Door actuator
A door operator for operating a door includes a housing, an output shaft with a cam disc, an opening piston guided in the housing, which piston, on a first side, bears against the cam disc, an energy accumulator acting upon the opening piston for storing a closing energy for the door, and a damping piston guided in a cylindrically shaped hollow space of a cylinder element, and which piston, on a second side, bears against the cam disc, wherein the cylinder element is firmly connected to the opening piston.
1. A door operator ( 1 ) for operating a door, comprising:
a housing ( 2 );
an output shaft ( 3 ) having a cam disc ( 6 );
a cylinder element ( 8 ), an exterior surface of the cylinder element ( 8 ) bearing against the housing ( 2 );
an opening piston ( 7 ), guided in the housing ( 2 ), the opening piston ( 7 ), on a first side, bearing against the cam disc ( 6 );
an energy accumulator ( 10 ) configured to act upon the opening piston ( 7 ) to accumulate a closing energy for the door;
a damping piston ( 16 ) guided in a cylindrically shaped hollow space ( 15 ) of the cylinder element ( 8 ), the damping piston bearing against the cam disc ( 6 ) on a second side; and
a compression spring ( 19 ) arranged between a side of the damping piston ( 16 ) facing away from the cam disc ( 6 ) and the housing ( 2 ),
wherein the cylinder element ( 8 ) is firmly connected to the opening piston ( 7 ).
2. The door operator according to claim 1 , wherein the energy accumulator ( 10 ) comprises at least one closer spring.
3. The door operator according to claim 1 , wherein the opening piston ( 7 ) comprises a first pressure roller ( 12 ) bearing against the cam disc ( 6 ).
4. The door operator according to claim 1 , wherein the damping piston ( 16 ) comprises a second pressure roller ( 14 ) bearing against the cam disc ( 6 ).
5. The door operator according to claim 1 , wherein the exterior surface of the cylinder element ( 8 ) is guided in the housing ( 2 ).
6. The door operator according to claim 1 , wherein the cylinder element ( 8 ) and the opening piston ( 7 ) together are integrally manufactured.
7. The door operator according to claim 1 , further comprising a non-return valve ( 20 ) in the damping piston ( 16 ).
8. A door operator ( 1 ) for operating a door, comprising:
a housing ( 2 );
an output shaft ( 3 ) having a cam disc ( 6 );
a cylinder element ( 8 ), an exterior surface of the cylinder element ( 8 ) bearing against the housing ( 2 );
an opening piston ( 7 ), guided in the housing ( 2 ), the opening piston ( 7 ), on a first side, bearing against the cam disc ( 6 );
an energy accumulator ( 10 ) configured to act upon the opening piston ( 7 ) to accumulate a closing energy for the door; and
a damping piston ( 16 ) guided in a cylindrically shaped hollow space ( 15 ) of the cylinder element ( 8 ), the damping piston bearing against the cam disc ( 6 ) on a second side,
wherein the cylinder element ( 8 ) is firmly connected to the opening piston ( 7 ), and
wherein the output shaft ( 3 ) and the cam disc ( 6 ) are disposed between the opening piston ( 7 ) and the cylinder element ( 8 ).
9. A door operator ( 1 ) for operating a door, comprising:
a housing ( 2 );
an output shaft ( 3 ) having a cam disc ( 6 );
a cylinder element ( 8 ), an exterior surface of the cylinder element ( 8 ) bearing against the housing ( 2 );
an opening piston ( 7 ), guided in the housing ( 2 ), the opening piston ( 7 ), on a first side, bearing against the cam disc ( 6 );
an energy accumulator ( 10 ) configured to act upon the opening piston ( 7 ) to accumulate a closing energy for the door;
a damping piston ( 16 ) guided in a cylindrically shaped hollow space ( 15 ) of the cylinder element ( 8 ), the damping piston bearing against the cam disc ( 6 ) on a second side; and
two or four webs ( 9 ) arranged between the opening piston ( 7 ) and the cylinder element ( 8 ) to connect the opening piston ( 7 ) to the cylinder element ( 8 ),
wherein the cylinder element ( 8 ) is firmly connected to the opening piston ( 7 ).