| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of components of a thrust roller bearing, and to easily assemble a carrier which supports planetary rollers.SOLUTION: A rotating shaft 34 which is rotationally driven by an electric motor is arranged on an axial core of an outer ring member 21 in a housing 20, and a plurality of planetary rollers 49 are rotatably supported by a carrier 40 which is rotatably supported. Circumferential grooves 52 which are engaged with spiral projections 51 formed at an inside diameter face of the outer ring member 21 are formed at outside diameter faces of the planetary rollers 49, the planetary roller 49 are revolved and rotated by the rotation of the rotating shaft 34 while friction-contacting with the rotating shaft 34, and the outer ring member 21 is linearly moved to an axial direction. Thrust cage rollers 53 with end faces of the planetary rollers 49 as raceway surfaces are embedded between opposing faces of the planetary rollers 49 and discs 41a arranged at the carrier 40, and a raceway board 57 which is common for use in the plurality of thrust cage rollers 53 is embedded between opposing faces of the plurality of thrust cage rollers 53 and the discs 41a.SELECTED DRAWING: Figure 2 |
