Brake actuator and vehicle brake

Brake actuator (12) for an electromechanical vehicle brake,

• having an electric motor for activating the vehicle brake,
• a blocking module for selectively rotationally blocking an output shaft of the electric motor so as to configure a parking brake function,
• wherein the blocking module comprises a blocking lever which is mounted so as to be pivotable between a locking position and a releasing position, and a blocking actuator for pivoting the blocking lever,
• wherein configured on the blocking lever is a blocking tooth which in the locking position of the blocking lever engages with a gear wheel coupled to the output shaft of the electric motor,
• wherein the blocking tooth on one tooth flank has a blocking geometry, and on an opposite tooth flank has a lifting geometry, said geometries being configured in such a manner that in a rotation of the electric motor in a first direction that boosts a braking force, the blocking lever by the rotation of the electric motor is lifted counter to a spring force so as to disengage from the gear wheel, and a rotation of the electric motor in an opposite direction that releases the braking force is blocked, wherein a spring (52) for applying a pre-loading force in the direction of the locking position is integrated in a bearing point of the blocking lever.

Brake actuator (12) for an electromechanical vehicle brake,

• having an electric motor for activating the vehicle brake,
• a blocking module for selectively rotationally blocking an output shaft of the electric motor so as to configure a parking brake function,
• wherein the blocking module comprises a blocking lever which is mounted so as to be pivotable between a locking position and a releasing position, and a blocking actuator for pivoting the blocking lever,
• wherein configured on the blocking lever is a blocking tooth which in the locking position of the blocking lever engages with a gear wheel coupled to the output shaft of the electric motor,
• wherein the blocking tooth on one tooth flank has a blocking geometry, and on an opposite tooth flank has a lifting geometry, said geometries being configured in such a manner that in a rotation of the electric motor in a first direction that boosts a braking force, the blocking lever by the rotation of the electric motor is lifted counter to a spring force so as to disengage from the gear wheel, and a rotation of the electric motor in an opposite direction that releases the braking force is blocked, wherein the blocking actuator has a linearly displaceable tappet which is coupled to the blocking lever at a coupling location, wherein a spring is integrated in the coupling location in such a manner that the blocking lever is resiliently mounted relative to the blocking actuator.