Door actuator with an actuator unit

1. A door operator comprising:

a drive unit having a gear with a gear housing, the gear housing comprising:

a flange element having a guide section, the guide section configured for at least one of bearing and supporting a gear member of a motor, the motor is mountable to the gear housing via the flange element;

at least one first shell element;

at least one second shell element configured to form:

(a) an inner gear compartment when the first and the second shell elements are brought into mutual abutment, and

(b) a reception tunnel in which the flange element is received via the guide section in a groove guide provided in the reception tunnel;

at least one projection at a side of the guide section, the at least one projection facing one of the first and the second shell elements;

at least one insert opening arranged in at least one of the first and the second shell elements corresponding to the at least one projection such that, when the at least one of the first and the second shell elements is placed onto the guide section, the at least one projection engages in the at least one insert opening; and

a spring force accumulator received in a reception surface of the gear housing via a liner plate having a central opening, the liner plate being disposed between the spring force accumulator and the reception surface, wherein the reception surface is formed by the first and the second shell elements in the joined condition.

2. The door operator according to claim 1 , wherein the first and the second shell elements are selected from the group consisting of a metallic cast component, a metallic die-cast component, and a plastic material injection moulded component.

3. The door operator according to claim 1 , wherein the first and the second shell elements further comprise a plurality of respectively associated fastening mouldings by which the first and the second shell elements are interconnectable by screw elements.

4. The door operator according to claim 3 , wherein at least one of the plural respectively associated fastening mouldings forms a moulding projection configured for a defined at least one of guiding and affixing at least one electrical line at the gear housing.

5. The door operator according to claim 4 , wherein the moulding projection has a threaded bore, into which a screw element is screwed from a side of the at least one of the shell elements facing away from the guide section, while passing through the insert recess.

6. The door operator according to claim 1 , wherein the liner plate is provided in a flat abutment of the reception surface.

7. The door operator according to claim 6 , wherein a ring-shaped collar projects from the reception surface, the ring-shaped collar comprising respective collar sections of the first and the second shell elements, the ring-shaped collar configured to receive the liner plate in a centering manner in that the collar is configured to be inserted into a centering opening provided in the liner plate.

8. The door operator according to claim 6 , wherein

the liner plate is screwed to the shell elements.

9. The door operator according to claim 1 , wherein the first and the second shell elements have respective plane surface areas configured at the upper side, which, when the first and the second shell elements are brought into mutual abutment, extend in a common planar surface.

10. The door operator according to claim 1 , further comprising an incremental encoder disposed at the outside of the first and the second shell elements.

11. The door operator according to claim 10 , wherein a shaft passage is provided in the one of the first and the second shell elements receiving the incremental encoder, through which passage a transmission shaft extends, to cooperate with the incremental encoder.

12. The door operator according to claim 1 , further comprising a radio set disposed at the outside of the first and the second shell elements.

13. The door operator according to claim 9 , further comprising at least one system carrier having a flat cable guide configured together with the plane surface for guiding a flat cable.

14. The door operator according to claim 1 , wherein the gear housing is provided with a plurality of reinforcing ribs.

15. The door operator according to claim 6 , wherein the spring force accumulator has at least one insert projection that is inserted into at least one associated insert recess in the first and the second shell elements.