Abstract: A clamp slide for use in a linear guide includes a slide body, two piston units disposed in the slide body, two elastic members stopped against the piston units, and two fluid pressure cylinders pushing the piston units to move toward a direction against restoring forces exerted by the elastic members. Further, a moveable member is disposed in each of the piston units and pushed by an inclined plane of a lateral cover to push a braking member, such that a rail is clamped by the left and right braking members. The lateral cover can be assembled in different ways according to actual needs for enabling the inclined plane to perform opposite tilt direction. As such, the clamp slide of the present invention has the effects of simplifying structure and reducing cost.

Abstract: A device for actuating a brake shoe of a brake, in particular a disk brake, includes a pivotably mountable lever element, and a transmission element configured to be mounted in a longitudinally movable fashion is such that a pivot movement of the lever element is translated into a longitudinal movement of the transmission element wherein a hydraulic chamber configured to be filled with a hydraulic fluid is arranged between the brake shoe and the transmission element for the transmission of force between the brake shoe and the transmission element.

Abstract: A friction element latch device includes: a screw provided to be rotatable by receiving power from a driving source; a piston arranged to be movable by rotation of the screw; a guide arranged to selectively restrict movement of the piston; a guide pin protruding in a radial direction from an outer circumferential surface of the piston and guided by the guide; and a friction element arranged to be engaged as the piston moves.

Abstract: A motor-driven friction braking device for a rail vehicle is mainly composed of a torque motor, a speed reduction mechanism, an electromagnetic brake (1), a screw nut transmission mechanism and a brake friction pair (9). The torque motor, a screw (7), the speed reduction mechanism and the electromagnetic brake (1) are coaxially mounted; the torque motor is fixedly connected to the speed reduction mechanism, and the speed reduction mechanism is fixedly connected to the screw (7); the screw (7) is in non-self-locking threaded connection with a nut (8), and one end of the nut (8) is connected to the brake friction pair (9); and the electromagnetic brake (1) is mounted on the screw (7).

Abstract: The present disclosure relates to a method for operating a vehicle brake system which includes the following steps: (1) determining a first wear value, which indicates wear of the friction lining of the vehicle brake, by taking into account at least one of the relevant parameters related to the operational history of the vehicle; (2) In dependence upon whether the first wear value meets a predetermined criterion, measuring the wear of the friction lining by moving the parking brake unit and by recording the curve of operating parameters of the parking brake unit while moving; (3) determining, based on the measurement, a second wear value, which indicates wear of the friction lining of the vehicle brake. The present disclosure also relates to a vehicle braking system, as well as a computer program and a control unit for implementing the method.

Abstract: An operating shaft and an actuation mechanism for a disc brake. The actuation mechanism may include a wear adjuster mechanism and the operating shaft. The operating shaft may include opposed pairs of arcuate surfaces arranged with offset axes of rotation and a recess therebetween for accommodating a portion of the wear adjuster mechanism.

Abstract: A brake assembly comprising: (a) a caliper; (b) two or more brake pads; (c) one or more pins connecting each the two or more brake pads to the caliper; (d) a retraction device connected to one or more of the one or more pins, the retraction devices including: (i) a lock that connects to an end of the pin opposite a caliper; and (ii) a bias device located between the lock and one of the two or more brake pads; wherein during a brake apply each of the two or more brake pads are moved towards the respective retraction device compressing the bias device between the lock and one of the two or more brake pad so that upon release of the brake apply the retraction device applies a retraction force to the one of the two or more brake pads.

Abstract: A disk brake for a utility vehicle is provided. A brake caliper of the disk brake includes a receiving chamber configured to receive a brake application device with a pivotable brake lever. The brake lever is supported at one end on a bridge supporting at least one brake piston and at the other end on a wall of the brake caliper forming a caliper head. A pivot bearing is provided for supporting the brake lever on the caliper head or the bridge. The pivot bearing includes a receptacle having a circular-arc-shaped cross-section and has a pivoting body configured to be located in the receptacle. The brake lever is retained in such a way that the brake lever is secured against displacement transversely to the pivoting direction of the brake lever by at least one securing element arranged in the region of the pivoting body extending axially on both sides of the securing element.

Abstract: A lock shaft and a shaft member (a plunger and a permanent magnet) of a magnetic locking device are arranged such that a moving direction thereof is orthogonal to a moving direction of a piston rod of a hydraulic actuator. In a parking lock released state, when the coil is not energized, the lock shaft and the shaft member are locked by an attracting force between the permanent magnet and a flange of a yoke so as not to move back from the piston rod, and, when the coil is energized, the attracting force between the permanent magnet and the flange is canceled, so that the lock shaft and the shaft member are allowed to move back from the piston rod.

Abstract: This electric braking device transmits power generated by an electric motor to a pressing member and causes pressing force to be generated by the pressing member with respect to a friction member. The electric braking device includes a lock mechanism. A locked state (in which movement of a locked section in a direction in which pressing force decreases is impossible) is achieved in the lock mechanism by: performing “supplied power amount reduction control” in which the amount of power supplied to the electric motor is reduced while a locking member is maintained in a lockable position; causing the locked section to move in the direction in which pressing force decreases; and causing the locking member and the locked section to engage. When performing supplied power amount reduction control, the amount of power supplied is first reduced by a large reduction gradient and then reduced by a small reduction gradient.

Abstract: A method for locking the rope winch which is characterized by the fact that the locking bolt is inserted when the rope drum of the rope winch is stopped, first, through one of two holes in the first lug, then through one of the arched cuttings on the wheel of the rope drum of the rope winch, and finally through one of two holes in the second lug, Then the locking bolt is secured in position with a nut.

Abstract: A brake caliper includes a caliper body. The caliper body has a first accommodation trough and a second accommodation trough. The first accommodation trough is provided with at least one piston and two first brake linings pushed by the piston. The second accommodation trough is provided with two second brake linings. The two second brake linings are connected with a drive unit. When the user pedals the brake pedal of a vehicle, the brake master cylinder of the vehicle pushes the piston to link the two first brake linings to clamp both sides of the disc to perform foot brake. When the user activates the electric parking brake of the vehicle, the drive unit will push the two second brake linings to perform electronic hand brake.

Abstract: A brake assembly having a brake carrier, a housing, and a bridge. The brake carrier may support at least one brake pad assembly. The housing may be disposed on the brake carrier. The bridge may be fixedly disposed on the housing. The bridge may extend over the brake pad assembly.

Abstract: The invention is related to an above-knee prosthesis knee-joint mechanism that is connected with a stump which enables the above-knee amputees to walk. The invention is a threaded prosthesis knee-joint or knee-joint prosthesis which has a moving cylinder joint that enables the movement of the tibia prosthesis that is matched with the femur that is connected with the shoe having a horizontal-angle thread and threads above the femur and the shoe.

Abstract: A brake device includes a control device which performs feedback control using a braking force of a linear motion mechanism as a controlled variable. The control device includes a computing unit for computing an operating quantity (voltage applied to an electric motor) for canceling out fluctuations in braking force, and a frequency detector for detecting the frequency of the operating quantity. The control device further includes an operating quantity limiting unit which limits the operating quantity according to a predetermined parameter when the detected frequency is higher than a predetermined frequency threshold (i.e. when the detected frequency is in a high-frequency range in which the permissible value of the braking force fluctuations is high). Thus, it is possible to reduce the output of the electric motor within a range in which the braking force fluctuations does not exceed the permissible value, thereby reducing the power consumption.

Abstract: A surgical instrument is provided having articulating, distal end rotation and tip rotational functions. The articulating function includes a wheel rotatable relative to a handle of the surgical instrument and operable to move an articulating section of the surgical instrument from a neutral or straight position to an articulated or bent position. The wheel incorporates a groove in the form of an Archimedes spiral to drive the articulating section between the neutral and bent positions.

Abstract: A braking apparatus is described which is used to control the motion of a sliding platform of a pickup truck in order that the sliding platform may be stopped anywhere along its travel for convenience. The sliding platform is used to load and unload freight from the pickup truck when in an extended position at the rear of the truck. When the truck is parked on ground which is uneven the sliding platform is provided with energy which must be dissipated when it is moved from one position to another. When the usual braking device is released (usually a pin located appropriately in the tracks of the platform members) the sliding platform is in a “runaway” condition. The brake described here is capable of preventing this condition.

Abstract: Disc brake with a floating calliper and controlled brake piston, a movement conversion cartridge (200) comprising a rear part which is supported against the base of the receptacle in the calliper and a control shaft (220) which passes through the base. The cartridge (200) is retained in place by a cage (490) which is locked resiliently on the wall of the receptacle. The piston (270) comprises longitudinal ribs (274) which are placed in longitudinal grooves provided in the receptacle, with interposition of an anti-deformation device (400) interposed between the branches (274) of the piston (270) and the grooves of the receptacle of the calliper, and comprising a ring (410) which supports lugs (420) distributed according to the branches (274) and having cylindrical tongues which are curved according to the form of the cross section of the branches, and thus ensure the locking in rotation of the conversion piston (270), whilst permitting its movement of translation.

Abstract: A disk brake including a simplified structure for retaining the braking force of a parking brake. The disk brake is equipped with a piston holding mechanism having a ball-and-ramp mechanism in which balls are moved by rotation transmitted from a motor, causing a rotary-rectilinear ramp to press a piston. The rotary-rectilinear ramp has an external thread engaged with an internal thread formed on a base nut that is immovable in a rotor axis direction relative to a caliper body. The external thread, when a force is applied thereto from the piston in the rotor axis direction, can retain the position of the rotary-rectilinear ramp in the rotor axis direction. Thus, the structure for retaining the braking force of the parking brake can be simplified to improve production efficiency.

Abstract: A disc brake comprising a floating stirrup and a brake piston controlled via a motion conversion cartridge (200) comprising a rear part pressed against the bottom of the stirrup and a control shaft passing through the bottom. The front part of the cartridge is pressed against the brake piston. It comprises a piston (240) provided with a plate (242) cooperating with the plate (212) of the control shaft (210) with the interposition of balls cooperating with tracks in the form of ramps for transforming the relative rotational motion of the plate (212) relative to the other (242) into a translational motion of the piston (240). The cartridge (200) is held in place in its housing (113) by a cage (260) attached elastically to the wall of the housing. The plate of the piston (240) comprises longitudinal grooves (243) receiving the branches (233) of a lock (230) which is elsewhere blocked in rotation in the housing of the stirrup while leaving the conversion piston (240) free in translation.

Abstract: A disk brake device has a rotor, a carrier, a caliper, an inner pad, and a braking operation mechanism. The braking operation mechanism includes a base plate held by the caliper; a wedge plate which holds the inner pad; a first motion conversion mechanism which moves the wedge plate in a direction perpendicular to a braking surface while moving the wedge plate to slide in a rotating direction of the rotor; an electric motor which includes a motor output shaft which outputs a rotational driving force; and a second motion conversion mechanism which includes a cam drive shaft and moves the wedge plate to slide in the rotating direction of the rotor in parallel to the braking surface. The electric motor is attached to the caliper such that the motor output shaft is positioned on the outer circumferential side with respect to the cam drive shaft.

Abstract: A friction brake device includes a brake rotor which has a main rotor and a sub-rotor which are spaced apart from each other along a rotation axis and extend around the rotation axis over the entire circumference, and a cylindrical part integrally connecting their outer peripheral portions of the main rotor and the sub-rotor, first and second friction members which are supported between the main rotor and the sub-rotor by a stationary member so as to relatively displace along the rotation axis and extend annularly around the rotation axis, and pressing devices which press the first and second friction members against the main rotor and the sub-rotor, respectively.

Abstract: A self-energizing disc brake includes a brake-internal hydraulic arrangement with a supply circuit and an expansion vessel, a brake application device with a brake application cylinder for applying a brake pad in the direction of a brake disc, a force transmission unit which supports the brake pad at a wedge angle on the brake application device, a tangential-force absorbing cylinder for switching over the wedge angle and being operatively connected to the force transmission unit; an electric-motor actuator which acts on the brake application device via the hydraulic arrangement, a distributor cylinder arranged in series between the electric-motor actuator and the brake application device for pressure boosting, and a control unit for controlling switchover of the wedge angle between the tangential-force absorbing cylinder and the electric-motor actuator. An adjusting device adjusts brake pad wear, and has a movable screw spindle, which is operatively connected to the brake application device.

Abstract: A self-energizing disc brake includes a brake-internal hydraulic arrangement with a supply circuit and an expansion vessel; a brake application device having a cylinder for applying a brake pad toward a brake disc; a force transmission unit supporting the brake pad at a wedge angle on the brake application device; a tangential-force absorbing cylinder for switching over the wedge angle, which is operatively connected to the force transmission unit; an electric-motor actuator for acting on the brake application device via the hydraulic arrangement; and a control unit. The force transmission unit has a deflection lever and a shoulder element attached thereto. Rolling surfaces thereof are in contact with respective corresponding rolling surfaces of a brake application element of the cylinder and a brake pad support device. The deflection lever has a pressure section with a rolling surface in operative connection with the tangential-force absorbing cylinder.

Abstract: An electro-mechanical brake assembly comprising a brake disk stack having a center axis; and a plurality electro-mechanical actuators for applying braking pressure to the brake disk stack. The actuators are circumferentially arranged around the center axis, and each actuator includes a housing, a linearly movable ram, a screw for linearly moving the ram, a nut mounted for rotation in the housing and operatively engaged with the screw such that rotation of the nut effects linear movement of the screw for urging the ram into forceful engagement with the brake disk stack, an electric motor for rotating the nut, and an anti-rotation device for preventing rotation of the screw relative to the housing when the nut is rotated to effect linear movement of the screw. The foregoing arrangement provides for greater stroke than prior art actuators without sacrificing durability and performance.

Abstract: A friction brake device for a vehicle includes: a hydraulic brake unit including a piston member for pressing a friction member by advancement; an electric brake unit including a nut member being relatively movable in a piston movement direction with respect to the piston member by a motor and for pressing the piston member by advancement; a piston return mechanism including a biasing member for making biasing force, oriented in a retreat direction, elastically act on the piston member in accordance with a relative advancement amount of the piston member with respect to the nut member; and a controller for controlling the motor. The controller determines whether an adjustment permission condition associated with a wear amount of the friction member is satisfied. When the condition is satisfied, the controller allows the motor to perform a relative position adjustment of the nut member with respect to the piston member.

Abstract: In a frictional transmission having at least one rolling contact element, which is guided in frictional engagement between two running surfaces and is furthermore guided by a cage, one of the running surfaces is arranged in a fixed location and the second running surface and the cage are embodied so as to rotate in such a way that an input torque can be introduced via one of the elements, namely the cage or the second running surface, and an output torque can be output via the other element, namely the second running surface or the cage.

Abstract: Some of the components of a parking brake mechanism are incorporated between an inner side case and an outer side case, the two case and are combined by engaging lock holes and lock claws, and an inner side auxiliary assembly is formed. In this state, the diameter of circumscribed circle of the lock claws is configured to be smaller. Then, when the inner side auxiliary assembly is incorporated in the cylindrical space, the two lock claws are engaged with a lock concave which is formed on the inner peripheral surface of the cylindrical space by making the two lock claws protrude greatly from the outer peripheral surface of the inner side case.

Abstract: A brake device of a railway vehicle, having at least one operating brake cylinder having at least one operating brake piston actuated by a pressurizing medium, the piston actuating an operating brake piston rod coaxial to the brake cylinder axis, and having a parking brake device having a pivotally supported actuating lever, the rotary motion thereof being transmitted to a shaft rotationally supported by at least one shaft bearing on a housing, wherein the rotary motion of the shaft induced by the actuating lever can be converted to a linear motion parallel to the brake cylinder axis of at least one support roller rotationally supported by a support roller bearing on a rotary axis disposed parallel to the shaft, in that at least one cam having an operating cam face and rotationally fixed to the shaft is provided, the cam interacting with a radially outer support roller surface of the support roller during a tightening or releasing stroke of the parking brake device, wherein the linear motion of the support ro

Abstract: A part-lining disk brake is described, having an electromechanical actuator, a self-energizing application device with a wedge arrangement designed to press a brake lining against a disk brake, and at least two wedge elements of the wedge arrangement moveable relative to one another, arranged on one of a brake caliper frame and an auxiliary frame. The wedge elements are used to apply the brake lining, and act on the brake lining via a trapezoidal pressure plate.

Abstract: A brake device includes: a damper; an advancing and retreating member; a support section; and wedge members. The support section is provided on an opposite side to the wedge members with respect to the advancing and retreating member, and is capable of supporting the advancing and retreating member on an application side in a drive direction. On one of the support section and the advancing and retreating member, there is provided a raised strip section which extends in a braking direction. On the other of the support section and the advancing and retreating member, there is provided a groove section which restricts movement of the raised strip section towards a release side in the drive direction, and restricts movement of the raised strip section to both sides in a widthwise direction orthogonal to the drive direction and the braking direction.

Abstract: A brake unit, preferably for a rail vehicle, including in a housing: a piston, and a push rod in the form of a spindle in an axial slack adjuster. The axial directions of the piston and the push rod are substantially perpendicular to each other, and means are provided for force transmission between these parts. The force transmitting means includes wedge elements at the underside of the piston cooperating with a driver element coaxial with and force-transmittingly connected to the spindle. The driver element is supported with rolling friction by the housing for movements in the axial direction of the spindle, and the spindle is axially guided by the housing at its forward end.

Abstract: A power tool braking device of a portable power tool includes at least one braking unit that is configured to brake a spindle of the portable power tool and/or a machining tool in at least one braking position of the braking unit. The power tool braking device further includes at least one spindle fixing unit that is configured to fix the spindle in at least one fixing position of the spindle fixing unit. The braking unit and the spindle fixing unit are at least partially configured as a single piece.

Abstract: A braking device includes a base, a braking component, and a driving component including a reset member. The braking component has a clamping block. The driving component includes a movable member, a chamber therein and a first butting portion. The movable member passes through the driving member. One end of the movable member has a piston accommodated in the chamber, and the other end of the movable member has a second butting portion. The reset member is disposed in the chamber. The piston butts the reset member under an external force, and the first butting portion and the second butting portion are kept away from each other, and when the external force vanishes, the reset member butts the piston, and the first butting portion and the second butting portion are kept close to each other so as to achieve a braking effect.

Abstract: A ball-and-ramp mechanism of a thrust generator includes a rotary ramp member and a rectilinear ramp member, each having a plurality of sloped grooves sloped along a circumferential direction and having an arcuate diametrical cross-section, and a spherical member interposed between the sloped grooves of the ramp members to transmit force from the rotary ramp member to the rectilinear ramp member. Each of the sloped grooves has regions varying in the curvature radius of the diametrical cross-section in a track area where the spherical member contacts the sloped groove. Accordingly, it is possible to improve the durability of the rotary ramp member and the rectilinear ramp member.

Abstract: The present invention makes it possible to increase safety of parts and ensure durability and smooth operability in braking by increasing axial stiffness of a motor while keeping the spring effect of connecting springs driving an upper wedge with force from the motor.

Abstract: Disclosed is an electric disc brake capable of reducing noise and vibration while expanding the life span of the product. The electric disc brake includes a caliper housing to press friction pads provided at both sides of a disc against the disc, a cylinder installed in the caliper housing, a piston moving back and forth in the cylinder to press the friction pads, a driving device generating driving force with respect to the piston, and a volume compensation part communicated with the cylinder to compensate for an increment of a volume of the cylinder according to movement of the piston.

Abstract: A braking system comprising a reconfigurable caliper piston adapted for, and a method of, retracting a brake pad utilizing active material actuation.

Abstract: An electric brake device includes a brake pad, an axial force sensor and a controller. The brake pad is pressed against a rotation face of a brake rotor in a direction perpendicular to the rotation face. The axial force sensor detects a pressure of the brake pad. The controller performs a speed reduction control which is an operation target, based on at least one of the pressure of the brake pad and a reduced speed obtained from a wheel speed sensor.

Abstract: The invention relates to a brake device for braking a moving brake body (2) by means of pressing a brake element (3, 4) onto the brake body (2), wherein a conversion device (7) is provided for converting a rotational movement of a brake drive shaft (9) into a translational movement of the brake element (4) in the direction of the brake body (2), wherein a rotary percussion mechanism (8) is connected between the brake drive shaft (9) and the conversion device (7).

Abstract: A disk brake device has a rotor having a braking surface, a caliper, an outer pad and an inner pad each disposed to face the braking surface, and a braking operation mechanism which performs an operation of pressing the two pads against the braking surface. The braking operation mechanism includes a base plate, a wedge plate which holds the inner pad, a first movement conversion mechanism which moves the wedge plate in a direction perpendicular to the braking surface, while moving the wedge plate to slide relative to the base plate in a rotating direction of the rotor in parallel to the braking surface, an electric motor unit which outputs a rotational driving force, and a second movement conversion mechanism which moves, using the rotational driving force of the electric motor unit, the wedge plate to slide in the rotating direction of the rotor in parallel to the braking surface.

Abstract: A pneumatic or electromagnetically actuated disc brake includes a caliper spanning a brake disc, a brake application unit disposed in the caliper and having a brake lever, at least one actuating spindle axially displaceable by the rotary lever, and a wear adjustor actuated by the brake lever and positioned in the brake caliper, by which a wear-induced change in an air gap between a brake pad and the brake disc can be substantially compensated for by way of an axial adjustment of the actuating spindle. The wear adjustor includes a spur gear segment extending in the pivot direction and disposed on the lever and engaging with a crown gear operationally connected to the actuating spindle for adjusting.

Abstract: A caliper brake including a housing and a rotating actuator received in a bore in the housing, the rotating actuator having a head positioned within the housing and an outer tapered surface located outside the housing. A lever includes a bore with an inner tapered surface that mates with the outer tapered surface of the rotating actuator. A threaded nut is received over a threaded end portion of the rotating actuate and applies pressure to the lever to rotationally secure it to the rotating actuator. An inner stator is positioned adjacent to the head of the rotating actuator and an outer stator is spaced from the inner stator, the stators being axially movable. A plurality of ramped depressions are provided in both the head and in a backing plate of the inner stator, and a ball is positioned between each of the ramped depressions.

Abstract: The annular disk brake comprises a rotor disk and at least one brake pad provided on each side of the rotor disk. The brake pad or pads on one side are connected to a substantially axially-guided brake pad carrier. The brake has a force transmitting arrangement creating a force increasing amplification between an axially-actuated member and the carrier. This arrangement can increase the brake compactness and provide an even distribution of the braking force around the circumference of the rotor disk. A method of increasing a brake pad clamping force is also disclosed.

Abstract: The invention relates to an electric parking brake, comprising a motor-gearing unit (2) with a drive output shaft (3), wherein the motor-gearing unit (2) generates a rotation of the drive output shaft (3), and comprising a spindle device (4) having a spindle (5) and a nut (6), wherein the spindle device (4) converts the rotation of the drive output shaft (3) into an axial movement of the nut (6) in the axial direction (X-X), wherein the spindle (5) is connected in a positively locking manner to the drive output shaft (3), the spindle (5) is centered on the drive output shaft (3), and the spindle is mounted in a brake caliper (7).

Abstract: A rim brake having a right arm and a left arm respective with one upper and one lower longitudinal portion separated from one another by a pivot bearing. The lower longitudinal portion is provided for holding a brake pad and the upper longitudinal portion engages with at least one hydraulic cylinder through a wedge element. The hydraulic cylinder is disposed between the right arm and the left arm and is configured to move the wedge element. A method for the installation of a hydraulic brake having a master unit and a slave unit connected to a hydraulic line is also provided.

Abstract: An electric brake system includes a plurality of planetary rollers kept in rolling contact with the radially outer surface of a rotary shaft, a carrier which is restrained from axial movement, an axially movable outer ring member, and a friction pad provided at the axially front end of the outer ring member. The rotation of the rotary shaft is converted to axial movement of the outer ring member, thereby pressing the friction pad with the outer ring member. The brake system further includes a reaction force receiving member provided axially rearwardly of the outer ring member for receiving an axial rearward reaction force applied to the outer ring member when the friction pad is pressed by the outer ring member. A displacement sensor measures the displacement of the reaction force receiving member, thereby detecting the pressing force of the friction pad.

Abstract: In an electric linear motion actuator, planetary rollers 7 rotatably supported on their radially inner surfaces by respective support pins 6b are radially inwardly biased by radially compressible ring springs 18 enveloping the support pins 6b, thereby biasing and pressing the respective planetary rollers 7 against the radially outer surface of a rotary shaft 4. Thus, it is possible to stably transmit torque of the rotary shaft 4 to the respective planetary rollers 7 without applying a preload to the planetary rollers 7 with a negative gap between the radially outer surface of the rotary shaft 4 and the radially inner surface of the outer ring member 5.

Abstract: A locking device for locking a displaceable motor vehicle part which is lockable by the means of the locking device within a displacement range in a respective rest position reached by displacement is provided. The locking device comprising a braking device with at least two braking elements which interacts in a braking manner in a respective rest position of the motor vehicle part in order to lock the motor vehicle part. An actuator is assigned to the locking device, which is optionally combinable with the braking device and with which a displacement movement of the motor vehicle part is brakable for locking the motor vehicle part. The actuator is operatively connected independently on the braking device with a component which can be moved by displacement of a motor vehicle part so that a displacement movement of the displaceable motor vehicle part is brakable by the action of an actuator on the component.

Abstract: A cam housing assembly oscillates in association with rotation of an eccentric cam which is attached to a camshaft and is allowed to press a clutch by cam pins of the cam housing assembly. A pair of piston assemblies are provided of which each includes a piston which can slide within a sleeve, a spindle and a nut which screws on to the spindle and are supported in hole portions in a caliper body so as to oscillate therein, whereby a brake pad is pressed against by a plug after the spindle, the nut and the piston are sequentially pressed by pressing a clutch by the cam pins. Since the spindle and the nut are screwed on to each other through a reversible screw, a gap is adjusted automatically as the pad wears.