Control unit for a hydraulic operating system, in particular a double driving brake valve

摘要

The invention relates to a control unit for a hydraulic drive system, in particular a double driving brake valve, having a control valve (34), the first connection (34a) of which is connected via respective non-return valves (36, 38) to two working lines (20, 21) and the second (34b) and third (34c) connections of which are connected to respective connections (32b, 32a) of a hydraulic motor (32) and respective working lines (20, 21), the control valve in the state of rest occupying a central position (M2) and being moved into a forward position (V2) or a rearward position (R2) as a function of the direction of the fluid flow in the working lines (20, 21), and the return of the control valve (34) to the central position taking place in damped fashion. According to the invention, one or both connections (32a, 32b) of the hydraulic motor are connected via respective reversing valves (40; 42) to respective working lines (20; 21) and the associated second or third connection of the switching valve (34), the reversing valve (40, 42), in the case of a flow direction of the fluid in the associated working line (20, 21) in the direction of the hydraulic motor (32), connecting the working line (20, 21) to the hydraulic motor (32) and separating the associated second or third connection of the control valve (34) from the related connection of the motor (32) and, in the case of reversed flow direction of the fluid, ... the second or third connection of the control valve (34) to the related connection of the motor (32) ... Original abstract incomplete. <IMAGE>