| 摘要 |
An overrunning coupling assembly includes a notch plate (62) and an annular coupling pocket plate (94) positioned in face-to-face relationship. The pocket plate (94) has strut pockets (86) disposed at angularly spaced positions. The notch plate (62) has notch recesses (70) at angularly spaced positions positioned in juxtaposed relationship with respect to the strut pockets (86). Torque-transmitting struts (66) are positioned in each of the strut pockets (86). Each strut (66) has first and second ears (80, 82) at one edge thereof for enabling pivotal motion of the struts (66) about an ear axis (90). The opposite edge (88) of each strut (66) is movable between disengaged and engaged positions with respect to one of the notch recesses (70) whereby one-way torque transfer may occur between the plates (62, 94). A lubricant (99) flows between the notch plate (62) and pocket plate (94). A spring (98) is positioned in each strut pocket (86) and biases the respective strut (66) toward the notch plate (62). Each spring (98) engages the respective strut (66) intermediate the ear axis (90) and the opposite edge (88). Each strut pocket (86) provides sufficient clearance forward of the respective opposite edge (88) of the strut (66) to allow forward sliding movement of the respective strut (66) during overrunning to cause the engagement of the respective spring (98) and strut (66) to occur nearer the ear axis (90), which enables frictional forces of the flowing lubricant (99) to hold the strut (66) in its disengaged position to prevent the strut (66) from slapping against the notch recesses (70) as the notch plate (62) and pocket plate (94) are respectively counterrotated. |
