RU93003307A - HYDRAULIC DRIVE OF LOADING UNIT - Google Patents

Claims (1)

The hydraulic line refers to the management of the working bodies of lifting devices and can be used, for example, in the forest industry in hydraulic manipulators for feeding timber to woodworking machines. The hydraulic actuator contains a power source, hydraulic cylinders for boom rotation, in which the cavities loaded with gravitational forces from the mass of working equipment and the cargo being processed are communicated with each other using a pipeline in which a normally open valve is installed, kinematically connected with the spool of the separate boom control valve, the spool joint control valve, the working outputs of which are connected to the cavities of the hydraulic cylinders, and the valve is additionally equipped with a section having hydraulic line connecting the working outputs with each other, while the areas of the pistons of the hydraulic cylinders are calculated to

when moving the load to the hinge attachment boom or

when moving the load from the boom hinge pivot, where P _{g c} and P _{g p} is the gravitational force from the mass of the working equipment and the cargo being processed, reduced to the rods of the boom swing cylinder and the hydraulic cylinder turning the handle. When communicating the cavities of the hydraulic cylinders among themselves with the help of a spool having a section with hydroline, under the action of the gravitational forces of the cargo being processed, it moves along a straight-line trajectory to the unloading zone. This minimizes energy costs, reduces the installed capacity of the power source.