A clutch assembly for a motor vehicle drivetrain for coupling coupling elements for conjoint rotation includes a clutch unit, a brake unit and at least one permanent magnet between the clutch unit and the brake unit. The clutch unit is shiftable into a coupling state in which the coupling elements are coupled to one another by shifting the clutch unit from a first position in which the coupling elements are decoupled into a second position in which the coupling elements are coupled. First and second electrically energizable coils are electrically energizable to move the permanent magnet from the first position into the second position or vice versa. A holding plate is located adjacent to the at least one permanent magnet to suppress magnetic flux from the at least one permanent magnet to the brake unit. A motor vehicle drivetrain containing at least one clutch assembly is also provided.

Provided is an electric actuator, including: a drive part (2); a motion conversion mechanism part (3) configured to convert a rotary motion from the drive part (2) into a linear motion in an axial direction in parallel to an output shaft of the drive part (2); and a lock mechanism part (7) configured to prevent drive by the motion conversion mechanism part (3). The lock mechanism part (7) includes: a rotary motor (64); and a lock member (60), which is driven by the rotary motor (64) so as to be brought into at least any one of a locking state of preventing the drive by the motion conversion mechanism part (3) and an unlocking state of releasing the locking state.

A hydraulic apparatus is disclosed, which includes a hydraulic cylinder body, a piston, a push assembly, and a first sealing component; the hydraulic cylinder body is of a hollow cylinder shape, provided with a first opening and a second opening respectively at two ends; the piston is disposed in the hydraulic cylinder body and is located at the first opening; the first sealing component covers the second opening; the hydraulic cylinder body, the piston, and the first sealing component are configured to form a hydraulic chamber; the hydraulic cylinder body is provided with a liquid flow opening which is located between the first sealing component and the piston; and the piston is configured to be enabled to move in the hydraulic cylinder body, driven by the push assembly.

A securing device for securing a standstill of a vehicle, including a securing body having a bearing device for a movable bearing on the vehicle between a securing position (SP) and a release position (FP), and a counter-securing body having a fastening portion for a force-transmitting fastening to a wheel shaft of the vehicle. The counter-securing body includes at least one form-fitting portion for a form-fitting latching of a pawl portion of the securing body in its securing position (SP) and a release of the pawl portion of the securing body in its release position (FP).

An actuator arrangement for operating a clutch and a parking lock in a driveline of a motor vehicle comprises: a clutch having a clutch actuating member configured to drivingly connect or disconnect a clutch input part and a clutch output part; a parking lock having a locking element movable to a locking position to lock a ratchet wheel, and to a release position to release the ratchet wheel; and a parking lock actuating member for actuating the locking element; a controllable actuator with a movable actuator setting member which is movable into at least three setting positions and is operatively connected to the clutch actuating member and to the parking lock actuating member such that in a first setting position the parking lock is closed, in a second setting position the clutch is closed, and in a third setting position the clutch and the parking lock are opened.

A device (1) for actuating a parking lock device (2) of an automatic transmission includes a piston (3) guided in a cylinder (5) and hydraulically displaceable counter to a spring force of an actuation spring (4). The piston (3) is form-lockingly fixable in a first position and in a second position by radially displaceable blocking elements (26) of a blocking device (15). The blocking elements (26) are radially displaceable by an actuation element (17). The radial displacement path of the blocking elements (26) and an operating condition of the actuation element (17) corresponding thereto in the first position of the piston (3) deviate from the radial displacement path of the blocking elements (26) and the operating condition of the actuation element (17) corresponding thereto in the second position of the piston (3).

The present application relates to a wheel braking mechanism, a frame and a child carrier. The wheel braking mechanism includes a wheel base housing assembly, a braking assembly mounted in the wheel base housing assembly, and a braking pin connected to the braking assembly. A side wall of the wheel base housing assembly is provided with a sliding hole configured to allow the braking pin to extend through. The braking pin is capable of sliding in the sliding hole between a locking position and an unlocking position. The wheel braking mechanism further includes a dust shield. The dust shield is engaged with the braking pin and shields the sliding hole to prevent external debris from entering an interior of the wheel base housing assembly through the sliding hole.

A wheel locking device comprising a number of interlocking components that are adapted to receive a wheel (or a wheeled apparatus), and said components can be adjusted to accommodate a variety of wheels of different diameters. The wheel locking device further comprises a rotatable and adjustable bar that is utilized to secure the wheel in place. In further embodiments, the device comprises a lock receiving bore which is adapted to receive a lock.

A commercial vehicle includes at least one driven axle, a service brake, at least one propulsion engine, and wheels. A parking brake function of the vehicle is achieved by a bistable locking means that acts on both wheels. A first and second multi-speed gearbox having respective first and second gear stages are each activated by an actuator and coupled to the wheels. The parking brake function is achieved at least in-part by concurrently activating the first and second gear stages. A computing device is configured to activate the bistable locking means when the commercial vehicle is at a standstill and configured to send a brake request via an electronic signal to an electronic brake control unit to activate the service brake.

System and method relates to a firewater monitor brake system, comprising a vertical locking disc collar adapted to be affixed externally or internally to a horizontal swivel of a firewater monitor system; a horizontal locking disc collar adapted to be affixed externally or internally to a vertical swivel of the firewater monitor system; a vertical brake mount adapted to be affixed to a horizontal swivel mounting pad of the firewater monitor system; a horizontal brake mount adapted to be affixed to a vertical swivel mounting pad of the firewater monitor system; a vertical brake system; wherein the vertical brake system is affixed to the vertical brake mount such that a portion of the vertical brake system is disposed around a portion of the vertical locking disc collar; a horizontal brake system, wherein the horizontal brake system is affixed to the horizontal brake mount such that a portion of the horizontal brake system is disposed around a portion of the horizontal locking disc collar; and a master cylinder adapted to be affixed to a tiller bar of the firewater monitor system, wherein the master cylinder is connected to and/or coupled to a lever system and wherein the master cylinder is connected to and or coupled to the vertical brake system and/or the horizontal brake system via an actuation system. Methods for making and using the system are also disclosed.