To provide a planetary roller mechanism capable of restraining reaction in an axial direction from acting on a member for supporting a cam disc.
This planetary roller mechanism 20 has a pair of ring rollers 22 and 23 opposed in the axial direction, and a pinion roller 24 respectively contacting with a sun roller 21 and the pair of ring rollers, and transmits motive power. A contacting part of the pair of ring rollers arranged on both sides in the axial direction of the pinion roller and the pinion roller, is formed in a tapered shape of expanding in the axial direction inward from the outside in the radial direction, and has a pair of cam discs 26 and 27 respectively arranged on one side and the other side in the axial direction to the pair of ring rollers, and has a torque cam 25 for making pressing force in the axial direction toward the pinion roller act on the ring rollers in response to the transmitting motive power. The pair of cam discs are integrally fixed to a support member 4 by mutually opposing in the axial direction.
| WO/2014/017609 | ELECTRIC DISC BRAKE DEVICE |
| JPH04327050 | PLANETARY FRICTION DRIVE |
SANO TOSHISHIGE
MIZUNO SACHIHIRO
HAYAKAWA KISABURO
TOYOTA CENTRAL RES & DEV