Hydraulic control device for digger or excavator has control block controlling switching valve in filling line and controlled valve in bypass line damping movement of hydraulic cylinders

摘要

The control device has a control block (20) or controlling the pressure medium flow between the hydraulic cylinders (10) for the tool (12), a pressure supply (P) and a tank (T) with at least one hydraulic reservoir (22). The filling line (24) has a switching valve (26) controlled by the control block, a bypass line (30) containing a controlled valve (34), used for damping the movement of the hydraulic cylinders.