An electromechanical-hydraulic piston actuator providing pressurized pressure medium for a brake system of a vehicle, including an electric motor having a stator and a rotor, a rotation-translation mechanism driven by the electric motor and which has a rotatable threaded nut and a threaded spindle prevented from rotating and displaceable in its axial direction, a piston coupled with the threaded spindle in the axial direction thereof, a hydraulic cylinder having a hydraulic chamber filled with pressure medium into which the piston is displaceable from a rear piston position towards a forward piston position to pressurize the pressure medium and/or expel it from the chamber. A hydraulic connection is connected to the chamber via which pressure medium can be expelled from the chamber. An isolation device is provided for the piston-travel-controlled isolation of the rotational coupling between the rotor of the electric motor and the threaded nut.

A damping system for a linear actuator, and a linear actuator. The damping system has a first sub-assembly with a first axial stop surface and a second axial stop surface. A spring-elastic spring arrangement has an initial position at a predetermined pretensioning and is axially in contact with the first and second stop surface. A second sub-assembly is mounted axially displaceable relative to the first sub-assembly and is configured to lift the spring arrangement away from the first stop surface or from the second stop surface in the case of an axial movement relative to the first sub-assembly.

An actuator assembly may comprise a screw shaft having a shaft axis; a drive arrangement pivotally supported about the screw shaft axis for driving the screw shaft, e.g., about the shaft axis or along the shaft axis, and a rod mounted to the drive arrangement at a location off the shaft axis for providing a primary function of reacting torque about the shaft axis on the drive arrangement. The rod may comprise a rod axis and provide a load path along the rod axis for reacting torque. The rod may also comprise a device for which provides a secondary function for the actuator assembly based on the load experienced along the load path provided by the rod.

An actuator includes a housing, an extension arm, and a threaded spindle. The threaded spindle is mounted on the housing in such a way as to be rotatable with respect to an axis of rotation by a first rotary bearing. The extension arm projects out of the housing in such a way that it can be moved in a direction of the axis of rotation. The housing and the extension arm together delimit an internal space, the volume of which changes when the extension arm moves. A first end of the threaded spindle that is remote from the first rotary bearing, projects into a tubular section of the extension arm, irrespective of a position in which the extension arm is situated. The tubular section extends with a constant internal cross-sectional shape along the axis of rotation.

A linear drive comprising an electric motor driving a worm, a worm gear which meshes with the worm and which is connected non-rotatably to a spindle extending along a linear drive longitudinal axis or axis of rotation and which has a rear and a front end. The worm gear has a bearing seat for a rear bearing, with which the worm gear is mounted in a surrounding transmission housing. To simplify the manufacture of such a linear drive the invention proposes that the rear bearing is in the form of a fixed bearing, the spindle comprises a weldable material, a securing disk is arranged on the rear end of the spindle and the securing disk is connected to the spindle in bonded-material relationship.

A piezoelectric motor includes a driven body configured to rotate around a rotation axis, a first piezoelectric vibrator configured to transmit a driving force to the driven body, a moving mechanism configured to move the first piezoelectric vibrator in directions approaching and separating from the rotation axis, and a second piezoelectric vibrator configured to transmit a driving force to the moving mechanism. The moving mechanism includes a screw shaft disposed along the directions and configured to rotate around an axis with the driving force of the second piezoelectric vibrator and a holding section configured to screw with the screw shaft and hold the first piezoelectric vibrator.

A steering column assembly includes a lower jacket. The assembly also includes an upper jacket in telescoping engagement with the lower jacket. The assembly further includes a telescope actuator assembly comprising a nut translatable along a lead screw. The assembly yet further includes a telescope drive bracket having a base portion and a pair of arms extending from the base portion, the pair of arms each defining a slot with a respective slot surface, wherein the nut is disposed within the slots in an assembled condition to move the upper jacket in a telescope direction relative to the lower jacket. The assembly also includes a first pair of anti-rotation features disposed on the slot surface of a first arm of the pair of arms.

An actuator includes a housing, an extension arm, and a threaded spindle. The threaded spindle is mounted on the housing in such a way as to be rotatable with respect to an axis of rotation by a first rotary bearing. The extension arm projects out of the housing in such a way that it can be moved in a direction of the axis of rotation. The housing and the extension arm together delimit an internal space, the volume of which changes when the extension arm moves. A first end of the threaded spindle that is remote from the first rotary bearing, projects into a tubular section of the extension arm, irrespective of a position in which the extension arm is situated. The tubular section extends with a constant internal cross-sectional shape along the axis of rotation.

A steering column assembly includes a lower jacket. The assembly also includes an upper jacket in telescoping engagement with the lower jacket. The assembly further includes a telescope actuator assembly comprising a nut translatable along a lead screw. The assembly yet further includes a telescope drive bracket having a base portion and a pair of arms extending from the base portion, the pair of arms each defining a slot with a respective slot surface, wherein the nut is disposed within the slots in an assembled condition to move the upper jacket in a telescope direction relative to the lower jacket. The assembly also includes a first pair of anti-rotation features disposed on the slot surface of a first arm of the pair of arms.

A drive assembly of a motor vehicle for the motor-driven adjustment of a flap, in particular a side door, of the motor vehicle by means of linear drive movements, wherein the drive assembly has a drive unit for generating the linear drive movements, which is assigned a drive with at least one drive motor and a feed transmission, in particular a spindle/-spindle nut transmission, that is drivingly connected to the drive. The drive assembly has a support structure which receives the drive unit such that it can swivel about a geometric supporting swivel shaft, such that the drive unit and the support structure are connected to form a pre-assembly unit which can be mounted as such via the support structure in a mounting position on the motor vehicle, in particular on the flap or on the motor vehicle body.