Header lift system with hydraulic counterweight
First Claim
Patent Images
1. A harvesting machine comprising:
- a frame adapted for movement over the ground, the frame having a front end, an opposing rear end, and an operator platform;
an elongate crop harvesting header having a first end and a second opposing end, the first and second ends defining the length of the elongate header, the header supported at first and second support points, intermediate the first and second ends, by the frame across the front end of the frame for generally vertical movement relative to the ground; and
a header lift and flotation system interconnecting the header and the frame for selectively raising and lowering the header relative to the ground and setting flotation parameters, the header lift and flotation system including left and right hand hydraulic cylinders interconnecting the frame and the header adjacent the respective first and second support points;
a hydraulic fluid reservoir;
an electro-hydraulic circuit;
a manually manipulable switch; and
an electronic programmable controller,the electro-hydraulic circuit including valves operated by electrical signals that interconnect the hydraulic fluid reservoir and the respective left and right hand hydraulic cylinders, and the electronic programmable controller interconnecting the switch and the valves such that manipulation of the switch causes the controller to emit electrical signals to the valves to establish flotation and lift settings for the valves,wherein the electronic programmable controller controls the valves of the electro-hydraulic circuit to apply hydraulic pressure to one of the left and right hand hydraulic cylinders, thereby applying a hydraulic counterweight.
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Abstract
A hydraulic lift/flotation system for the header of a crop harvesting machine wherein each side of the header is supported by a single cylinder, which performs both the flotation and lift functions. To accommodate unbalanced headers (center of gravity not centered between the lift arms), hydraulic oil is sent to the return side of the lift cylinder on the lighter side of the header, thus resulting in even raising, lowering and float.
80 Citations
21 Claims
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1. A harvesting machine comprising:
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a frame adapted for movement over the ground, the frame having a front end, an opposing rear end, and an operator platform; an elongate crop harvesting header having a first end and a second opposing end, the first and second ends defining the length of the elongate header, the header supported at first and second support points, intermediate the first and second ends, by the frame across the front end of the frame for generally vertical movement relative to the ground; and a header lift and flotation system interconnecting the header and the frame for selectively raising and lowering the header relative to the ground and setting flotation parameters, the header lift and flotation system including left and right hand hydraulic cylinders interconnecting the frame and the header adjacent the respective first and second support points;
a hydraulic fluid reservoir;
an electro-hydraulic circuit;
a manually manipulable switch; and
an electronic programmable controller,the electro-hydraulic circuit including valves operated by electrical signals that interconnect the hydraulic fluid reservoir and the respective left and right hand hydraulic cylinders, and the electronic programmable controller interconnecting the switch and the valves such that manipulation of the switch causes the controller to emit electrical signals to the valves to establish flotation and lift settings for the valves, wherein the electronic programmable controller controls the valves of the electro-hydraulic circuit to apply hydraulic pressure to one of the left and right hand hydraulic cylinders, thereby applying a hydraulic counterweight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a harvesting machine having a frame adapted for movement over the ground, the frame having a front end, an opposing rear end, and an operator'"'"'s platform, an elongate crop harvesting header having a first end and a second opposing end, the first and second ends defining the length of the elongate header, the header supported at first and second support points, intermediate the first and second ends, by the frame across the front end of the frame for generally vertical movement relative to the ground, the improvement comprising:
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a header lift and flotation system interconnecting the header and the frame for selectively raising and lowering the header relative to the ground and setting flotation parameters, the header lift and flotation system including; left and right hand hydraulic cylinders interconnecting the frame and the header adjacent the respective first and second support points; a hydraulic fluid reservoir; substantially independent left and right hand electro-hydraulic circuits, including valves operated by electrical signals, interconnecting the hydraulic fluid reservoir and the respective left and right hand hydraulic cylinders; left and right hand manually manipulated switches; an electronic programmable controller interconnecting the switches and the valves such that independent manipulation of the switches causes the controller to emit electrical signals to the valves to establish independent flotation and lift settings for the left and right hand hydraulic cylinders. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A crop harvesting machine comprising:
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a self-propelled frame adapted for movement over the ground, the frame having a front end, an opposing rear end; an operator'"'"'s platform affixed to and supported by the frame; an elongate crop harvesting header having a first end and a second opposing end, the first and second ends defining the length of the elongate header, the header supported at first and second support points, intermediate the first and second ends, by the frame across the front end of the frame for generally vertical movement relative to the ground; a header lift and flotation system interconnecting the header and the frame for selectively raising and lowering the header relative to the ground and setting flotation parameters, the header lift and flotation system including; left and right hand hydraulic cylinders interconnecting the frame and the header adjacent the respective first and second support points; a hydraulic fluid reservoir; an electro-hydraulic circuit, including valves operated by electrical signals, interconnecting the hydraulic fluid reservoir and the respective left and right hand hydraulic cylinders; the left and right hand hydraulic cylinders are hydraulically connected such that hydraulic oil is sent to the return side of the respective cylinder on the lighter side of the header; a manually manipulated switch; and an electronic programmable controller interconnecting the switch and the valves such that manipulation of the switch causes the controller to emit electrical signals to the valves to establish flotation and lift settings for the left and right hand hydraulic cylinders. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification