Plate member having radially extending support portions for a damper disc assembly

摘要

The retaining plate (3) is disposed in a clutch disc assembly in which torque is transmitted through a coil spring and is intended for transmitting torque from an input member to the coil spring. The retaining plate (3) is formed with a first window portion (3a). The first window portion (3a) includes a tunnel portion having a convex shape so as the coil spring to be disposed therein. The tunnel portion (21) of the first window portion (3a) is integral with the retaining plate (3) in the radial direction and is formed with the second holes (23) on its circumferentially opposite ends. A circumferential support portion (22) is formed on the circumferentially opposite ends of the tunnel portion (21).