A seat component adjustment actuator (1) comprises a housing, an electric motor (5), and a gearing (10) coupled to the electric motor (5) and comprising at least three worm transmission stages (11-16). A first worm transmission stage (11, 12) comprises a first worm (11) and a first worm gear (12) engaged with the first worm (11). A third worm transmission stage (15, 16) comprises a third worm (15) and a third worm gear (16) engaged with the third worm (15). The first worm (11) is supported in the housing such that the first worm (11) is rotatable about an input rotation axis. The third worm gear (16) is supported in the housing such that the third worm gear (16) is rotatable about an output rotation axis which is transverse to the input rotation axis.

A gearbox for use in an electric power assisted steering system of the kind in which a motor is connected to a portion of a steering mechanism through the gearbox, comprises a housing, a worm gear carried by a worm shaft and a gear wheel carried by an output shaft, the worm shaft being supported relative to the housing by a tail bearing assembly, in which the bearing assembly is located relative to the gearbox housing by a bearing carrier, the carrier comprising a bearing carrier part which is fixed to the bearing assembly and a reaction part which is fixed to the gearbox housing, the bearing carrier part being connected to the reaction part by at least two connecting elements, the two elements being spaced apart so that they act, in effect, with the bearing carrier part and the reaction part to form a parallelogram linkage that enables the bearing carrier to be relatively free to move relative to the reaction part in one direction whilst being relatively restrained from movement in the two directions orthogonal to that direction.

A power transmission device is provided which can avoid an increase in pressure applied to bearings even when a dimension of thickness of a case is small or when a gear supported by a rotary shaft has a large dimension of diameter. The power transmission device includes: a hollow rotary shaft; a first case configured to support one end portion of the rotary shaft via a first bearing; a second case configured to support the other end portion of the rotary shaft via a second bearing; a shaft component disposed on an inner side of the rotary shaft; a first fixer configured to fix one end portion of the shaft component to the first case; and a second fixer configured to fix the other end portion of the shaft component to the second case.

A steering assembly including a motor assembly, a worm assembly, and a coupler assembly is provided. The worm assembly includes a worm member defining a central axis and having first and second ends. The coupler assembly may include an adapter having a first wall defining a through-hole sized to receive a portion of the first end therein. The coupler assembly may operatively connect the motor assembly and the worm assembly. The worm member and the adapter may be arranged with one another such that pressing a swedge tool against a face of the worm member in a direction substantially parallel with the central axis deforms the first end to overlap a portion of the worm member onto a portion of the adapter adjacent the through-hole to secure the worm member and adapter to one another and to axially retain the worm member in a position relative to the central axis.

The present embodiments relates to a reducer of an electric power steering device. An embodiment of the present embodiments provides a reducer of an electric power steering device, including: a worm shaft having a first worm shaft bearing and a second worm shaft bearing coupled to one end portion, which is connected to a motor shaft, and to the other end portion, which is opposite thereto, respectively; a gear housing that contains the first worm shaft bearing, the second worm shaft bearing, and the worm shaft; and a support member coupled to the inner peripheral surface of the hear housing so as to support the outer race of the second worm shaft toward the worm wheel and filled with a viscoelastic fluid.

In a transmission housing unit having a housing base body for a shaft, which is supported with a compensating arrangement between a second end face and a second guide surface. The compensating arrangement has an axial disk. The axial disk and the housing base body have corresponding geometric unbalances in accordance with the poka-yoke principle such that the axial disk is only insertable in a single orientation into the housing base body in the assembly condition.

In an actuator, which can be used, for example, for an electromotive parking brake, and the housing of which is equipped with a gear mechanism, axial and radial bracings of a worm member take place using a bearing bracket, the limbs of which, on both sides, engage the worm member from behind and reach radially beyond its shaft. As seizing protection against a wedging between the worm member and the worm wheel, the bearing bracket can be slightly displaced in the housing. For this purpose, by virtue of the restoring forces exerted by the spring elements, which are then tensioned, the bearing bracket together with the worm member is pushed axially and the worm wheel 20 is turned.

A noise reduction apparatus for an electric power steering system may include a worm wheel rotatably and integrally coupled to a steering shaft connected to a steering wheel; a worm gear shaft to be rotatably operated by rotational force of an electric motor and formed with a worm gear to be meshed with the worm wheel; a tilt bearing provided between the worm gear shaft and the electric motor to rotatably support one end of the worm gear shaft; a support bearing for rotatably supporting the other end of the worm gear shaft; a plurality of pressing pins for pressing the support bearing; and a plurality of elastic members for elastically supporting the plurality of pressing pins respectively.

An apparatus to lower or raise landing gear on a trailer or semi-truck comprising a tool having a center body with a coupling device and a power coupling that is selectively engageable with a rotatable projection on the landing gear. The power coupling is operatively engaged with a worm gear within the center body and thereby with the coupling device. A powered drill is engaged with the power coupling and is actuated to rotate the power coupling in a first direction or in a second direction. The power coupling rotates the worm gear, which rotates the coupling device and thereby the projection on the landing gear. Rotation of the projection in one direction lowers the landing gear. Rotation of the projection in the opposite direction raises the landing gear. The user selects to raise or lower the landing gear simply by causing the drill chuck to rotate clockwise or counter-clockwise.

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.