The present disclosure may relate to centerless wheel assembly that includes a centerless rim including a first center point laying in a first plane generally defined by the centerless rim. The centerless wheel assembly may also include a centerless ring gear coupled to the centerless rim such that rotation of the centerless ring gear causes a corresponding rotation of the centerless rim. The centerless ring gear may include a second center point laying in a second plane generally defined by the centerless ring gear, and the first plane may be generally parallel to the second plane. Additionally, the centerless ring gear may be shaped to interface with a drive gear that drives the centerless ring gear.

A driving apparatus includes a drive output member configured to, when driving a member to be driven, receive a first force from the member to be driven in a direction in which the drive output member comes off a rotation shaft of a motor, and when driven by a drive transmission member, receive a second force from the drive transmission member in a direction opposite to that of the first force. The second force is equal to or greater than the first force.

A driving apparatus includes a drive output member configured to, when driving a member to be driven, receive a first force from the member to be driven in a direction in which the drive output member comes off a rotation shaft of a motor, and when driven by a drive transmission member, receive a second force from the drive transmission member in a direction opposite to that of the first force. The second force is equal to or greater than the first force.

A driving device includes a motor including a rotating shaft, a drive transmission member attached to the rotating shaft and including a contact portion, and a drive output member including a contacted portion with which the contact portion comes into contact, and configured to be rotated around the rotating shaft when the rotating shaft of the motor is driven and the drive transmission member is rotated together with the rotation shaft in a first direction. The drive transmission member further includes an engaging portion. The drive output member includes an engaged portion with which the engaging portion is to be engaged when the drive output member is rotated relative to the drive transmission member in a second direction opposite to the first direction. A driving force is transmittable to the drive output member whether the drive transmission member is rotated in the first direction or the second direction.

A left-right wheel driving device (10) includes: a casing (15) including a reservoir (18) that stores oil; a suction port (19) that is disposed on the reservoir (18) and that sucks the oil from the reservoir (18); and two gears (34) that are each having helical teeth, that are supported so as to be rotatable about a rotating shaft (13) at least in one direction (D), that are provided on a power transmission path that transmits power to left and right wheels of a vehicle, and that are spaced apart from each other. The suction port (19) is positioned between the two gears (34). Each of the gears (34) is offset from the suction port in an axial direction of the rotating shaft (13), being in a state of being partially immersed in the oil stored in the reservoir (18). The helical teeth of each of the gears (34) extend in the one direction (D) and in a direction that departs from the suction port (19).

A motor assembly includes a first shaft rotatable about a motor axis, a second shaft that extends along the motor axis and is connected to the first shaft on one side in an axial direction of the first shaft to be movable in the axial direction, a first bearing that supports an end at another side in the axial direction of the first shaft, a second bearing that supports an end at one side in the axial direction of the first shaft, a third bearing that supports an end at another side in the axial direction of the second shaft, and a fourth bearing that supports an end at one side in the axial direction of the second shaft. An elastic portion is on a surface opposing another side in the axial direction of the outer ring of the first bearing.

An apparatus and methods are provided for a portal spindle assembly for a vehicle front suspension. The portal spindle assembly comprises a spindle portion that is rotatably coupled with upper and lower connecting arms. A leading-edge portion is rotatably coupled with a steering rod-end joint, such that moving the steering rod-end joint rotates the spindle assembly with respect to the upper and lower connecting arms. An inboard case and an outboard case support a pinion gear assembly that is meshed with an output gear assembly for communicating torque from a constant velocity joint to a front wheel coupled to the output gear assembly. The pinion gear assembly is aligned along a pinion axis disposed at an angle with respect to a hub axis of the output gear assembly. The angle facilitates a suspension geometry that provides a camber change of the front wheel that eliminates a change in track width.

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.

A rotary mechanical system includes a driving machine, a transmission unit that includes a main shaft, a main gear, an auxiliary gear meshing with the main gear, an auxiliary shaft, and a first gear, a gearbox that includes a second gear meshing with the first gear, an input shaft with the second gear fixed, and an output shaft that shifts a rotation speed of the input shaft, and a rotary machine that includes a rotary machine shaft connected to the output shaft. The first gear is a spur gear having a plurality of first tooth portions which are spur teeth whose teeth traces are parallel to the central axis. The second gear has a plurality of second tooth portions which are spur teeth whose teeth traces are parallel to the central axis, and each of which is disposed between the adjacent first tooth portions.

Embodiments of a system, method and apparatus for a gear are disclosed. For example, a metallic gear hub can include an axis of rotation and metallic gear teeth. The metallic gear teeth can be smaller than a final gear teeth size of the gear. The metallic gear teeth can be co-planar with the axis. In addition, the metallic gear teeth can be non-orthogonal to the axis. A polymer layer can be located on the metallic gear teeth to form polymer gear teeth on the metallic gear teeth. The polymer gear teeth can form the final gear teeth size of the gear.