The invention relates to a disc brake, comprising a brake carrier, a brake caliper, brake shoes, and an actuating piston. The brake carrier has at least one mounting point for mounting on a vehicle. The actuating piston is displaceably accommodated on the brake caliper and is actuatable for carrying out a service brake function of the disc brake. At least one further actuating piston is provided, which in the direction of its longitudinal axis is displaceably accommodated on the brake caliper. For carrying out the service brake function, the at least two actuating pistons are actuatable, and for carrying out a parking brake function, one of the actuating pistons is actuatable. The invention further relates to a disc brake system and a parking brake system.

An electro-mechanical brake and a vehicle including the same are provided. As an electro-mechanical brake according to an aspect of the present invention, an electro-mechanical brake including a pair of brake pads disposed on both sides of a disc, may include a motor that provides a rotational driving force; a rotating screw that rotates about a second rotating shaft parallel to a first rotating shaft of the motor; a power transmission unit that transmits the rotational driving force of the motor to the rotating screw; and a piston that is coupled to the rotating screw to be able to move forward and backward to press the disc with the brake pads.

An electro-mechanical brake and a vehicle including the same are provided. As an electro-mechanical brake according to an aspect of the present invention, an electro-mechanical brake including a pair of brake pads disposed on both sides of a disc, may include a motor that provides a rotational driving force; a rotating screw that rotates about a second rotating shaft parallel to a first rotating shaft of the motor; a power transmission unit that transmits the rotational driving force of the motor to the rotating screw; and a piston that is coupled to the rotating screw to be able to move forward and backward to press the disc with the brake pads.

A longitudinal end of the nut has: at least one blocking face forming a means for blocking a rotation of the nut along a longitudinal axis of the nut, and at least one transmission face forming a means for transmitting a force directed along the axis. The blocking face or at least one of the blocking faces and the transmission face or at least one of the transmission faces have at least one common edge, and the blocking face or at least one of the blocking faces is concave.

The description relates to devices that include hinged portions and controlling rotation of the hinged portions with smart clutch control. One example can include powering a motor to cause clutch portions to engage in a first instance. The example can also include monitoring an operational parameter during the powering. The method can further include, based at least in part upon the monitoring, adjusting power to cause the clutch portions to engage in a second instance with a force that is different than the first instance.

An electromechanical brake apparatus includes a housing supporting an inboard brake pad and an outboard brake pad for selective frictional contact with a rotor interposed longitudinally therebetween. The housing includes a mechanism cavity located longitudinally between the inboard pad and a motor having a sun gear motor output shaft. An adjuster ramp assembly indirectly receives torque from the motor. A spindle is provided for selectively moving the inboard brake pad longitudinally. The spindle is operatively connected with the adjuster ramp assembly to indirectly receive torque from the motor therethrough. A leading ramp assembly is configured to transmit applied torque from the motor to the adjuster ramp assembly. The leading ramp assembly receives stepped-up torque from the motor via the sun gear motor output shaft and a plurality of planet gears located radially between the sun gear motor output shaft and a toothed inner lumen of the leading ramp assembly.

A roller screw system includes a spindle defining a longitudinal axis about which the spindle rotates. A nut at least partially radially surrounds the spindle. The nut is configured for longitudinal motion with respect to the spindle. At least one non-helically grooved roller is interposed radially between the spindle and the nut. A cage maintains the at least one roller in position radially between the spindle and the nut and supports the at least one roller for rotational motion. The nut is moved in longitudinally in a duty cycle responsive to transmission of rotational motion from the spindle to the at least one roller, and transformation of rotational motion of the at least one roller to longitudinal motion of the nut. A home position of the nut and a home position of the cage both move longitudinally after a predetermined number of duty cycles.

An example brake assembly comprises: a brake disk; an outer brake caliper disposed on a first side of the brake disk; an inner brake caliper disposed on a second side of the brake disk such that the brake disk is interposed between the outer brake caliper and the inner brake caliper; a mounting plate disposed adjacent to the inner brake caliper, wherein the mounting plate is coupled to the inner brake caliper and the outer brake caliper, and wherein the mounting plate comprises a slot; and a brake actuation lever pivotably coupled to the mounting plate and disposed through the slot of the mounting plate to interface with the inner brake caliper, wherein rotation of the brake actuation lever causes the inner brake caliper to move toward the outer brake caliper, thereby squeezing the brake disk between the inner brake caliper and the outer brake caliper.

An example brake assembly comprises: a brake disk; an outer brake caliper disposed on a first side of the brake disk; an inner brake caliper disposed on a second side of the brake disk such that the brake disk is interposed between the outer brake caliper and the inner brake caliper; a mounting plate disposed adjacent to the inner brake caliper, wherein the mounting plate is coupled to the inner brake caliper and the outer brake caliper, and wherein the mounting plate comprises a slot; and a brake actuation lever pivotably coupled to the mounting plate and disposed through the slot of the mounting plate to interface with the inner brake caliper, wherein rotation of the brake actuation lever causes the inner brake caliper to move toward the outer brake caliper, thereby squeezing the brake disk between the inner brake caliper and the outer brake caliper.

A method for controlling an electromagnetic brake (1) having a coil carrier (2), a solenoid (5), an armature disc (7), and at least one further force-exerting element. The internal and external poles (3, 4) of the coil carrier each have a front surface with a varying gradient that fits, in a complementary fashion, the front surfaces of the respective internal and external poles (8, 9) of the armature disc. The brake has an air gap (11) which varies in size and forms a stroke region (21). When excitation occurs, the solenoid generates a magnetic force, and the force-exerting element generates an opposing force, wherein the ratio of the solenoid's magnetic force and the opposing force varies at least once between greater than and smaller than one during the movement of the armature disc in the stroke region owing to the variation of the excitation of the solenoid.