摘要:
A wheel hub unit is provided including at least one planetary gear set, including a sun gear, one set of planet gears, a carrier, and a ring gear, wherein each of the planet gears of the set of planet gears is provided with an engagement arrangement adapted for engagement with a corresponding engagement arrangement of the ring gear, wherein the engagement is provided at an engagement area in which the engagement arrangement of the planet gears overlap the engagement arrangement of the ring gear, a bearing, including an inner bearing ring, an outer bearing ring and lolling elements, wherein the inner bearing ring constitutes the ring gear of the planetary gear set, and wherein a center of each of the respective rolling elements is axially displaced in relation to the engagement area. A vehicle including such a wheel hub unit is also provided.
摘要:
Provided is an in-wheel motor drive device, including a casing configured to hold a motor part, a speed reduction part, and a wheel bearing part, the motor part including: a stator, which is fixed to the casing; a rotation shaft of a motor, which is rotatably supported on the casing through intermediation of rolling bearings; and a rotor, which is mounted to the rotation shaft of the motor. The rolling bearing has a radial internal clearance of from 8 µm to 25 µm before being mounted into the motor part. The rotation shaft of the motor is rotatably supported on the casing through intermediation of a plurality of rolling bearings. The rotation shaft of the motor and the rolling bearings configured to support the rotation shaft of the motor are fitted to each other by transition fit or interference fit.