Combined service brake and spring brake cylinder with service brake cylinder mounted inside the spring brake cylinder

A combined service brake and spring brake cylinder for operating a service brake and a parking brake, comprising:

• a spring brake cylinder including
• a spring brake cylinder housing,
• a spring brake piston, and
• at least one accumulator spring loading the spring brake piston in a direction of application of the parking brake, wherein the spring brake piston is displaceably guided on a radially inner circumferential surface of the spring brake cylinder housing, and the spring brake piston and the spring brake cylinder housing delimit a spring brake chamber which can be pressurized by a parking brake pressure;
• a separate service brake cylinder;
• and
• a service brake piston, at least the service brake piston delimiting a service brake chamber which can be pressurized with a service brake pressure, wherein the service brake cylinder, viewed radially, is arranged inside the spring brake cylinder housing, wherein the service brake piston is connected to a service brake piston rod, wherein the service brake cylinder is pot-shaped and has a cylindrical wall part extending in parallel into the spring brake cylinder housing and a bottom part proximate to the spring brake piston and further connected with the cylindrical wall part, wherein the service brake piston is displaceably guided directly on the radially inner circumferential surface of the cylindrical wall part of the service brake cylinder, and wherein the bottom part of the service brake cylinder is provided with a central opening through which the service brake piston rod projects.

A combined service brake and spring brake cylinder for operating a service brake and a parking brake, comprising:

• a spring brake cylinder including
• a spring brake cylinder housing,
• a spring brake piston and
• at least one accumulator spring loading the spring brake piston in a direction of application of the parking brake, wherein the spring brake piston is displaceably guided on a radially inner circumferential surface of the spring brake cylinder housing, and the spring brake piston and the spring brake cylinder housing delimit a spring brake chamber which can be pressurized by a parking brake pressure;
• a separate service brake cylinder;
• and
• a service brake piston, at least the service brake piston delimiting a service brake chamber which can be pressurized with a service brake pressure, wherein the service brake cylinder, viewed radially, is arranged inside the spring brake cylinder housing, wherein the service brake piston is connected to a service brake piston rod, characterized in that that the service brake cylinder is pot-shaped and has a cylindrical wall part extending in parallel into the spring brake cylinder housing and a bottom part proximate to the service brake piston connected with the cylindrical wall part, the service brake piston is displaceably guided directly on the radially inner circumferential surface of the cylindrical wall part of the service brake cylinder, and where the bottom part of the service brake cylinder forms a at least one of a bottom and a cover of the spring brake cylinder housing.