ROTATION TRANSMITTING DEVICE

摘要

A rotation transmission device includes a two-way clutch (10) which is selectively engaged and disengaged by an electromagnetic clutch (50). The two-way clutch (10) includes a retainer (16) including a control retainer member (16A) and a rotary retainer member (16B). The control retainer member (16A) and the rotary retainer member (16B) have flanges (24 and 28) and bars(25 and 29) formed on the outer peripheral portions of the respective flanges and arranged so as to circumferentially alternate with each other with pockets (31) defined between adjacent bars (25 and 29). A pair of rollers (15) are received in each pocket (31). When the control retainer member (16A) and the rotary retainer member (16B) are rotated relative to each other, the rollers (15) are adapted to be pushed by the bars (25 and 29) to the disengaged position. An anti-rotation means (60) is provided on opposed surfaces of an outer ring (11) and the control retainer member (16A). The anti-rotation means (60) is adapted to prevent the control retainer member (16A) from rotating relative to the outer ring (11) while the rollers (15) are in engagement, thereby preventing the rollers (15) from moving to the neutral position. This improves reliability of the rotation transmission device.