PLANETARY ROLLER TYPE POWER TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a planetary roller type power transmission device with improved transmission efficiency.SOLUTION: A planetary roller type power transmission device includes: a first rotary shaft 10 having a sun roller 11; a first internal ring 12 which is restrained from moving in a circumferential direction relative to a casing 2; a second internal ring 14 connected to a second rotary shaft 13; two or more planetary rollers 15 which are in contact with the sun roller, the first internal ring, and the second internal ring; a carrier 16 which rotatably supports the planetary rollers through planetary shaft members 3; and bearings 61 and 62 which support the carrier so that the carrier may rotate relative to the first rotary shaft. The carrier has: a first carrier member 161 which supports a first end part of each planetary shaft member penetrating through the planetary roller; and a second carrier member 162 which supports a second end part of each planetary shaft member. The bearings has: the first bearing 61 which supports the first carrier member at a position located closer to a first end part side than the sun roller; and the second bearing 62 which supports the second carrier member at a position located closer to a second end part side than the sun roller.SELECTED DRAWING: Figure 1