A power generation system includes: at least one power generating device generating electric power by rotation of an input shaft; and a power storage circuit including at least one capacitor and storing energy of the electric power generated by the power generating device. The power storage circuit has a capacitance equal to or near an energy-maximizing capacitance, the energy-maximizing capacitance indicating a capacitance maximizing an upper limit energy in characteristics of energy to capacitance, the characteristics being calculated as the upper limit energy to be stored in the power storage circuit, with respect to the capacitance of the power storage circuit. The characteristics of energy to capacitance are calculated based on: the capacitance of the power storage circuit, an electromotive force of the power generating device, an internal resistance of the power generating device, and a duration of one power generating action of the power generating device.

A rolling bearing for mounting a driving worm of a power-assisted steering system of a vehicle includes a rotatable inner ring and a rotationally fixed outer ring. Rolling elements arranged between the inner and outer ring are guided by a channel-shaped first raceway arranged on a radially outer side of the inner ring and by a channel-shaped second raceway arranged on a radially inner side of the outer ring. The second raceway includes a cross-sectional profile that varies around its circumference. The cross-sectional profile allows laterally offset rolling elements to roll and thus tilting of the inner ring about a tilting axis orthogonal to the axis of rotation of the rolling bearing if the tilting axis assumes a predetermined tilted position in the circumferential direction of the second raceway and limits tilting of the inner ring to a minimum when the tilting axis is angled 90° to the tilted position.

An axle assembly having an electric motor module, a drive pinion, and at least one rotor bearing assembly. The electric motor module may have a rotor. The rotor and the drive pinion may be rotatable about a first axis. The first rotor bearing assembly may extend between the drive pinion and the rotor.

An apparatus includes a generator, a case, a first bearing configured to rotatably support a rotating shaft of the generator on a side of one end portion, and a second bearing configured to rotatably support the rotating shaft on a side of the other end portion. The case includes a first wall portion that forms an accommodation space, and a second wall portion that covers an end portion of the first wall portion. The first bearing is supported by the second wall portion. The rotating shaft includes an input portion on a side of the other end portion of the second bearing, and a transmission portion configured to transmit, to the second bearing, a thrust load of the rotating shaft acting from the other end portion toward the one end portion.

Drive units for a vehicle having an electric machine and a transmission device are disclosed, as well as methods for assembling the drive units. The method may include mounting the transmission device in a transmission housing; passing an assembly mandrel axially through an aperture in the transmission housing and through a pinion shaft, which is designed as a hollow shaft and is rotatably mounted in the transmission housing; and centering a rotor shaft, which is designed at least partially as a hollow shaft, on the assembly mandrel. A rotor of the electric machine may be pushed axially onto the rotor shaft; the rotor shaft may be inserted axially into the pinion shaft, wherein a set of splines on the rotor shaft engages in a set of splines on the pinion shaft; a stator of the electric machine may be pushed axially onto the rotor of the electric machine and fixing the stator on the transmission housing; and the assembly mandrel may be removed and the aperture in the transmission housing may be closed with a closure cover.

A rotating device according to the present invention includes a motor including an outer shell, a rotating shaft protruding from the outer shell, a first inner bearing supporting the rotating shaft, and a second inner bearing supporting the rotating shaft, a plurality of gears configured to transmit rotation of the motor to an external device, and a casing. A first outer bearing and a second outer bearing are arranged at the casing, and the first outer bearing and the second outer bearing rotatably support portions of the rotating shaft protruding from end surfaces at both sides of the outer shell in a longitudinal direction of the rotating shaft.

This speed reducer with an electric motor has: a hollow shaft; a casing fixed to the hollow shaft; a fixed part that is relatively stationary with respect to the casing; an electric motor; a speed reduction mechanism; an output part; and a torque sensor that is connected to the casing and the fixed part. The torque sensor has an elastically deformable strain body that has an annular outer ring and an annular inner ring and a plurality of strain sensors. The outer ring and the inner ring are respectively located at an end portion on the radial outside and the radial inside of the torque sensor and is connected to one of the casing and the fixed part. Each of the plurality of strain sensors is at least partially located in a radial direction between the outer ring and the inner ring.

A gear device includes an internal gear, a flexible external gear, and a wave generator. The wave generator has an elliptic cam and a bearing. An inner ring has an inner ring raceway surface which a plurality of balls are in contact with, and a pair of inner ring shoulder parts. At a position of a minor axis, a first inner ring shoulder part has a greater height than a second inner ring shoulder part. At a position of a major axis, the second inner ring shoulder part has a greater height than the first inner ring shoulder part.

An axle assembly having an electric motor module, a drive pinion, and at least one rotor bearing assembly. The electric motor module may have a rotor. The rotor and the drive pinion may be rotatable about a first axis. The first rotor bearing assembly may extend between the drive pinion and the rotor.

A multi-directional ball rotation apparatus designed to maneuver an item in a plurality of directions is provided. The ball rotation apparatus includes a main housing, a first motor coupled to the main housing and having a first rotatable spindle, a shaft rotatably mounted to the main housing and operably connected to the first spindle of the motor, and a spherical member coupled to the shaft and designed to engage the item. The first spindle of the first motor is designed to rotate in a first direction to rotate the spherical member and item in a first direction. The first spindle of the first motor is designed to rotate in a second direction to rotate the spherical member and item in a second direction.