Implement with reduced hydraulic oil exchange

摘要

A folding implement frame having seven sections in a use position and nine sections when folded. The frame design allows a frame having a width of greater than 27 meters to be folded into a transport position having a width of less than eight meters and a height of less than six meters. The hydraulic system transfers weight to the center frame section during folding and unfolding to enhance stability. The hydraulic system uses accumulators to minimize the amount of oil reduction in the tractor reservoir resulting from extension of the hydraulic cylinders of the implement. Implement raise and lower cycle times are minimized by a helper cylinder to lift the frame main section when the entire implement weight is on the main section and allowing a smaller cylinder to lift the frame main section in the use position for shorter cycle times to raise and lower the implement.

主权项

1. An implement hydraulic system adapted to be selectively coupled to a prime mover hydraulic system, the prime mover hydraulic system including a pump, a reservoir and connectors to connect to an implement hydraulic system, the implement hydraulic system comprising:
a plurality of active hydraulic cylinders each having an extendable rod; a hydraulic circuit controlling the flow of oil to and from the active cylinders to operate the cylinders; connectors to connect the implement hydraulic circuit to the prime mover hydraulic system; at least one accumulator adapted to receive and hold oil from the prime mover hydraulic system when the active cylinders are operated to retract the rods and to release oil back to the prime mover hydraulic system when the implement hydraulic system is operated to extend the rods of the active cylinders.