The reducer includes a screw, threaded internal rollers, and a tapped internal casing. The internal rollers each being in mesh firstly with the screw and secondly with the internal casing by means of at least one thread of opposite hand to a thread of the screw and of the same hand as a thread of the internal casing. The reducer further includes a tapped external casing and external rollers each in mesh firstly with the internal casing and secondly with the external casing. The external rollers are provided with at least one thread of opposite hand to a thread of the internal casing and of the same hand as a thread of the external casing.

Disclosed herein a hydraulic pressure supply apparatus of an electronic brake system includes a motor coupled to a modulator block having a flow path and a valve for adjusting braking hydraulic pressure therein, the motor having a stator and a rotor disposed to be spaced apart from an inner circumferential surface of the stator; a first gear configured to receive a rotational force from the rotor and rotating together with the rotor; a second gear provided with a piston on one side thereof and concentrically connected with the first gear in a ball screw manner to convert a rotational motion of the first gear into a linear motion; and an anti-rotation unit configured to prevent the second gear from rotating together with the first gear.

The vehicle brake actuator which includes a screw, a tapped inner casing in mesh with the screw by means of an irreversible connection, an electric motor controlling movement of the screw in relation to the inner casing or of the inner casing in relation to the screw so that said movement actuates a braking element, threaded inner rollers, the inner rollers each being in mesh firstly with the screw and secondly with the inner casing by means of at least one thread, a tapped outer casing, and outer rollers each in mesh firstly with the inner casing and secondly with the outer casing, the outer rollers having at least one thread oriented in the opposite direction to a thread of the inner casing and in the same direction as a thread of the outer casing.

The reducer includes a screw, threaded internal rollers, and a tapped internal casing. The internal rollers each being in mesh firstly with the screw and secondly with the internal casing by means of at least one thread of opposite hand to a thread of the screw and of the same hand as a thread of the internal casing. The reducer further includes a tapped external casing and external rollers each in mesh firstly with the internal casing and secondly with the external casing. The external rollers are provided with at least one thread of opposite hand to a thread of the internal casing and of the same hand as a thread of the external casing.

Disclosed herein a hydraulic pressure supply apparatus of an electronic brake system includes a motor coupled to a modulator block having a flow path and a valve for adjusting braking hydraulic pressure therein, the motor having a stator and a rotor disposed to be spaced apart from an inner circumferential surface of the stator; a first gear configured to receive a rotational force from the rotor and rotating together with the rotor; a second gear provided with a piston on one side thereof and concentrically connected with the first gear in a ball screw manner to convert a rotational motion of the first gear into a linear motion; and an anti-rotation unit configured to prevent the second gear from rotating together with the first gear.

The invention relates to a motor vehicle brake, in particular a motor vehicle brake that can be actuated in a combined hydraulic and electromechanical manner, having an actuator assembly comprising: a housing, an actuating element that can be displaced relative to the housing along a longitudinal axis for the hydraulic or electromechanical displacement of a brake lining, a motor drive, and a displacement mechanism, arranged between the motor drive and the displaceable actuating element, for displacing the actuating element. The displacement mechanism has a multi-stage spindle-nut arrangement comprising a first spindle-nut pair having a first thread pitch and a second spindle-nut pair having a second thread pitch, wherein the first thread pitch is greater than the second thread pitch, wherein, during an electromechanical actuation of the motor vehicle brake, the first spindle-nut pair is active in a first actuating phase and the second spindle-nut pair is active in a second actuating phase.

An electro-hydraulic actuator (1) for actuating a brake (2) with a hydraulic thrust unit comprises an electric motor (3), a converting mechanism (5) to convert a rotational motion of the motor (4) into a translational motion, a cylinder (8), and a piston (9) connected to the converting mechanism, wherein the converting mechanism (5) is configured so that, for a given angular speed of the drive shaft (4), the translation speed of the piston (9) decreases from a maximum value in a rear length (14) of the piston stroke to a minimum value in a front length (13) of the piston stroke.

The vehicle brake actuator which includes a screw, a tapped inner casing in mesh with the screw by means of an irreversible connection, an electric motor controlling movement of the screw in relation to the inner casing or of the inner casing in relation to the screw so that said movement actuates a braking element, threaded inner rollers, the inner rollers each being in mesh firstly with the screw and secondly with the inner casing by means of at least one thread, a tapped outer casing, and outer rollers each in mesh firstly with the inner casing and secondly with the outer casing, the outer rollers having at least one thread oriented in the opposite direction to a thread of the inner casing and in the same direction as a thread of the outer casing.