A method for manufacturing a mechanical reducer for an aircraft turbomachine including a central pinion, an outer crown, N planet pinions, where N≥3, each planet pinion including a first stage meshing with the central pinion, and a second stage meshing with the outer crown, the method including the assembly marking, wherein N teeth of the central pinion are marked, and N pairs of teeth of the first stage of each planet pinion are marked, the N planet pinions each being marked identically, and the assembly of the mechanical reducer, so that the teeth of the pairs of marked teeth of the first stage of each planet pinion are disposed on either side of a marked tooth of the central pinion.

A method of mounting a motor to a gearbox includes positioning a coupling along an input shaft of the gearbox from a starting position to a first alignment position. In the starting position, the coupling drivingly engages a greater portion of the gearbox input shaft than in the first alignment position. In the first alignment position, the coupling operatively contacts the motor output shaft. Another step includes rotating the coupling so that the coupling aligns with the motor output shaft. Another step includes axially positioning the coupling at a second alignment position such that the coupling drivingly engages both the motor output and the gearbox input shafts. Another step includes positioning the motor to allow mounting of the motor on the gearbox with the coupling at a third alignment position drivingly engaging a greater portion of the motor output and the gearbox input shafts than in the second alignment position.

A clutch is configured to mechanically establish and disestablish a torque transmission path between an input shaft through which a torque is input and an output shaft through which the torque is output. The clutch includes a sun gear, an internal gear, planetary gears, and a carrier. The sun gear is configured to switch between a fixed state and a non-fixed state. The internal gear is coupled to the input shaft in a torque transmittable manner. The planetary gears are configured to mesh with the sun gear and the internal gear. The carrier is coupled to the output shaft in a torque transmittable manner and configured to support the planetary gears rotatably. The carrier includes a coupling portion to be coupled to a detachment member configured to detach the carrier from the clutch.

An operation device includes a main body, a lifting and lowering mechanism unit movably supported with respect to the main body and including a driven portion configured to receive driving force for movement of the lifting and lowering mechanism unit, a driving unit attached to the main body and configured to drive the lifting and lowering mechanism unit by a driving pin provided on a rotation gear. The lifting and lowering mechanism unit includes a groove portion into which the driving pin is accommodated by rotation of the rotation gear when the driving unit is mounted on the main body.

A gear drive device includes a first gear, and a second gear that meshes with the first gear to allow torque transmission. At least one of the first gear and the second gear includes a fan-type gear. The first gear and the second gear each include a guide portion, and the guide portion is configured to position the first gear and the second gear in a gear rotation direction upon installation thereof.

A spindle drive assembly for opening and/or closing a vehicle hatch is described. This comprises a spindle extending along a spindle drive axis and a spindle drive motor coupled to the spindle in terms of drive, the motor shaft of which is arranged substantially coaxially with respect to the spindle drive axis. The spindle drive motor is coupled to the spindle via a two-stage epicyclic gearing. Furthermore, a vehicle hatch with such a spindle drive assembly is presented. A method for installing an epicyclic gearing of such a spindle drive assembly is additionally specified.

A gear device includes: a housing cover having an annular shape and including a center opening configured to dispose a connection shaft for a gear, the housing cover being disposed at one end portion of a housing in an axis direction, the housing having a cylindrical shape and configured to house the gear. At an outer surface of the housing cover, an assembling mechanism configured to detachably assemble another housing cover is provided.

A pulley device for a belt that includes an eccentric adjusting member fixed on a support, an eccentric hub rotatably mounted on the eccentric adjusting member, a torsion spring between the eccentric adjusting member and hub to exert a biasing force, and a pulley rotatably mounted on the hub. The hub provides an upper radial surface and the eccentric adjusting member provides a radially outwardly projecting flange formed at an upper end of the eccentric adjusting member and forming an axial abutment for the upper radial surface. The upper radial surface provides a pair of axially projected stops formed integrally within, each stop being dedicated to come into abutment against a corresponding stop provided by the radially outwardly projecting flange of the eccentric adjusting member. The hub further provides engaging means adapted to cooperate with an external tool, the engaging means circumferentially located between the projected stops of the hub.

The invention proposes a planet carrier (50) for a planetary gear train of a reducing mechanism of an electromechanical actuator for actuating a parking brake of a motor vehicle, which carries planet pinions (52), each of which is accommodated between two parallel support plates (56, 58) belonging to a reinforcement (54) of the planet carrier and each of which is mounted in rotation on the planet carrier (50) about a rotation guide pin (74) that is mounted between the two support plates (56, 58) to which it is linked by the two opposing axial ends thereof, characterized in that each rotation guide pin (74) is a tubular pin.

A method for producing a bearing assembly for mounting a control shaft, for example a camshaft, may include: providing a bearing; arranging at least two rings on respective axial front sides of the bearing; pushing the bearing together with the at least two rings onto an assembly mandrel; pre-tensioning the at least two rings against the respective axial front sides of the bearing; at least one of (i) pushing a shrink hose over the bearing and the at least two rings and heating the shrink hose, and (ii) winding a film strip over the bearing and the at least two rings; and withdrawing the assembly mandrel.