative to the center section about a pivot axis extending in a generally forward direction which includes a balance system to maintain a balanced ground force distribution across the width of the header there is provided an automatic adjustment system for maintaining proper balance. The system includes a sensor which repeatedly, over a time period during which the header is operating, detects data relating to the positions, distance from the ground or weight applied to the ground of each wing frame portion, a processor arranged in response to the sensed data to calculate a value representative of the positions and an adjustment mechanism for effecting an adjustment of the balance system in response to the value.
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公开(公告)号：US20190230858A1
公开(公告)日：2019-08-01
申请号：US16214335
申请日：2018-12-10
发明人： Bruce Robert Shearer
CPC分类号： A01D41/145 , A01D41/141 , A01D57/20
摘要： A crop header having a frame mounted on a vehicle has a sickle cutter bar and a draper. The draper is guided at its front edge by a longitudinally extending rail mounted on the frame. The cutter bar is mounted at spaced positions by spring blades attached to a fixed beam at the rear which allow up and down flexing movement of the cutter bar relative to the draper rail. At the center discharge the cutter bar is carried on shorter blades which are carried on a beam in front of the front draper roller. A locking device is provided for commonly and automatically moving the beam in a direction to lift the cutter bar into a raised position in which the cutter bar is locked against flexing movement with the locking device being operable in response to the cutter bar being raised off the ground.
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公开(公告)号：US20180139899A1
公开(公告)日：2018-05-24
申请号：US15817417
申请日：2017-11-20
发明人： Bruce Robert Shearer
摘要： A crop harvesting header having a frame mounted on a propulsion vehicle has a cutter bar carrying a sickle knife and a draper transport. The draper is guided at its front edge by a longitudinally extending rail mounted on the frame for movement therewith. The cutter bar is mounted on the frame at spaced positions by spring blades attached to a fixed beam at the rear which allow up and down flexing movement of the cutter bar relative to the draper engagement member. At the center discharge the cutter bar is carried on shorter blades which are carried on a beam in front of the front draper roller. The small amount of flexing of the cutter bar combines with a balanced three piece header frame to provide effective ground following.
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公开(公告)号：US09968033B2
公开(公告)日：2018-05-15
申请号：US15188468
申请日：2016-06-21
IPC分类号： A01D41/127 , A01D41/14 , A01B63/00 , A01B63/10 , F15B11/08 , F15B13/04 , F15B13/044
CPC分类号： A01D41/127 , A01B63/008 , A01B63/10 , A01D41/141 , F15B11/08 , F15B13/0401 , F15B13/044 , F15B2211/426 , F15B2211/526
摘要： In a crop harvesting machine there is provided a pair of hydraulic float cylinders for a header relative to a vehicle, 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. 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.
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