A gearbox includes a sun gear, a plurality of planetary gears meshed with the sun gear, a rotating frame supporting the planetary gears, and a housing with an internal ring gear meshed with the planetary gears. The planetary gears include a first gear and a second gear coaxially connected to each other along an axial direction and rotating synchronously, the first gear meshed with the sun gear, and the second gear meshed with the internal ring gear of the housing. The rotating frame received in the housing has an upper frame and a lower frame with a central hole, each of the plurality of planetary gears is arranged between the upper frame and the lower frame by a mounting pin, the lower frame is supported by a flange connected to the housing, the sun gear is driven to rotate so as to operate the rotating frame. The gearbox of the present disclosure has low vibration and low noise.

A decoupling ring suitable for a planetary gear is disclosed. A decoupling ring includes an annular elastomeric base body and elastomeric formations. In embodiments, the elastomeric formations are uniformly spaced apart from one another, project in the radial direction from the base body, and run parallel to a central longitudinal axis passing centrally through the decoupling ring. With embodiments of the decoupling ring it is possible for the decoupling ring to be arranged on the circumferential side of a ring gear of a planetary gear.

A transmission housing (1) which can be coupled to the drive shaft (21) of an electric motor (20) to form a gearbox (22), the transmission housing (1) comprising a housing body (2) defining a cavity (4), and housed at least partially inside the cavity (4)—a rotary drive member (5),—an output shaft (6) and,—a device (7) for transmitting the rotational movement of the rotary drive member (5) to the output shaft (6), characterised in that the rotary drive member (5) is supported inside the cavity (4) of the housing body (2) by one or more guide members (8) and comprises a wall (9) and two coaxial helical teeth (10) created from a single part with the wall (9) and arranged on either side of the wall (9), the helical teeth (10) being configured to generate axial forces in opposite directions.

This gear wheel mechanism includes a rotator, a first gear wheel, a second gear wheel, and a reinforcement member. The rotator is configured to be rotatable about a rotation shaft and has an elliptical shape as viewed in an axis direction of the rotation shaft. The first gear wheel includes a first base portion including a first outer circumferential surface and a first inner circumferential surface and having a hollow cylindrical shape configured to be deformable by the rotator being inserted in the axis direction of the rotation shaft and external teeth formed in the outer circumferential surface. The second gear wheel includes a second base portion including a second outer circumferential surface and a second inner circumferential surface and having a hollow cylindrical shape disposed to cover the external teeth and internal teeth which are formed at positions facing the external teeth of the second inner circumferential surface, with which the external teeth are partially engaged in accordance with deformation of the first base portion by rotation of the rotator. The reinforcement member is disposed in contact with a region of the second outer circumferential surface corresponding to a region in which the internal teeth of the second inner circumferential surface are formed.

A steering reaction force apparatus for a vehicle includes: a housing that is openable and closable by a cover unit, a stator unit fixed to an inside of the housing, a rotor unit disposed to face the stator unit and to be rotated by electromagnetic interaction with the stator unit, a transmission shaft unit connected to the rotor unit to rotate in conjunction with the rotor unit, a power transmission unit disposed inside the rotor unit to transmit a rotational force of the transmission shaft unit to a steering shaft, and a retainer unit to support the power transmission unit with respect to the cover unit.

A planetary gearbox includes a ring gear accommodated in a housing part, the ring gear particularly has on its radially outer surface, in particular its radially outer side, an annular groove, the annular groove, in particular a circumferential annular groove in the circumferential direction, and a spring element is accommodated in the annular groove, which projects at least partially into an annular groove introduced into the housing part.

An axle system is provided herein. In one example, the axle system includes a gearbox housing at least partially enclosing a gearbox and a planetary gearset that is rotationally coupled to an output of the gearbox and positioned co-axial with a rotational axis of an axle shaft in a differential. The planetary gearset includes a ring gear grounded by a planetary support that is attached to the gearbox housing.

A stator ring-internal gear assembly for a transmission device comprising a planetary gear of a wheel hub drive for a vehicle, the assembly may include a stator ring of an electrically operable electric motor device of the wheel hub drive for providing a motor torque and an internal gear of the transmission device for translating the provided motor torque into a net torque. The stator ring and the internal gear may be directly fixed to one another by positive connection in a non-rotatable and tension-resistant manner. The stator ring and the internal gear may form a mono-lithic unit.

A gear rim carrier part for a two- or multi-component gearwheel includes an annular section which revolves around an axis of rotation in the circumferential direction, a gear rim arranged radially on the outside of the annular section, and a projection which extends radially inwards from the annular section and has a radially inner free end, or the gear rim carrier part includes an annular section which revolves around an axis of rotation in the circumferential direction, a gear rim arranged radially on the inside of the annular section, and a projection which extends radially outwards from the annular section and has a radially outer free end. The projection has a first width at the radially inner free end thereof or at the radially outer free end thereof and has a second width at the opposite end thereof at the transition to the annular section.

An in-wheel drive device includes: a wheel bearing including a hub and an outer race spaced apart outward in a radial direction from the hub; and a speed reducer including a ring gear coupled to the wheel bearing. An outer surface of the ring gear, in the radial direction, and an inner surface of the wheel bearing, in the radial direction, adjoin to define first and second regions. The ring gear includes a protruding portion disposed on the outer surface of the ring gear in the second region and having a shape protruding toward the inner surface of the wheel bearing. The wheel bearing includes a recessed portion disposed on the inner surface of the wheel bearing in the second region and having a shape corresponding to a shape of the protruding portion. The protruding portion and the recessed portion engage each other in the second region.