| 摘要 |
A clutch disk assembly 1 is provided between an input shaft and an output shaft to selectively transmit rotation therebetween. The clutch disk assembly 1 is provided with a dampening mechanism 4 to provide smooth transition during engagement and disengagement of the clutch disk assembly. The dampening mechanism 4 has more durable first and second retaining plates 31 and 32 with a rectangular window portion for transmitting torque. The first and second retaining plates 31 and 32 are used to support first springs 16 of the clutch disk assembly. The first and second retaining plate 32 includes a plate main body having a disk shape and a second receptacle 36 to support first springs 16. The second receptacles 36 are formed from that plate main body. The second receptacles 36 project in an axial direction from the plate main body so as to be able to seat the first spring 16. The second receptacles 36 include axially supporting parts 36a to support an axially outside part of the first springs 16, a radially outside supporting parts 36d to support a radially outside part of the first springs 16, and second supporting parts 37 formed at both sides in a circular direction to support both ends of the first springs 16. The radially outside supporting part 36d includes an intermediate part 36h, and curved indented end parts 36i which is located outward in a radial direction from the intermediate part 36h. The first and second retaining plates 31 and 32 are designed to maintain the thickness of the curved indented end parts 36i of the radially outside supporting parts 36d, thereby maintaining the durability of the second receptacles 36.
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