Abstract: An actuator (7) comprises a housing (8) which contains a screw mechanism (9) and a motor (10) which is drivably connected to the screw mechanism (9), said screw mechanism (9) providing a linear movement in response to a rotational movement of the motor (10), and comprising a screw (12) and a nut (13) one of which is supported rotatably with respect to the housing (8) by means of a rolling element bearing (25, 62). Support means (22, 61) have been provided which extend axially with respect to the screw mechanism (9), said support means (22, 61) engaging the housing (8), and supporting the screw mechanism (9) so as to take up the axial loads exerted on said screw mechanism (9).

Abstract: A brake apparatus for a vehicle includes a housing including a bore formed therein. A piston is slidably positioned in the bore, the piston and bore defining a fluid chamber therebetween. A screw member is operatively engaged with the piston. The piston and screw member are movable based on fluid pressure in the fluid chamber and movable in a linear direction based on the rotational movement of the screw member.

Abstract: A control process can be carried out during parking braking by way of a parking brake arrangement. The brake is applied by way of a service brake cylinder, and a position of a piston rod is fixed by rotation of a self-locking rotating spindle and application of the rotating spindle to the piston rod or an element connected in front of the piston rod. By additionally rotating the rotating spindle during parking braking, compensation can be made for shrinkages, particularly of a brake disk and/or brake linings, which occur during brake cooling.

Abstract: An electric parking brake includes a motor and a transmission coupling a threaded lead screw to the output shaft of the motor. The transmission preferably includes a plurality of helical gears such that the lead screw and the output shaft are coaxial. A guide shaft extends substantially parallel to and spaced apart from the lead screw. A drive nut threadably receives the lead screw and slidingly receives the elongate guide shaft. A brake cable is connected to the drive nut at a position preferably located midway between the lead screw and the guide shaft. In operation, rotation of the lead screw causes linear motion of the drive nut along the lead screw and the guide shaft which causes tensioning and untensioning of the brake cable. The assembly preferably includes a manual override device operatively connected to the lead screw for manual rotation of the lead screw.

Abstract: A disc brake for a heavy road vehicle has a caliper (1) arranged at a brake disc (2) mounted on a wheel axle of the vehicle. A thrust rod (11) of the disc brake transforms a rotational ingoing movement from a drive means (3) into a linear outgoing movement for transmission to a disc brake pad (12), intended for braking engagement with the brake disc. The thrust rod has a non-rotatable spindle (20), a rotatable nut member (22) in thread engagement with the spindle, and a thrust rod gear (10) for receiving the ingoing rotational movement. A biased roller and ramp arrangement (30, 10′, 22′) is operationally interposed between the nut member (22) and the thrust rod gear (10) and is intended for rotating the nut member on the spindle at a low counterforce in the spindle and for axially transferring the nut member with the spindle at a high counterforce in the spindle.

Abstract: A disc brake for a heavy road vehicle has a caliper (1) arranged at a brake disc (2) mounted on a wheel axle of the vehicle. An electric motor (3) and two thrust rods (11) operationally connected thereto are provided in the caliper. The thrust rods transform a rotational ingoing movement from the motor into a linear outgoing movement for transmission to a disc brake pad (12), intended for braking engagement with the brake disc.

Abstract: A vehicle braking system having an operating member (103) by way of which a foundation braking force can be transmitted to a brake actuator in accordance with a driver's intentions, wherein there is provided a park brake mechanism (24) which provides the facility of electric motor driven actuation of the operating member (103) of the brake for the parking phase of braking.

Abstract: A brake apparatus for a vehicle includes a housing including a bore formed therein. A piston is slidably positioned in the bore, the piston and bore defining a fluid chamber therebetween. A screw member is operatively engaged with the piston. The piston and screw member are movable based on fluid pressure in the fluid chamber and movable in a linear direction based on the rotational movement of the screw member.

Abstract: An electronic controlled brake device comprises a ball screw for converting a rotational torque of an electric motor to an axial impulsive force of a spindle, a brake pad pressed against a disc rotor by the axial impulsive force of the spindle for generating a braking force, electronic control unit for controlling a drive of the electric motor and braking operation judging device for judging a braking operational condition. The spindle is moved from an initial position in a predetermined distance by the electric motor so as to back away from the disc rotor when the non braking operational condition is judged by braking operation judging device and thereafter is returned to the initial position by the electric motor.

Abstract: A service brake actuator (1), preferably for a heavy road vehicle, comprises in a housing (3, 4) a fluid actuated piston (5) with a piston rod (6). A lock actuator (2) combined with the service brake actuator comprises an axially movable push rod (13) for actuating the piston (5), a rotatable screw rod (18) in self-locking thread engagement with the push rod for axially transferring the push rod, and an electric motor (25) for rotating the screw rod (18).

Abstract: A braking force control apparatus is provided that controls the motor displacement to obtain a braking force that corresponds to the pedal depressing force. The braking force control apparatus detects the initial contact point between the pads and the rotor, which changes due to wear and heat deformation. The braking force control apparatus also adjusts a motor displacement command to enable an accurate braking force control. The braking force control apparatus detects the initial contacting point by detecting the electrical current value of the motor. When the motor is driven at a constant speed to contact the pads against the rotor, the electrical current value is stable. Thus, the initial contacting point is detected by using the motor displacement at the time when the electrical current value increases and becomes equal to or greater than the initial threshold value.

Abstract: A disc brake caliper with an integral parking brake includes a caliper housing defining a cavity therein and a piston axially translatable within the cavity and having an internal bearing surface. At least one brake pad is affixed to either the piston or the caliper housing. A parking brake mechanism is mounted within the cavity and is interposed between a portion of the housing and the piston. The parking brake mechanism includes a thrust pin substantially axially aligned with the piston and rotatable within the housing. A first radial clutch is engageable with the thrust pin, and a second axial clutch is operable upon the piston. Rotation of the thrust pin in a first direction causes engagement of the first radial clutch and of the second axial clutch causing axial displacement of the piston. Rotation of the thrust pin in an opposite direction causes disengagement of the first and said second clutches.

Abstract: The invention relates to an actuator assembly for a vehicle brake with a drive which is connected with an input side of a transmission. An output side of the transmission is adapted for the actuation of at least one friction element of the vehicle brake, with the transmission being a knee lever arrangement with two arms.

Abstract: The electric park brake of the present invention includes an electric caliper motor assembly. The electric caliper motor assembly includes a motor, which is operably coupled to a shaft. The motor and shaft are surrounded by a housing. A friction wheel is disposed axially and operably connected to the shaft within the housing. A park brake motor is disposed within a second housing. The second housing is connected to the first housing and positioned laterally in relation to the shaft. An acme screw is operably coupled to the park brake motor wherein the acme screw interacts with an acme nut. A lever is in juxtaposition to the acme nut and friction wheel. The lever is angularly displaced by the acme screw interacting with the acme nut to frictionally interact with the friction wheel when the park brake motor is activated. This provides a park brake feature and prevents movement of the shaft.

Abstract: An electromechanical brake system for a vehicle has a brake actuator installed to each wheel of the vehicle and a controller for controlling an operation of each brake actuator. The brake actuator is constituted to clamp a disc rotor by a pair of brake pads through a rotational motion converting mechanism according to an operation of the motor. The rotational motion converting mechanism is constituted by a screw shaft integrally connected to a rotation shaft of the motor and a ball screw screwed with the screw shaft and integrally connected to one of the pair of brake pads. When the vehicle is put in a stopping state, the controller drives the motor so that an ordinary use region of the screw shaft, which is contacted with balls of the ball nut during a brake operation, is faced with a lubricant hole formed at an end portion of the ball nut.

Abstract: A vehicle brake of the caliper type having electrically actuated active adjustment of the running clearance of a brake lining relative to a brake rotor, wherein, for brake operation, angular displacement of a rotatable component (14) of the brake by an external actuator causes axial displacement of a tappet arrangement (22, 24) within the brake whereby to transmit the actuator input load to the brake lining of the brake. The brake includes a switch for supplying a brake de-adjust signal when the brakes are to be opened for example for lining replacement. The switch is mounted on or in the body of the brake caliper and provides a non-contact switch arrangement actuated by a rotary movement provided by the rotatable component (14) of the brake in response to lining wear.

Abstract: A hydraulic vehicle brake (10) has a hydraulic chamber (16) which sealingly accommodates a brake piston (18) which can slide along an axis (A). The brake piston (18) acts upon a friction member and can be moved by means of hydraulic pressure which is supplied to the hydraulic chamber (16) into an actuating position in which it presses the friction member against a rotor (brake disk, brake drum, etc.). In order to be able to use the vehicle brake (10) besides its function as a hydraulic service brake also as a parking brake, a spindle/nut arrangement (24) is provided which is driven by an electric motor (42) and arranged coaxial to the axis (A) of the brake piston (18), the nut (30) of which arrangement (24) is secured against rotation, and by rotation of the spindle (26) as a function of the sense of rotation can either be moved into contact with the brake piston (18) or be moved away from the brake piston (18) translatorily along the axis (A).

Abstract: A brake caliper. A motor rotates a ball screw which translates a ball nut and a first drive pin. Translation of the first drive pin rotates a first brake lever attached to an eccentric cam shaft having a cam portion. Rotation of the cam portion on the eccentric cam shaft translates a piston shaft assembly, a piston head attached to the piston shaft assembly, and a first brake pad attached to the piston head. The first brake lever is attachable to, and rotatable by, a manually-actuated parking brake cable. This allows operation of the parking brake to stop the vehicle in an emergency should the motor fail to operate from whatever cause including loss of power.

Abstract: A single-actuation, synchronous dual closure disc brake device includes a mounting plate installed onto a fork leg, a U-shaped movable caliper base movably attached to the mounting plate and having an anti-rotation check opening, and a brake cable capable of being pulled and released to actuate a bidirectional, thrust cylinder driver. The thrust cylinder driver is ensleeved within the anti-rotation check hole in the center section of the mounting plate and reciprocally moves an inner motion guide sleeve and an outer motion guide sleeve. Such movement brings inner and outer brake pads into the inner and outer motion guide sleeves double-sided and opposing clamping of a brake disc.

Abstract: An actuator for use in a brake caliper is situated at opposite ends of a screw mechanism. A reduction gear mechanism is located at a distance from the actuating member. The reduction gear mechanism is included in a reduction gear module and a screw mechanism is contained in a screw mechanism module, which are interconnected through a drive module. The drive module may be located at the end of the reduction gear module facing away from the screw mechanism module. The modules may be axially aligned or at least two modules may be axially shifted or eccentric with respect to each other. The screw mechanism module may comprise an angular contact bearing which may be supported in a housing in different ways. The reduction gear module may be part of a planetary gear system.

Abstract: The invention relates to an electromechanically actuatable disk brake with a housing, a friction pad against which an electrically actuatable actuator acts, with the actuator comprising an electric motor and a spindle/nut transmission arrangement, characterised in that the electric motor is configured as an internal rotor motor with a stator and a rotor, the rotor of which is coupled non-rotably with the spindle, the spindle is operatively coupled with the nut in order to transform a rotational movement of the spindle into a translatory movement of the nut, the spindle is supported along its longitudinal extent in at least two places so as to be rotatable relative to the housing, and the nut is guided axially slidable relative to the housing.

Abstract: The present invention provides a motor driven brake system for generating and releasing braking forces by reciprocal movement of a pair of pads disposed at opposite sides of a disk having an axis. The system comprises a single electric motor, an output portion adapted to be rotated by the electric motor, a first pad pressing member for pressing a first pad against the disk a second pad pressing member for pressing a second pad against the disk, a first converting mechanism and second converting mechanism. The first converting mechanism converts rotation of the output portion to a linear motion so as to move the first pad pressing member reciprocally along the axis of the disk. The second converting mechanism converts rotation of the output portion to a linear motion so as to move the second pad pressing member reciprocally along the axis of the disk.

Abstract: Suggested is a disc brake for motor vehicles which can be actuated by means of an electric motor with the interconnection of a reduction gear and which includes a floating caliper with two friction linings arranged within the brake caliper so as to be displaceable therein. The reduction gear is constructed as a threaded roller drive with threaded roller recoil the axially displaceable spindle whereof brings one of the two friction linings into engagement with a brake disc. For the purpose of realizing a clamping or arresting function this invention suggests to provide a clamping or arresting device (34) cooperating with a rotating part (11) of the reduction gear (7) or with a part (21) having power-transmitting connection to the reduction gear (7) so as to lock the latter.

Abstract: The invention relates to an electromechanical wheel brake device with a brake caliper that is embodied of one piece with a gear housing in which a planetary roller screw drive for pressing frictional brake linings against a brake disk and a bevel gear pair for driving the planetary roller screw drive to rotate are accommodated. In order to keep a ring gear free of a force that acts axially on a nut of the planetary roller screw drive when the frictional brake linings are pressed against the brake disk, the device affixes a ring gear of the bevel gear pair in a rotationally fixed and axially mobile manner to the nut, for example by means of a multi-groove profile, and supporting the bevel gear with a separate axial bearing in the rigidly embodied gear housing.

Abstract: A force transmitting and converting mechanism for an electric braking device comprising a gear, a nut, a rotating body, a ramp mechanism, a screw member, and a brake element. The gear is rotated by the electric motor, and the nut disposed being opposed to the gear. The rotating body is disposed between the gear and the nut. The ramp mechanism is operated so that the gear and the nut can be separated from each other by a relative rotation of the gear with the nut. The screw member is screwed to the nut, and the brake element is capable of coming into contact with the screw member.

Abstract: The present invention relates to a disc brake with hydraulically operable brake pads and a mechanical actuating which includes an actuating shaft that is rotatably and sealedly mounted in a bore of a brake housing and acts upon at least one of the brake pads. The present invention focuses on that at least in the area of a shaft duct, a sealing element is provided which is fixed to the actuating shaft so as to rotate along with it and cooperates with at least one associated sealing element and/or mating sealing surfaces in a radial direction. The sealing element bridges a portion of the actuating shaft which is different from the shape of a circle.

Abstract: A device for actuating a vehicle brake, which device comprises a threaded spindle (1) which is secured against rotation in a stationary housing (4) while being axially displaceable toward and away from a brake disc (6) of the vehicle brake, and further comprises a nut (2) which surrounds the threaded spindle (1) and effects a displacement thereof, the nut (2) having a longitudinal axis and being mounted for rotation about this longitudinal axis in the stationary housing (4) while being connected to the rotor of a drive motor (9), comprises, according to the invention, a motion-transmitting ramp unit (10) equipped with rolling elements and arranged between the nut (2) and the drive motor (9).

Abstract: An electromechanically actuatable brake, in which a brake lining is pressed by an electric motor against a brake disk via a threaded roller drive. To enable releasing the brake in the event of a malfunction, a nut of the threaded roller drive is braced axially via a self-locking-free spindle, which is blocked against relative rotation by a permanent magnet brake, the permanent magnet brake is releasable by supplying current to the permanent magnet brake. When the permanent magnet brake is releasable by having current supplied to it, the brake lining pressed against the brake disk sets the spindle, forming the bracing means, into rotation and presses the entire threaded roller drive away from the brake disk and as a result the brake is released.

Abstract: The invention relates to a parking brake system for motor vehicles. The system has an adjusting unit (9) comprising a motor-driven drive mechanism (10) in order to tighten or loosen an actuating pull (18, 19) of a brake device (7), whereby the drive mechanism (10) is drive connected to a component (5) which is mounted in a non-displaceable manner with regard to the longitudinal axis (6) such that it can rotate around said longitudinal axis (6). The component (5) is rotationally fixed to a telescopic device (4) arranged such that it can be displaced in the direction of the longitudinal axis (6). The axial length of the telescopic device (4) is increased or decreased according to the direction of rotation of the component (5), and each axial end (2, 3) of the telescopic device (4) is respectively connected to an actuating pull (18, 19) for a brake of the brake device (7) in an indirect or direct manner.

Abstract: An electromechanical wheel brake device with a screw link actuator that is supported in a floating caliper, and driven by an electric motor. The screw link actuator can press a frictional brake lining against one side of a brake disk. The floating caliper can press a second frictional brake lining against the other side of the brake disk by means of a reaction force. In order to release the wheel brake device in the event of a malfunction, the screw link actuator as self locking-free, supports both a spindle nut and a threaded spindle so that the spindle nut and threaded spindle they can rotate, and securing the threaded spindle against rotation by means of a releasable rotation prevention device. In the event of a malfunction, the rotation prevention device is released and the frictional brake lining that is pressed with force against the brake disk pushes the threaded spindle away from the brake disk, wherein the threaded spindle is set into rotation and moves away from the brake disk.

Abstract: The invention concerns an electromechanical brake, in particular a disc brake (10), comprising a brake pad (14) which can be urged against a brake disc (16) by means of an electromotive actuating arrangement (18). According to the invention, in order to be able to release the brake (10) in the event of an electronic component failing, for example, a releasable support device (42) supports the actuating arrangement (18) on a brake calliper (12) when the brake pad (14) is urged against the brake disc (16). In order to release the support device (42), its distance from the brake disc (16) is increased such that the actuating arrangement (18) and together therewith the brake pad (14) are released from the brake disc (16).