A hub for partially muscle-powered vehicles, including a hollow hub axle with a cylindrical inner through hole for the passage of a clamping axle, a hub shell rotatably supported relative to the hub axle by two hub bearings, a rotor rotatably supported relative to the hub axle, and a freewheel device with a hub-side freewheel component and a rotor-side freewheel component, each having axial engagement components for engagement with one another. The hub shell is rotatably supported relative to the hub axle in a rotor-side end region by a rotor-side hub bearing, and in an opposite end region of the hub shell by another hub bearing. The hub-side freewheel component is non-rotatably connected with the hub shell. The rotor-side freewheel component is non-rotatably connected with the rotor and is movable in the axial direction relative to the rotor and the hub shell between a freewheel position and an engagement position.

A rolling bearing is mounted on a gear shaft, which extends along an axis and carries a first and a second toothing axially separated from each other by a cylindrical portion of the gear shaft. Such a cylindrical portion has an outer diameter smaller than that of the first toothing. The bearing is provided with rolling bodies, a cage with seats engageable by the rolling bodies, and an outer ring defining an outer rolling path for the rolling bodies. During assembly, the cage is fitted around the first toothing and axially displaced towards the second toothing until it is arranged around the cylindrical portion. In this step, the tenons of the cage pass in the slots between the teeth of the first toothing. Subsequently, the rolling bodies are radially inserted in the respective seats so as to be arranged against the cylindrical portion.

A hub structure includes an axle housing, a hub having an insertion hole in a vehicle width direction through which the axle housing is inserted, and an inner bearing disposed between the hub and the axle housing in the insertion hole and rotatably supporting the hub with respect to the axle housing, and an oil seal disposed between the hub and the axle housing in the insertion hole on an inner side relative to the inner bearing in the vehicle width direction. A spacer is provided between the inner bearing and the oil seal in the insertion hole. The spacer has an outer end surface that is contactable with an inner end surface of an inner race of the inner bearing.

The invention relates to a bearing arrangement for a bevel gear drive, comprising a housing (14), a pinion (12), which includes a pinion shaft (12a) and a bearing journal (12b), and a crown wheel (13), which is meshed with the pinion (12), wherein the pinion (12) is supported with respect to the housing (14) via the bearing journal (12b) and the pinion shaft (12a) with the aid of antifriction bearings (15, 16).

It is provided that the pinion (12) is supported via two tapered roller bearings (15, 16) pitched with respect to one another, wherein the first tapered roller bearing (15) is arranged on the bearing journal (12b) and the second tapered roller bearing (16) is arranged on the pinion shaft (12a) and their pressure lines (d) form an X arrangement.

A vehicular power transmission device includes: a support member; first and second rotating shafts rotating about a shaft; and first and second bearings supporting first and second rotating shaft, respectively, to be rotatable with respect to the support member. Further, an oil hole is formed in the support member for supplying lubricating oil to a space between the first bearing and the second bearing, the space is divided into first and second spaces on sides of first and second bearings, respectively, by a partition wall formed on the support member, the oil hole is formed in the support member so as to discharge the lubricating oil to one space of the first space and the second space, and a communication hole communicating with the first space and the second space is formed in the partition wall.

A power transmission device for a vehicle includes a support member; a first bearing rotatably supporting a first rotation shaft with respect to the support member; a second bearing, provided adjacent to the first bearing, rotatably supporting a second rotation shaft with respect to the support member, the second rotation shaft being rotated around an axis line same as an axis line of the first rotation shaft; and a partition wall formed in the support member and including a notch. Further, the support member includes an oil gallery to supply lubricating oil into a space formed between the first bearing and the second bearing, the space is partitioned into a first space on a side of the first bearing and a second space on a side of the second bearing by the partition wall, and the oil gallery is formed to eject the lubricating oil toward the notch.

A bearing assembly for an electrical generator includes a frame, a bearing liner and a ring. The frame is configured to connect with a housing of an electrical generator. The frame includes a frame opening and is made from a first material. The bearing liner connects with the frame. The bearing liner is made from a second material, which is dissimilar from the first material. At least a portion of the bearing liner passes through the frame opening. The ring surrounds the bearing liner. The ring contacts the frame and the bearing liner and maintains a clearance between the portion of the bearing liner passing through the frame opening and the frame.

A bearing assembly for an electrical generator includes a frame, a bearing liner and a ring. The frame is configured to connect with a housing of an electrical generator. The frame includes a frame opening and is made from a first material. The bearing liner connects with the frame. The bearing liner is made from a second material, which is dissimilar from the first material. At least a portion of the bearing liner passes through the frame opening. The ring surrounds the bearing liner. The ring contacts the frame and the bearing liner and maintains a clearance between the portion of the bearing liner passing through the frame opening and the frame.

A robot joint, including: a housing; an output shaft, at least partially housed inside the housing and provided with a shaft portion and a flange portion at a first end of the shaft portion; a first bearing portion, housed in the housing and supporting a first position of the flange portion of the output shaft; a second bearing portion, housed in the housing and supporting a second position of the output shaft in an axial direction; and a motor, housed in the housing, where the second bearing portion is arranged between the motor and the first bearing portion along the axial direction of the output shaft. Further provided is a robot. By effectively supporting the output shaft at multiple points, the output shaft is enabled to more effectively and stably bear the moment or bending moment of a load, and the robot joint structure is enabled to be compact and lighter.

The present innovation relates generally to propulsion mechanisms for propeller-driven vehicles and vessels, and, more particularly, to gear-driven transmissions for airboats.