Ground working implements and wing fold mechanisms therefore

Details Ground working implements and wing fold mechanisms therefore Ground working implements and wing fold mechanisms therefore

A - Human Necessities

01

B

97/128

A01B 73/00 (2006.01) A01B 73/04 (2006.01)

Patent

CA 1197130

"GROUND WORKING IMPLEMENTS AND WING FOLD MECHANISM THEREFORE" ABSTRACT OF THE DISCLOSURE Conventionally, double fold mechanism for sections of ground working implements such as cultivators, plows or the like utilize a hydraulic piston and cylinder assembly to lift one wing section to approximately 90° , and then to lower it over the other center or wing section so that it lies either at an angle to the horizontal or substantially horizontally above the center or other section. Also re- quired is freedom of the wing sections to "float" during field use to allow for uneven ground. This "float" is usual- ly provided for by means of a slotted link connection be- ween the two sections but this slotted link connection allows a period of free fall as the elevating section passes over top dead center or through the center of gravity, when moving in either direction, thus causing relatively high impact loads to the linkage and supporting structure because of the weight of the moving section. The present device utilizes a slotted linkage but also includes a spring load- ed pin within the slots of the links. As the section is moving towards the substantially vertical or top dead center position, the spring forces the pin to the far end of the slot just prior to the wing section passing over top dead center and this takes up the free movement and prevents any free fall from occurring. The spring loaded pin and slots also allow a cushioned floating action when the implement -23- is in the field working position.

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