Hydraulic cylinder control system for earth-moving machine working tools

摘要

The bucket is activated by a hydraulic cylinder (140) for lifting and another cylinder (145) for tipping. Pressure sensors (230,235) supply signals corresp. to the pressures in the hydraulic cylinders and logic units (250) receive these pressure signals and subject them to a comparison process with a series of setting values or points, producing finally the appropriate lifting or tilting commands. Actuating units (270,275) receive these, lifting the bucket through the material and tilting the bucket so that the material can be received.