| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a clutch drum which can increase material yield, which is excellent in strength, and which can eliminates the leakage of working oil from the pressure oil chamber. SOLUTION: A spline tooth 21a is formed on the middle part of the inner periphery, a curved surface part 24 is formed on one end side 21b of an outer cylindrical part 21, and a grooved step part 25 is formed on the inner periphery of the tip part of the curved surface part 24. Separately from the outer cylindrical part 21, one end side 22b of an inner cylindrical part 22 and an inner end side 23b of a bottom plate part 23 are connected to each other, and the bottom plate part 23 and the inner cylindrical part 22 are integrally press-formed. An outer end side 23c of the bottom plate part 23 is positioned in the step part 25 to be inserted and attached, and the abutting part where the bottom part of the step part 25 abuts on the outer end side 23c of the bottom plate part 23 is welded 26 from outside to connect and form the inner cylindrical part 22 and the bottom plate part 23 integrally with the outer cylindrical part 21.</p> |
