HYDRAULIC DRIVE OF AUTOMATED MACHINE MECHANISM Russian patent published in 1999 - IPC

FIELD: manufacture of machines and equipment with automatic cycle of operation, for instance, automatic weighing machines, automatic machines for manufacture of capping, sewing machines, more specifically, hydraulic drives of separate mechanisms of automated machines with driving link of mechanism in form of single-section or two-section rotary hydraulic pump. SUBSTANCE: hydraulic pump rotor is rigidly connected with machine main shaft. made on rotor is curved surface with radius varying in compliance with preset law of speed variation of driven working link. Said surface forms pressure working hollow of varying cross-section between chamber walls and rotor. Installed in guide groove of chamber wall is one spring-loaded blade for two-section chamber or two spring-loaded blades. Said blades are moved in direction towards curved surface for closing the cross-section of pressure working hollow. Rotor surface has one or two overflow distributing grooves communicated by means of channel with replenishing vessel and having local connector with throttling slot of calculated varying cross-section. Rotor curved surface has overload-preventing groove whose width is smaller than that of blade. EFFECT: prevented malfunctions in execution of programmed cycle of motion of driven working link and eliminated inertial overshooting of driven link at uncontrolled speed on braking part of its path. 2 cl, 8 dwg