The disclosure relates to a drive device (V) for producing a translational motion of a movable tappet (8) by means of an electromagnetic rotating machine. The drive device includes an inner rotor (4) and an outer coaxial stator (5) and has a movement-thread pair integrated coaxially in the stator. The movement-thread pair comprising a lead screw (6), which is coupled to the rotor for conjoint rotation, and a threaded nut (7), which is linearly guided in a stator sleeve (2) in a rotationally fixed manner and is rigidly coupled to the tappet. The rotor is guided for rotation around the stator and a torque being transferred from the rotor to the lead screw by means of a thin-walled flange (10). A rotational fixation (11) of the threaded nut in the cavity of the stator sleeve is provided as a result of interlocking joining of the two.

The valve operator assembly is provided for a valve and comprises a housing 18, an input member 20 rotatably mounted, and a transmission mechanism 22 comprising a translating element 24 and a rotating element 28 connected to the input member, said transmission mechanism being adapted to convert applied rotation of the input member into axial translation of said translating element.

The assembly further comprises at least one locking mechanism 23 radially interposed between the transmission mechanism 22 and the housing 18, and provided with friction means 82 freely movable in circumferential direction relative to the transmission mechanism and to the housing and with one freewheel 80 comprising a plurality of locking members mounted in radial contact with a track of said friction means, the freewheel and the friction means cooperating together to lock the transmission mechanism 22 with the housing 18 in a static position of said assembly.

Disclosed is an actuator capable of imparting a linear, rotary, or combined roto-linear force. In one embodiment, the actuator has a rotor and a stator, each having helical grooves with a thrust ball occupying the grooves. A nose piece is situated at the end of the actuator and can be attached to other equipment. The actuator is electrically controlled and can be used in applications requiring high forces or other specialized environments.

A lifting column includes a component having an internal thread, as well as a hollow shaft having an external thread, which is in engagement with the internal thread of the component. A threaded spindle is disposed inside the hollow shaft and has an external thread, which is in engagement with an internal thread of the hollow shaft. Furthermore, the lifting column includes a drive device configured to rotate the hollow shaft relative to the threaded spindle and the component. When the hollow shaft rotates, the component and the hollow shaft move in the same axial direction so that the height of the lifting column is changeable.

Actuator for actuating a valve device comprising an electric drive (14) being operatively engaged to an actuating element (1) of the valve device, the electric drive (14) comprising at least one torque motor (2) which drives a hollow shaft (3) as an internal rotor, that positions a threaded drive (4) having a screw nut (6) and a threaded spindle (5) for converting the rotational movement of the hollow shaft (3) into a translational movement of the threaded spindle (5), and the threaded spindle (5) acts upon the actuating element (1) for displacing the same, wherein the threaded drive (4) comprises an inverted roller screw (4.1), and the screw nut (6) of the inverted roller screw (4.1) houses the threaded spindle (5) as a push rod.

A hand-held power tool having a motor, a cutting member and a transmission linking the cutting member to the motor, the motor and the transmission being housed in a main housing, the transmission having a ball screw/nut mechanism with a screw and a nut, one of the screw and the nut being rotatably engaged with the motor, and the other of the screw and the nut being linked to the cutting member. The tool has a protective housing for protecting the ball screw/nut mechanism, separate from the main housing, and a sliding seal cooperating with an inner face of the protective housing, the sliding seal being driven by one of the nut and the screw linked to the cutting member, the sliding seal being rigidly connected respectively to one of a sleeve covering the nut and a cap protecting the screw.

A motor rotor-blank assembly for a motor is provided. The rotor-blank assembly includes a rotor including a plurality of rotor anti-rotation features; and a blank having a hollow core and including a plurality of blank anti-rotation features corresponding to the rotor anti-rotation features, wherein the rotor anti-rotation features and the blank anti-rotation features work in conjunction to maintain the blank fixed within the rotor during rotation of the rotor.

A linear electro-mechanical actuator includes a containment structure (2), a nut (5) positioned in the containment structure (2), a screw shaft (6) inserted in the nut (5) and interconnected with the nut (5) via a helical recirculating ball coupling, and an anti-rotation mechanism (9) positioned inside the screw shaft (6) to prevent the screw shaft (6) from rotating about the axis (X). The anti-rotation mechanism (9) includes a guide unit (10) fixed cantilever-style to the containment structure (2) and connected to the screw shaft by a non-rotational coupling.

Apparatuses and methods of operating a linear differential (100, 600) are described herein. The linear differential (100, 600) contains a slide portion (102) with parallel right-hand and left-hand threaded rods (112, 114). Threaded onto the right-hand and left-hand threaded rods (112, 114) and attached to the slide portion (102) are right-hand and left-hand gears (116, 118). Meshed between the right-hand and left-hand gears (116, 118) and also attached to the slide portion (102) is a driven gear (200). An end effector (104) is attached to the driven gear (200) and is configured to translate along a translation axis (110) and rotate around a rotation axis (120).

The present disclosure relates to a hollow-type BLDC motor of a power sliding device of a vehicle seat, and a nut coupled to a lead screw is injection-molded with a plastic and installed only on a longitudinal partial section of the inner diameter of a rotor, a magnet of the rotor is produced in an integrated cylindrical shape having no gap between magnetic poles, and a skew angle is given on a boundary line between the magnetic poles, thereby reducing noise and vibration.