Coupling device for producing a non-permanent hydraulic connection

A tool holder comprising a housing, a spindle, a centering receptacle arranged in the spindle for receiving an adapter, and a clamping system actuated by a fluid for clamping and detaching the adapter in the centering receptacle,

• wherein at least one first coupling part is present in the spindle,
• wherein at least one second coupling part is present in the housing,
• wherein the at least one first coupling part and the at least one second coupling part are suitable for working together to form a coupling device for a fluid,
• wherein the at least one first coupling part is formed as a spring-loaded, double check valve,
• wherein the at least one second coupling part comprises an actuator piston guided displaceably in the housing, and
• wherein an outwardly opening directional valve is arranged in the actuator piston, characterized in that
• the actuator piston is designed as a stepped piston,
• in that a first part of the actuator piston delimits a first cylinder chamber
• in that a second part of the actuator piston delimits a second cylinder chamber, and
• in that a diameter of the first part of the actuator piston is smaller than a diameter of the second part of the actuator piston, such that a third cylinder chamber with an annular surface is present at the transition between the first part and the second part of the actuator piston.

A tool holder comprising a housing, a spindle, a centering receptacle arranged in the spindle for receiving an adapter, and a clamping system actuated by a fluid for clamping and detaching the adapter in the centering receptacle,

• wherein at least one first coupling part is present in the spindle,
• wherein at least one second coupling part is present in the housing,
• wherein the first coupling part and the second coupling part are suitable for working together to form a coupling device for a fluid,
• wherein the first coupling part is designed as a spring-loaded, double check valve, wherein the second coupling part comprises an actuator piston guided displaceably in the housing, wherein an outwardly opening directional valve is arranged in the actuator piston,
• characterized in that the first coupling part has a shoulder on an end of the first coupling part, the shoulder facing the second coupling part, which dips into a guide bore of the second coupling part when the coupling device is closed, wherein a fluid chamber of the second coupling part opens into the guide bore, wherein a sleeve-shaped valve seat of the directional valve is accommodated displaceably in the guide bore, and wherein a valve tappet of the directional valve is connected to the actuator piston and projects through the sleeve-shaped valve seat of the directional valve.

A supply bracket comprising at least one second coupling part which is suitable for working together with a first coupling part to form a coupling device for a fluid,

• wherein the first coupling part is formed as a spring-loaded, double check valve,
• wherein the second coupling part comprises an actuator piston guided displaceably in a housing,
• wherein an outwardly opening directional valve is arranged in the actuator piston,
• wherein the actuator piston divides a cylinder bore into a first cylinder chamber and a second cylinder chamber,
• wherein the supply bracket comprises a C-shaped docking portion, and
• wherein at least two of the second coupling parts are arranged on the docking portion.

A supply bracket comprising at least one second coupling part which is suitable for working together with a first coupling part to form a coupling device for a fluid,

• wherein the first coupling part is formed as a spring-loaded, double check valve,
• wherein the at least one second coupling part comprises an actuator piston guided displaceably in a housing, and
• wherein an outwardly opening directional valve is arranged in the actuator piston,
• wherein the actuator piston is designed as a stepped piston,
• wherein a first part of the actuator piston delimits a first cylinder chamber,
• wherein a second part of the actuator piston delimits a second cylinder chamber, and
• in that a diameter of the first part of the actuator piston is smaller than a diameter of the second part of the actuator piston, such that a third cylinder chamber with an annular surface is present at the transition between the first part and the second part of the actuator piston,
• wherein the supply bracket comprises a C-shaped docking portion, and
• wherein at least two of the second coupling parts are arranged on the docking portion.

A rotary machine, comprising at least one tool holder comprising a housing, a spindle, a centering receptacle arranged in the spindle for receiving an adapter, and a clamping system actuated by a fluid for clamping and detaching the adapter in the centering receptacle, wherein at least one first coupling part is present in the spindle,

• wherein at least one second coupling part is present in the housing,
• wherein the first coupling part and the second coupling part are suitable for working together to form a coupling device for a fluid,
• wherein the first coupling part is formed as a spring-loaded, double check valve,
• wherein the second coupling part comprises an actuator piston guided displaceably in the housing, and
• wherein an outwardly opening directional valve is arranged in the actuator piston,
• wherein the actuator piston divides a cylinder bore into a first cylinder chamber and a second cylinder chamber in that the fluidic actuation of the clamping system comprises a cylinder structure, and in that the at least one first coupling part for the supply of the cylinder structure is provided for clamping and releasing the clamping system.