Provided is a brake device that is able to achieve an improvement in versatility of the device, and which is able to reduce an uncomfortable feeling and annoyance caused by an operating noise of a parking brake. This brake device includes: left and right parking brake mechanisms configured to independently apply braking forces to left and right wheels of a vehicle, respectively, and hold the vehicle stationary; and a control device configured to control these parking brake mechanisms. The control device includes a parking brake actuation determiner configured to adjust respective timings at which the left and right parking brake mechanisms are actuated so as to reduce an uncomfortable feeling caused to an occupant of the vehicle.

A brake includes a caliper overlapping a disk. The brake also includes a first pad and a second pad which are carried by the caliper on either side of the disk. The brake further includes a first actuator including a first primary toothed wheel driving a first mobile piston pressing against the first pad in order to move same. The brake further includes a second actuator including a second primary toothed wheel driving a second mobile piston pressing against the second pad. The brake further includes a rotating shaft including a first and a second endless screw having opposite winding directions, the shaft being movable in translation. The brake further includes an electric motor for driving the rotating shaft. The first and second endless screws are engaged in the first and second primary toothed wheels respectively.

An electro-hydraulic actuator for actuating a brake caliper may have an electric motor with a drive shaft, a transforming mechanism and a first housing to accommodate the transforming mechanism and support a second housing of the electric motor. The transforming mechanism may include a reduction gear to demultiply the rotary motion of the drive shaft. The reduction gear may have a crown with inner toothing in one piece and that is rotationally locked. The crown may have a front portion directly shape-coupled to and inserted in the second housing of the electric motor and a connection integral with the first housing of the transforming mechanism for a precise centering between the electric motor and the reduction gear with respect to the axis of the drive shaft and with respect to a central axis of the reduction gear.

An actuator assembly for an electronic parking brake in which a center pin is not fixed with the components of a planetary gear mechanism to prevent the deviation of the axis of the planetary gear mechanism, and in which the axial direction alignment of a planetary gear mechanism is stable, thereby increasing the output efficiency of the planetary gear mechanism and providing a noise attenuation function.

The electric braking device includes a nut that is a rotating member that rotates upon receiving the rotation of an electric motor, a screw shaft that is a linear motion member that linearly moves in accordance with the rotation of the nut, and a piston that linearly moves together with the screw shaft to press a brake pad against a brake rotor. The piston is provided with a socket hole that is a spherical hole, and the screw shaft is provided with a spherical ball head that fits into the socket hole. With the ball head fitted into the socket hole, the piston is pivotably coupled to the screw shaft.

A disk brake that includes, between an internal gear (69) and a first housing portion (19) of a housing (18), each of protrusion portions (105) provided on the internal gear side and engagement recessed portions (44) provided on the first housing side that are engaged with each other to restrict a relative rotation. Each of these protrusion portions on the internal gear side and engagement recessed portions on the first housing portion side are disposed along a direction perpendicular to a straight line connecting a radial center of a second speed reduction gear (67) and a radial center of a first speed reduction gear (54). Due to this configuration, the disk brake can improve the precision of the position of the internal gear of the planetary gear speed reduction mechanism (27) while reducing the cost.

A screw actuator comprises a screw shaft for threaded engagement with an actuator output device such that rotation of the screw shaft causes linear movement of the actuator output device; and a motor for driving rotation of the screw shaft. A no-back device is included for restricting movement of the screw shaft in response to feedback torque applied due to external forces on the actuator output device.

A sensor arrangement for detecting a pedal movement in a vehicle includes a measurement value transmitter that is arranged on a piston that is translated by the pedal movement and a measurement value sensor that is arranged in a stationary manner in the movement region of the piston. The measurement value sensor in connection with the measurement value transmitter generates a signal that represents the pedal movement. The measurement value transmitter and the measurement value sensor are configured as inductive sensors. The measurement value transmitter has at least one detection region, and the measurement value sensor has at least one detection coil. The at least one detection region of the measurement value transmitter influences the inductance of the at least one detection coil such that the changing inductance of the at least one detection coil of the measurement value sensor is interpreted as a measure of the pedal movement.

A brake system comprising: (a) a body assembly comprising: (i) an outboard side, (ii) an inboard side, (iii) a bridge extending between and connecting the inboard side and the outboard side, and (iv) two or more piston assemblies located entirely on the outboard side, entirely on the inboard side, or located both on the inboard side and the outboard side; and (b) an electric brake assembly comprising: (i) one or more differential assemblies in communication with the body assembly and each of the two or more piston assemblies; wherein the one or more differential assemblies provide power equally to each of the two or more piston assemblies so that each of the piston assemblies are moved axially in unison until a resistance of one of the two or more piston assemblies becomes higher than a remainder of the two or more piston assemblies and the one or more differential assemblies transfer power from the piston assembly with the higher resistance to the remainder of piston assemblies with a lower resistance so that the piston assembly with the higher resistance ceases to move and additional power is supplied to the remainder of the piston assemblies.

A method and device are provided for indicating wear of at least one brake pad in a disc brake having an electric motor actuator. The method adds up wear adjustment travel paths of the electric motor actuator and/or of an adjustment motor, and indicates the sum of the wear adjustment paths so obtained as the wear of the brake pad or as a residual brake pad service life.