A vehicle steering system comprises: a motor assembly operably coupled to a steering rack, the motor assembly comprising a motor having a rotor and a motor position sensor configured to sense a rotor angle of the motor in a single-turn range; and a rotary-to-linear conversion mechanism operably coupled between the motor assembly and the steering rack, the rotary-to-linear conversion mechanism comprising a rotor operably coupled to the rotor of the motor. A processor calculates an absolute angular position of the pinion in a full-turn range of rotation of the pinion based on the sensed rotor angle of the motor and a pinion angle sensed by a pinion angle sensor in a single-turn range, or based on the sensed rotor angle of the motor and an angle of the rotor of the rotary-to-linear conversion mechanism sensed by an angular position sensor in the single-turn range.

A parking brake apparatus for a vehicle including a motor section receiving electric power from an outside, and generating power; a power transmission section rotated by driving the motor section, and including transmission worm gears; a pair of pressing units receiving power from the power transmission section and pressing a brake pad; and a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit.

A planetary gear speed reducing mechanism installed in a disc brake as a brake device includes a small diameter shaft portion to which rotation from an electric motor is transmitted, and a sun gear to which rotation from the small diameter shaft portion is transmitted. The small diameter shaft portion has outer diameter that is smaller than tip diameter of the sun gear. It is therefore possible to reduce torque loss from the electric motor, for example, during operation of a parking brake, and repress a deterioration in torque transmission efficiency.

Disclosed herein an electric parking brake including a ball-screw type power conversion unit installed in a caliper housing to convert a rotational force into a linear motion, The electric parking brake includes a motor configured to generate a rotational force, a first gear unit including a first connection portion, the first connection portion directly connected to a main helical gear provided on a motor shaft of the motor, a second gear unit including a second connection portion, the second connection portion spaced apart from the first connection portion by a predetermined distance and directly connected to the main helical gear, and a reduction gear unit connected to any one of the first gear unit and the second gear unit and configured to transmit the rotational force generated from the motor to a spindle of the power conversion unit, wherein any one of the first and second gear units is configured to perform a self-locking function when a parking braking force is generated.

A multi-disk brake (1) for a motor vehicle has two multi-disk mechanisms (7, 8) and an actuation device (9) for brake actuation and/or brake release of the multi-disk mechanisms (7, 8), and an electric drive (16) for translational actuation (spreading) of the actuation device, such as, in particular, the ramp unit (9). During a spreading operation, the multi-disk mechanisms (7, 8) are pretensioned in a metered manner by the actuation device and produce a desired frictional engagement, and a correspondingly reversed activation of the actuating mechanism enables a correspondingly metered brake release. By means of the electric drive (16), the action of the multi-disk brake (1) can be metered overall in a particularly precise, sensitive and compensated manner in modern vehicle topology, including all peripheral brake components and systems, including recuperation.

Provided are an electromechanical brake and a vehicle including the same. An electromechanical brake according to an embodiment of the present disclosure includes a first brake pad and a second brake pad configured to respectively press a front surface and a rear surface of a disc and includes a housing having one side to which the first brake pad is coupled, a carrier to which the second brake pad is fixed, the carrier being coupled to the housing so that the second brake pad advance or retreat toward the disc, a hollow motor installed on the housing and configured to provide rotational driving power, the hollow motor having an internal space penetratively formed in a direction in which the rotation axis extends, a rotary screw extending and disposed in the internal space, the rotary screw being configured to rotate about the rotation axis of the motor, a power train coupled to a rear side of the motor and configured to transmit the rotational driving power of the motor to the rotary screw, and a nut coupled to the rotary screw and configured to advance or retreat toward the second brake pad.

Provided are an electromechanical brake and a vehicle including the same. An electromechanical brake according to an embodiment of the present disclosure includes a pair of brake pads disposed at two opposite sides of a disc and include a hollow motor configured to provide rotational driving power and having an internal space penetratively formed in a direction in which a rotation axis extends, a nut configured to rotate about the rotation axis of the motor, a Power train coupled to a front side of the motor and configured to transmit the rotational driving power of the motor to the nut, and a pressing screw coupled to the nut and configured to advance or retreat toward the brake pad.

A brake apparatus for a vehicle may include: a drive part configured to generate driving power; a pair of pressing parts configured to receive the driving power from the drive part and to apply or release a braking force; a load transmission part installed between the pair of pressing parts and configured to transmit a pressing load of any one of the pair of pressing parts to the other pressing part of the pair of pressing parts; and a load transmission restricting part configured to selectively restrict an operation of the load transmission part by pressing the load transmission part.

A disc brake (1) includes an electromechanical actuator (2), in particular an electromechanical parking brake actuator. The electromechanical actuator (2) includes a driveshaft (6), an electric motor (7) arranged on the driveshaft (6), a cam disc (5) arranged on an output shaft (49), and a transmission (8) arranged on the driveshaft (6) configured for transmitting the torque of the electric motor (7) to a force-transmission device (3). A magnetic brake (20) is disposed on the driveshaft (6) between the electric motor (7) and the cam disc (5) for arresting the driveshaft (6).

Disclosed is an actuator for a brake device. An actuator for a brake device according to embodiment of the disclosure includes a housing accommodating a motor, a power transmission unit connected to the motor, and a reduction gear unit connected to the power transmission unit; and a cover covering an open top of the housing and having a shaft support portion; wherein the reduction gear unit includes a worm wheel including a concave receiving groove on an upper surface thereof and a locking rib provided in the receiving groove, a sun gear supported rotatably on a bottom of the receiving groove and having a support rib contactable with the locking rib during rotation, and a clutch spring provided in a state of being slidably wound around an outer circumferential surface of the shaft support portion, and configured to tighten or loosen selectively an outer circumferential surface of the shaft support portion according to a rotation direction when the worm wheel and the sun gear are rotated relative to each other.