This disclosure relates to an electric actuator to render optical elements movable. The electrical actuator generally has a motor, a mechanical transmission assembly having an endless screw, a support element of the endless screw, a drive mechanism, and a return mechanism. The motor is configured to drive the mechanical transmission assembly and the mechanical transmission assembly is configured to drive the drive mechanism, wherein the return mechanism exerts an axial pressure against the endless screw in such a way as to press the endless screw against the support element. The disclosure also relates to an assembly having a movable optical element and an electric actuator of the movable optical element as described above.

One method for running in a worm gear of an electromechanical steering system may comprise preparing the electromechanical servo steering system in a preassembled state in which one end of a worm shaft close to a motor or an end remote from the motor is mounted rotatably in a bearing in the gear housing and the respective other end of the worm shaft is movable in a radial direction so as to form a free end; rotatably mounting the free end of the worm shaft in an adjustable pretensioning device that is configured to pretension the worm shaft in a direction of the worm wheel in the engagement; adjusting the pretensioning device by way of a control device for generating a defined pretensioning of the engagement; and driving the worm shaft as a function of the control device at a defined rotational speed for a determined period of time.

An urging member urges a first end of a worm shaft toward a worm wheel via a first bearing. The worm shaft includes a tooth flank forming portion and a non-tooth flank forming portion formed between the first end and the tooth flank forming portion. In a housing, a shaft housing portion that houses the worm shaft includes a substantially straight portion and a reduced diameter portion. The substantially straight portion has a substantially constant bore diameter, and extends in an axial direction of the worm shaft. The reduced diameter portion is arranged on the first end side with respect to the substantially straight portion, and has a bore diameter reduced from a position that overlaps tooth flanks in the axial direction to a position that overlaps the non-tooth flank forming portion in the axial direction.

The invention relates to a device (4) for positioning meshing teeth (3, 8, 9) of a gear drive without any play, comprising a gear assembly (5), which gear assembly (5) comprises a main gear (6) having first teeth (8) and a gear (7) that is rotatable relative thereto in the circumferential direction having second teeth (9), and the main gear (6) comprises a hub part (10) on which the rotatable gear (7) is disposed, and a tolerance compensating element (12) comprising a shaft part (13) and a compensating part (14) is disposed radially underneath the main gear (6), and the compensating part (14) is connected to the shaft part (13) and to the hub part (10) of the main gear (6) so that the main gear (6) is connected exclusively via the compensating part (14) to the shaft part (13), and the compensating part (14) is made at least partially from a rubber elastic material.

A pin and carrier locking assembly is described for locking a pin and carrier in position relative to each other. The carrier has first and second opposing arms, each comprising a bore therein and the axial ends of the pin are positioned within these opposing bores of the carrier. The assembly further comprises a hollow bearing provided around and coaxially with said pin and between said first and second arms. The bearing is positioned so as to not contact the first arm of the carrier but to contact the second arm of the carrier and a washer is positioned between the bearing and the first arm of the carrier so that a first section of the washer makes a first contact area with the first arm of the carrier.

A speed reducer includes two intermediate lines for a turboprop engine, the reducer including: an input line including an input shaft bearing an input gear wheel, a first intermediate line including a first intermediate shaft bearing a first intermediate gear wheel, a second intermediate line including a second intermediate shaft bearing a second intermediate gear wheel, a spring held by a frame, the spring surrounding a longitudinal portion of the input shaft in order to allow a movement of the input gear wheel towards an equilibrium position corresponding to an equal distribution of the transmission of the power coming from the input shaft to the first intermediate shaft of the first intermediate line and the second intermediate shaft of the second intermediate line.

An X-ray imaging system includes a gantry, rotatable about an axis of rotation, a radiation source mounted on the gantry and configured to emit radiation, and one or more detectors configured to detect the emitted radiation. The gantry includes a gear assembly coupled to a motor to enable rotation of the gantry, wherein the gear assembly comprises a gantry gear. The gantry includes an encoder for detecting position of the gantry, wherein the encoder comprises an encoder gear meshed with the gantry gear. The gantry also includes a gear re-engagement assembly configured to couple to the encoder and to force the encoder gear into correct engagement with the gantry gear when the encoder gear becomes disengaged from the gantry gear. As such, the gear re-engagement assembly keeps engagement of the encoder gear and the gantry gear to maintain the important gantry position tracking.

In a worm reducer, an elastic member urges a worm shaft housed in a housing toward a worm wheel. In a method for manufacturing the worm reducer, the elastic member is arranged in a recess formed on the inner face of the housing. Then, a jig is inserted into the housing, and the elastic member is compressed by the jig. In the state in which the elastic member is compressed by the jig, the worm shaft is inserted into the housing. Then, the jig is removed from the housing.

The present embodiments relate to a rack bar supporting device of a vehicle steering apparatus, which may include: a support yoke configured to be inserted into a cylinder of a gear box and configured to have a support recess famed on a front surface thereof to support a rack bar positioned in the lateral direction therein and a yoke hollow formed on a rear surface thereof so as to receive an elastic member; a yoke plug configured to have a plug hollow famed on a front surface thereof to receive the elastic member for supporting the support yoke toward the rack bar and configured to be connected to the cylinder of the gear box; and damping members configured to protrude from a rear surface of the support yoke so as to be supported by a front surface of the yoke plug when an impact load is reversely transferred from the road surface through the rack bar.

A tilting structure for providing a force for tilting a worm shaft of an electric power steering apparatus to a worm wheel includes: a guide block which is inserted into an insertion space of a housing of the electric power steering apparatus; an elastic member which is disposed within the guide block; and a plug which is movably disposed within the guide block and is elastically supported by the elastic member to exert a tilting force to a bearing which supports the worm shaft. The plug and the guide block are configured to be able to be connected to one another via a thread coupling.