Control device for the continuous drive of a hydraulic control motor

A control device for a hydraulic control motor, comprising:

• two structurally identical pairs of throttle devices, each pair including two throttle devices, each throttle device including an axially movable piston, a first throttle device of each pair of throttle devices configured to be controlled in accordance with a throttle needle in a throttle opening, the piston of the first throttle device and a stop face arranged to form a first pressure chamber in a housing bore, a piston of a second throttle device and a housing of the second throttle device arranged to form an additional pressure chamber in hydraulic communication with the first pressure chamber via a line, a throttle device of each pair of throttle devices including a precontrol bore extending from one end face to another end face of the piston and positioned so that a bore opening facing an inflow duct is opened in every piston position and so that another bore opening is closed if the piston is moved against the stop face.

A control device for a hydraulic control motor, comprising:

• two structurally identical pairs of throttle devices, each pair including two throttle devices, each throttle device including an axially movable piston, a first throttle device of each pair of throttle devices configured to be controlled in accordance with a throttle needle in a throttle opening, the piston of the first throttle device and a stop face arranged to form a first pressure chamber in a housing bore, a piston of a second throttle device and a housing of the second throttle device arranged to form an additional pressure chamber in hydraulic communication with the first pressure chamber via a line, a throttle device of each pair of throttle devices including a precontrol bore extending from one end face to another end face of the piston and positioned so that a bore opening facing an inflow duct is opened in every piston position and so than another bore opening is closed if the piston is moved against the stop face,
• wherein the stop face is arranged as part of a cover for the housing bore.

A control device, for a hydraulic control motor, comprising:

• two structurally identical pairs of throttle devices, each pair including two throttle devices, each throttle device including an axially movable piston, a first throttle device of each pair of throttle devices configured to be controlled in accordance with a throttle needle in a throttle opening, the piston of the first throttle device and a stop face arranged to form a first pressure chamber in a housing bore, a piston of a second throttle device and a housing of the second throttle device arranged to form an additional pressure chamber in hydraulic communication with the first pressure chamber via a line, a throttle device of each pair of throttle devices including a precontrol bore extending from one end face to another end face of the piston and positioned so that a bore opening facing an inflow duct is opened in every piston position and so than another bore opening is closed if the piston is moved against the stop face,
• wherein the stop face is arranged as part of a disk, the throttle opening arranged in the disk.