To provide a planetary roller mechanism capable of restraining reaction in an axial direction from acting on a member for supporting a cam disc.
In this planetary roller mechanism 20 for transmitting motive power, a contacting part of a pair of ring rollers 22 and 23 arranged on both sides in the axial direction of a pinion roller 24 and the pinion roller, is formed in a tapered shape of expanding in the axial direction inward from the outside in the radial direction. A pair of disc parts 26b and 26c have the integrally formed cam disc 26 mutually opposed in the axial direction by sandwiching the pair of ring rollers and connected outside in the radial direction of the ring rollers, and a rolling element 28 arranged between the disc parts and the ring rollers, and have a torque cam 25 for making pressing force in the axial direction toward the pinion roller act on the ring rollers from the disc parts by the motive power of the ring rollers. The cam disc is arranged in a plurality in the peripheral direction of the pair of ring rollers, and is also respectively fixed to a support member.
SANO TOSHISHIGE
MIZUNO SACHIHIRO
HAYAKAWA KISABURO
TOYOTA CENTRAL RES & DEV