The present disclosure is mainly directed to simplifying a design structure of an electronic mechanical brake and reducing manufacturing costs by removing an elastic member and a friction member.

In addition, the present disclosure is also mainly directed to improving the performance of a brake by changing a shape of a caliper body so that the caliper body replaces a clamping force support structure, of which a function is performed by an elastic member and a friction member, and solving a brake instability problem.

An actuator of an electric parking brake is disclosed. An actuator of an electric parking brake according to one embodiment of the present invention includes a driving unit which outputs a rotational force through a driving shaft, a first gear unit which receives the rotational force from the driving unit, a second gear unit including a rotation shaft which receives the rotational force from the first gear unit to rotate, and a driving shaft control unit which is disposed on the driving shaft, provides a degree of rotational freedom to the driving shaft during braking, and fixes the driving shaft to prevent reverse rotation of the driving shaft due to a reverse rotation torque when the braking is ended.

A brake system includes an electromagnetic brake device configured to apply a brake to a rotary shaft when current is not applied to the brake system and release the brake on the rotary shaft when current is applied to the brake system; and a brake release device configured to forcibly release the brake on the rotary shaft when current is not applied to the brake system. The brake release device includes a guide member having a tube shape; a release plate disposed within the guide member and engaged with the armature; and a transfer unit that is configured to move the release plate in a direction in which the rotary shaft extends.

A magnetorheological braking device has two braking components that are continuously rotatable relative to one another. A first braking component extends in the axial direction and the second braking component includes a hollow casing extending around the first braking component. A peripheral gap is filled with a magnetorheological medium. The first braking component has an electric coil and a magnetically conductive core which extends in the axial direction. A star contour with magnetic field concentrators on the core and/or on the shell part project into the gap, which results in a peripheral gap region with a variable gap height. The electric coil is wound around the core such that a magnetic field runs through the core and the magnetic field concentrators and through the gap into a wall of the casing. A star contour is formed by a stack of star plates.

A controller of an electric brake device includes first, second and third PKB operators. Upon receipt of an instruction to produce a parking brake active state while a parking brake is released, the first PKB operator exerts a braking force without depending on a brake pedal and determines if a desired braking force is exerted. After the determination by the first PKB operator, the second PKB operator makes a movable part ready to come into engagement with an engaged part and causes an electric motor to rotate in a direction in which the braking force is decreased, so that the movable part comes into engagement with the engaged part to prevent the rotation of the electric motor. Then, the third PKB operator produces the parking brake active state where no driving power is generated to the electric motor.

A brake assembly comprising: (a) a caliper including: (i) one or more pistons, (b) one or more rotary to linear actuators that provides an axial force to move the one or more pistons, (c) a motor gear unit in communication with the one or more rotary to linear actuators, the motor gear unit including: (i) a motor; and (b) a motor brake that prevents movement of the motor gear unit, the pistons, or both when the motor is turned off so that a brake apply is maintained, the motor brake including: (i) housing; (ii) an engaging element; (iii) a sleeve, and (iv) a solenoid that is in communication with the sleeve so that when the solenoid moves the sleeve, the engaging element is moved into contact with the housing creating a braking force.

A robot joint is connectable to at least another robot joint via an output flange. The robot joint includes a joint motor having a motor axle configured to rotate the output flange. The robot joint includes a brake assembly having an annular brake member that is rotatable and a resilient member arranged on the motor axle. The annular brake member and the resilient member are arranged between a first locking member and a positionable locking member, where the positionable locking member can be fixed at a plurality of positions along and at the motor axle. An engagement member is movable between an engaging position and a non-engaging position, where in the engaging position the engagement member engages with the annular brake member and prevents rotation of the annular brake member around the motor axis. The annular may include brake protrusion that includes two slats forming a triangular-like shape.

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).

A brake system includes an electromagnetic brake device configured to apply a brake to a rotary shaft when current is not applied to the brake system and release the brake on the rotary shaft when current is applied to the brake system; and a brake release device configured to forcibly release the brake on the rotary shaft when current is not applied to the brake system. The brake release device includes a guide member having a tube shape; a release plate disposed within the guide member and engaged with the armature; and a transfer unit that is configured to move the release plate in a direction in which the rotary shaft extends.

A rotational coupling includes a rotor configured for rotation about a rotational axis. The rotor includes a hub disposed about the axis and configured to receive a shaft and a disc extending radially outwardly from the hub. An armature and electromagnet are disposed on opposite axial sides of the disc. The electromagnet is fixed against rotation. A bearing is disposed between the hub and the electromagnet. The hub and electromagnet engage the inner and outer races, respectively of the bearing on opposite axial sides of the bearing. A spacer is disposed radially inwardly of the electromagnet and engages the inner race of the bearing on the same axial side of the bearing as the electromagnet. An air gap separates the spacer from the electromagnet. A shield is supported by the spacer and extends radially outwardly therefrom such that a portion of the shield is axially aligned with the air gap.