An actuator assembly having an actuator, a worm gear, a first gear unit, a second gear unit, and a biasing member. The actuator may rotate the worm gear, first gear unit, and second gear unit in first rotational directions while the biasing member may rotate the worm gear, first gear unit, and second gear unit in second rotational directions.

A gear for an adjusting device in vehicles for adjusting two vehicle parts adjustable relative to each other, in particular, for adjusting two parts of a seat adjusting device, a window lifter, or a sun roof, the gear including a drivable drive screw having gear teeth, a spindle nut, which has spindle nut teeth engaging with the screw teeth, and an internal thread, using which the spindle nut can be brought into engagement with a threaded spindle of the adjusting device, and a gear housing, which accommodates and supports the drive screw and the spindle nut. The spindle nut is made at least partially of metal, and the drive screw is made of plastic, and the gear housing includes a first bearing section made of plastic for supporting the spindle nut and a second bearing section made of metal for supporting the drive screw.

The present invention relates to a speed reducer for a vehicle. The speed reducer includes: a first coupler having, on one side thereof, a first coupling portion, to which a motor shaft or a worm shaft is coupled, and, on the other side thereof, a plurality of first protrusions, which are spaced apart from each other in a circumferential direction while protruding in an axial direction, in which the first protrusions are formed in a manner in which a circumferential width of each of the first protrusions is narrowed toward an inner side from an outer side so as to form a first outer support portion as a radial outer end and a first inner support portion as a radial inner end; and a second coupler configured to be coupled to the first coupler to transmit a rotational force to the first coupler.

A drive device (1) for motorized actuation of a functional element of a motor vehicle has an electric motor (2) with a motor shaft (3) and also has a worm shaft (4) of a worm gearing. A first end of the worm shaft is connected to the motor shaft (3) and a second end is received in a radial bearing (5). The radial bearing (5) has a bearing body (21) with an outer surface mounted in a housing (11) and at least one annular bearing element (24) is mounted to the worm shaft (4). The bearing element (24) is elastic at least in a partial region to ensure compensation for tolerances in the region of the radial bearing.

There is provided a method of assembling a worm reducer, which includes causing a worm wheel to be rotatably supported in a wheel accommodation part, externally fitting a pair of bearings at tip-side and base-side positions of a worm, inserting the worm into a worm accommodation part from an opening side thereof at a state where the worm is offset outward in a radial direction of the worm wheel with respect to a center axis of the worm accommodation part, causing the bearing which is externally fitted to a leading side in an insertion direction of the worm to pass an outer diameter-side of a part of an outer peripheral edge of the worm wheel, which protrudes most into the worm accommodation part, causing the worm teeth to mesh with the worm wheel, and further inserting the worm to a predetermined position in the worm accommodation part.

According to one exemplary embodiment of the present invention a worm shaft subassembly for supporting a worm shaft is provided. The worm shaft has a worm shaft radial load, a worm shaft axial load, and a worm shaft axial travel. The worm shaft subassembly includes at least one damping member to support the worm shaft axial load. The at least one damping member has at least one damping member axial load. The at least one damping member limits the worm shaft axial travel. The worm shaft subassembly also includes a bearing to support the worm shaft radial load and the at least one damping member axial load.

On one side of a worm wheel (46) in an axial direction, first thinned portions (46e) recessed toward the other side of the worm wheel (46) in the axial direction are arranged. Further, on the one side of the worm wheel (46) in the axial direction, reinforcing portions (46h) reinforcing areas between the first thinned portions (46e) and tooth portions (45) of the worm wheel (46) are arranged. Therefore, it is possible to reduce a weight of the worm wheel (46) and to suppress occurrence of distortion of the tooth portions (45) by the first thinned portions (46e). In addition, it is possible to sufficiently increase the strength of the worm wheel (46) in the vicinity of the tooth portions (45) by the reinforcing portions (46h).

Disclosed herein is a reducer for an electronic power steering apparatus, which includes a gear housing including a worm shaft housing and a worm wheel housing, the gear housing being made of a heat conductive material, a worm wheel shaft connected to a steering shaft to rotate along with rotation of the steering shaft, a worm wheel accommodated in the worm wheel housing, and having a first surface and a second surface facing the first surface, the worm wheel shaft being coupled to the worm wheel, a first heat transfer plate provided to come into contact with the first surface of the worm wheel, and a first bearing coupled to the worm wheel shaft to come into contact with the first heat transfer plate, and having an outer peripheral surface coming into contact with the worm wheel housing.

A gearbox includes a first divided body and a second divided body, and a shaft projection is formed on and a through-hole is formed in divided surfaces of the first divided body and the second divided body. A second recess on the second divided body side includes a second arc portion formed concentrically with an axis center of a worm wheel, and an upper linear portion and a lower linear portion which extend linearly toward the first divided body side from both ends of the second arc portion. A first recess on the first divided body side includes a first linear portion which extends linearly in a direction orthogonal to an intersecting direction, and an upper arc portion and a lower arc portion which are formed continuous to both ends of the first linear portion.

An optical device including a lens and a control member configured such that motion of the control member produces a change in the optical power provided along an optical axis of the lens. The optical device further includes a framework, a motor and a driving member. The motor includes an output shaft rotatively coupled to said driving member. The motor and the control member are mounted in the framework such that the driving member and the control member mechanically cooperate. The driving member is rotatably mounted in the framework. The optical device comprises biasing means for maintaining the driving member in a predetermined axial position along the output shaft axis and relative to the framework. This optical device can be used in an optometric equipment.