Park Lock and Pad Wear Adjusting Arrangement for Electrically Actuated Brake

An electrically actuated brake assembly comprising:

• a brake disc in rotational engagement with a wheel of a vehicle;
• a brake pad which frictionally engages said brake disc when an actuator force is applied thereto;
• an electric motor having an output shaft rotatable in both a forward direction and a reverse direction;
• a service brake transmission in operative rotational communication with the output shaft of said electric motor, said service brake transmission causing said brake pad to move toward said brake disc and exert the actuator force thereon when the output shaft is rotated in the forward direction and causing said brake pad to move away from said brake disc and remove the actuator force therefrom when the output shaft is rotated in the reverse direction;
• at least one adjuster mechanism, said adjuster mechanism being rotatable in one direction to decrease a distance between said brake pad and said brake disc and in another direction to increase the distance between said brake pad and said brake disc;
• and
• an adjuster transmission comprising an electrically actuated clutch operatively connected between the output shaft of said electric motor and said adjuster mechanism, said adjuster transmission causing operative rotational communication between the output shaft of said electric motor and said adjuster mechanism when said adjuster transmission is engaged so as to transmit rotational movement of the output shaft of said electric motor to said adjuster mechanism, and causing there to be no operative rotational communication between the output shaft of said electric motor and said adjuster mechanism when said adjuster transmission is disengaged so as to not transmit rotational movement of the output shaft of said electric motor to said adjuster mechanism;
• and
• wherein said adjuster transmission is employed both to control clearance between said brake pad and said brake disc and as a park lock.