The speed reducer includes: a gear housing to enclose a worm wheel and a worm shaft and including one of a first magnetic member and a second magnetic member, which generate attractive force or repulsive force therebetween as current is applied to a position facing the worm shaft in an axial direction; a first bearing coupled to an end of the worm shaft at an opposite side to a motor shaft-coupling portion; and a moving member coupled, at one side thereof, to an outer race of the first bearing and including, at a remaining side thereof, a remaining one of the first and second magnetic members, so that the moving member is axially moved according to the attractive force or the repulsive force.

The speed reducer includes: a gear housing to enclose a worm wheel and a worm shaft and including one of a first magnetic member and a second magnetic member, which generate attractive force or repulsive force therebetween as current is applied to a position facing the worm shaft in an axial direction; a first bearing coupled to an end of the worm shaft at an opposite side to a motor shaft-coupling portion; and a moving member coupled, at one side thereof, to an outer race of the first bearing and including, at a remaining side thereof, a remaining one of the first and second magnetic members, so that the moving member is axially moved according to the attractive force or the repulsive force.

A transmission for a power train of a motor vehicle has a first stationary housing part having a first axial contact surface, a second stationary housing part, and a first sealing element on the second stationary housing part, the first sealing element being axially compressible. Additionally, the transmission includes a first planetary gear set including a planet carrier, at least one planet gear, a sun gear, and a ring gear. The planet carrier is fixed relative to one or both of the first stationary housing part and the second stationary housing part. One side of the planet carrier rests against the first axial contact surface, where the first sealing element acts on another side of the planet carrier to axially preload the planet carrier against the first axial contact surface to prevent the planet carrier from tilting relative to a rotation axis of the first planetary gear set.

A transmission for a power train of a motor vehicle has a first stationary housing part having a first axial contact surface, a second stationary housing part, and a first sealing element on the second stationary housing part, the first sealing element being axially compressible. Additionally, the transmission includes a first planetary gear set including a planet carrier, at least one planet gear, a sun gear, and a ring gear. The planet carrier is fixed relative to one or both of the first stationary housing part and the second stationary housing part. One side of the planet carrier rests against the first axial contact surface, where the first sealing element acts on another side of the planet carrier to axially preload the planet carrier against the first axial contact surface to prevent the planet carrier from tilting relative to a rotation axis of the first planetary gear set.

An output frame is connected to a portion of a radially outer portion of a carrier, the portion being closer to a front plate than to a rear plate. The carrier has a first region as an external force transmission path between front pin support surfaces and the output frame, and a second region as the external for transmission path between rear shaft support surfaces and the output frame, and a stiffness with respect to a twist force of the first region and a stiffness with respect to the twist force of the second region are equal to each other. In the front plate and the rear plate, a stiffness with respect to a radial tensile force applied to the front pin support surfaces and a stiffness with respect to the radial tensile force applied to the rear shaft support surfaces are equal to each other.

A reduction group for a vehicle and a reduction assembly including the reduction group are provided. The reduction group has a ring gear, a central sun gear, a planetary gear holder and at least one planetary gear on the planetary gear holder. The at least one planetary gear has a gear meshed externally with the ring gear and internally with the central sun gear, a planetary gear shaft fixed to the planetary gear holder and a pair of bearings supporting the gear on the planetary gear shaft. The planetary gear shaft and the planetary gear holder are engaged so that the planetary gear shaft is axially adjustable on the planetary gear holder in an operational configuration in which the planetary gear shaft performs an axial tightening action on the pair of bearings exhibiting an axial clearance adapted to allow rotation of the pair of bearings.

A planetary carrier arrangement Includes a planetary carrier, and a lubricant dispensing unit designed to dispense lubricant into the planetary carrier. The lubricant dispensing unit includes an axially elastically movable thrust ring designed to compensate an axial offset of the planetary carrier. The thrust ring has a side in facing relationship to the planetary carrier, with the side designed to include a lubricant pocket thereon.

Examples in the disclosure relate to an apparatus and method for disassembling automatic transmission shaft assemblies. The apparatus may include a body portion defining multiple gear lands oriented normal to a pressing direction, each gear land having a semi-circular shape partially encompassing a central opening. The apparatus may include a moveable portion limited to movement between generally opposing positions, movement thereof reconfiguring the apparatus to enable positioning of a plurality of transmission shaft assemblies each having a unique configuration. The method may include sequentially placing each transmission shaft on the fixture, pressing the transmission shaft to remove press-fit components, and reconfiguring the fixture to enable positioning of a next shaft assembly, each shaft assembly having a unique configuration of press-fit components.

An epicyclic gear assembly includes a carrier that includes a first plate axially spaced from a second plate by a connector. A first epicyclic gear set is supported adjacent the first plate and includes a first set of circumferentially offset intermediate gears meshing with a first sun gear and a first ring gear. A second epicyclic gear set is axially spaced from the first epicyclic gear set and supported adjacent the second plate and includes a second set of circumferentially offset intermediate gears meshing with a second sun gear and a second ring gear. The first epicyclic gear is set and the second epicyclic gear set maintain relative intermeshing alignment during flexure-induced deformation of the carrier. The first ring gear includes a first set of teeth that extends from a first flexible flange and the second ring gear includes a second set of teeth that extends from a second flexible flange.

An epicyclic gear assembly includes a carrier that includes a first plate axially spaced from a second plate by a connector. A first epicyclic gear set is supported adjacent the first plate and includes a first set of circumferentially offset intermediate gears meshing with a first sun gear and a first ring gear. A second epicyclic gear set is axially spaced from the first epicyclic gear set and supported adjacent the second plate and includes a second set of circumferentially offset intermediate gears meshing with a second sun gear and a second ring gear. The first epicyclic gear is set and the second epicyclic gear set maintain relative intermeshing alignment during flexure-induced deformation of the carrier. The first ring gear includes a first set of teeth that extends from a first flexible flange and the second ring gear includes a second set of teeth that extends from a second flexible flange.