AGRICULTURAL MACHINE HYDRAULIC SYSTEM Russian patent published in 1997 - IPC

FIELD: agricultural engineering; forage harvesters ganged up with tractor. SUBSTANCE: to improve reliability of harvester by preventing displacement of hydraulic cylinder rod from operating position after completion of displacement and at operation of other hydraulic cylinders of agricultural machine, differential system is used in hydraulic system of machine consisting of sectional hydraulic distributor 11 hydraulically coupled with working member hydraulic cylinders 1, 2, 3, hydraulic pump 16 and hydraulic reservoir 17. Differential system connects spaces of hydraulic cylinder providing displacement of one working member, mainly, reverse mechanism change-over hydraulic cylinder, with outputs of two sections of sectional hydraulic distributor. Thanks to it one space of this hydraulic cylinder is connected with output of one section, and other space, with output of second section, both spaces being placed in communication by hydraulic line 19, with restrictor placed in this line. EFFECT: improved reliability of operation. 4 cl, 2 dwg