HYDRAULIC SYSTEM FOR TRACTOR HITCH Russian patent published in 2004 - IPC

FIELD: agricultural engineering.

SUBSTANCE: hydraulic system includes hydraulic controlled slide distributor with at least one distributing working section, said slide distributor and working section being connected via hydraulic pipelines to pump and tank. Distributing working section is provided with inlet and outlet pressure channels, which are connected with one another in neutral position of slide valve, channels for supplying to and discharging from consumer of working fluid, said channels being embraced with drain channel. Hydraulic system includes hitch position regulator comprising priority valve and setting slide sleeve with slide valve arranged inside sleeve and providing feedback with hitch. Setting sleeve and feedback slide valve are provided with bores defining control channel for priority valve and controlled bypass valve. The latter is mounted in hydraulic slide distributor between outlet channel of distributing working section, which is the last section positioned downstream of working fluid flow, and its drain channel. Bypass valve control cavity is communicated with outlet channel via main spray nozzle and return valve of additional spray nozzle.

EFFECT: wider operational capabilities and provision for creation of unified hydraulic system.

3 cl, 2 dwg