Planetary friction transmission mechanism.

摘要

A planetary friction transmission mechanism includes elastic planetary rollers (9) disposed between the outer ring (13) and one of the drive and driven shafts (3; 7) acting as a sun roller and carried by the bearing retainer (10) which is connected to the other one of the drive and driven shafts. The planetary rollers and the bearing retainer revolve round the sun roller while the planetary rollers rotate on their own axes, thereby accelerating or decelerating the driven shaft relative to the drive shaft to rotate the rotary member held on the driven shafts. The drive and driven shafts are formed with axial passages (15, 16) contiected to an oil source (T) for introducing lubricating oil therethrough and forcibly feeding the oil therefrom toward the radially outward direction through its radial passages for effective lubrication. The application of this mechanism to a rotor type open end fine spinning machine enables its driven shaft holding a spinning rotor to rotate at a far higher speed with extremely reduced noises, as compared with the prior art.