Locking actuator, brake transmission with such a locking actuator and service and/or parking brake

1. A locking actuator ( 2 ) for a brake transmission ( 1 ), comprising:

a driving device ( 5 );

a housing ( 10 );

a transmission ( 20 ) with an axis of rotation (R) and an output; and

a ratchet slide ( 30 ), which is movable in an axis (L) between a first position and a second position along a locking path,

wherein the output is coupled to the ratchet slide ( 30 ) via an eccentric ( 25 ) and can move the ratchet slide ( 30 ) in the axis (L) when the output is rotated.

2. The locking actuator ( 2 ) according to claim 1 , characterized in that the eccentric ( 25 ) engages a guide recess ( 35 ) of the ratchet slide ( 30 ).

3. The locking actuator ( 2 ) according to claim 2 , characterized in that the eccentric ( 25 ) is movable within the guide recess ( 35 ) in a plane perpendicular to the axis of rotation (R) in the guide recess ( 35 ).

4. The locking actuator ( 2 ) according to claim 2 , characterized in that the guide recess ( 35 ) in the axis (L) is dimensioned in such a way that a displacement of the eccentric within the guide recess ( 35 ) is enabled within the order of magnitude of the locking path.

5. The locking actuator ( 2 ) according to claim 2 , characterized in that the guide recess ( 35 ) comprises a gate ( 36 ).

6. The locking actuator ( 2 ) according to claim 5 , characterized in that the gate ( 36 ) has a protrusion ( 37 ), by means of which the ratchet slide ( 30 ) is initially moved in the opposite direction along the locking path between the first position and the second position.

7. The locking actuator ( 2 ) according to claim 1 , characterized in that the ratchet slide ( 30 ) is biased into the second position by means of a spring means ( 40 ).

8. The locking actuator ( 2 ) according to claim 1 , characterized in that the transmission ( 20 ) is a planetary gearset or a cycloidal drive, each with a ring gear ( 26 ).

9. The locking actuator ( 2 ) according to claim 8 , characterized in that the transmission ( 20 ) has a drive gear ( 21 ) and at least one planet gear ( 22 ) which is coupled to the output via a carrier ( 23 ) that can be rotated about the axis of rotation (R).

10. The locking actuator ( 2 ) according to claim 9 , characterized in that the ring gear ( 26 ) is fixed in the housing ( 10 ), and that the driving device ( 5 ) drives the drive gear ( 21 ).

11. The locking actuator ( 2 ) according to claim 1 , characterized in that the output passes through the ratchet slide ( 30 ).

12. The locking actuator ( 2 ) according to claim 1 , characterized in that the ratchet slide ( 30 ) is movably held by a guide ( 12 ) in the axis (L) perpendicular to the axis of rotation (R).

13. The locking actuator ( 2 ) according to claim 12 , characterized in that the guide ( 12 ) of the ratchet slide ( 30 ) is formed by a recess ( 13 ) in the housing ( 10 ).

14. The locking actuator ( 2 ) according to claim 13 , characterized in that the housing ( 10 ) has two housing parts ( 14 , 15 ), which hold the ratchet slide ( 30 ) in the recess ( 13 ) in a form-fitting manner, and that the second housing part ( 15 ) holds the output in the axis of rotation (R).

15. The locking actuator ( 2 ) according to claim 1 , characterized in that two end stops ( 18 , 19 ) are provided, which restrict a rotation of the output or the eccentric ( 25 ) around the axis of rotation (R).

16. The locking actuator ( 2 ) according to claim 1 , characterized in that a sensor is provided, which can detect the position of the ratchet slide ( 30 ), of the output and/or of the eccentric ( 25 ).

17. The locking actuator ( 2 ) according to claim 1 , characterized in that the driving device ( 5 ) comprises a DC motor.

18. A brake transmission ( 1 ) with the locking actuator ( 2 ) according to claim 1 , and a ratchet wheel ( 50 ), which can be rotated in a transmission axle.

19. A service and/or parking brake, in particular a service brake and/or parking brake of a motor vehicle, with the brake transmission ( 1 ) according to claim 18 .